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RRB JE · General Science

Physics: Electricity & Magnetism Previous Year Questions

59 Physics: Electricity & Magnetism (General Science) questions asked in RRB JE previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.

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Other General Science topics

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Q1RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Fleming’s Left-Hand Rule is used to determine _________.
  1. Athe amount of current flowing through the conductor
  2. Bthe strength of the magnetic field
  3. Cthe direction of force on a current-carrying conductor
  4. Dthe magnitude of the force on a current-carrying conductor
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Correct answer: (C) the direction of force on a current-carrying conductor

Q2RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Which of the following is a safety device used to prevent excessive current from flowing in electrical circuits?
  1. ACapacitor
  2. BResistor
  3. CFuse
  4. DTransformer
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Correct answer: (C) Fuse

Q3RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
An electric fan becomes warm if used continuously for longer time. This happens due to:
  1. Athe slow rotation of the fan
  2. Bthe fast rotation of the fan
  3. Cheating effect of the current flowing through the fan
  4. Dthe high temperature during the summer
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Correct answer: (C) heating effect of the current flowing through the fan

Q4RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
An electric refrigerator rated 400 W operates 8 hours/day. What is the cost of the energy to operate it for 30 days at ₹3.00 per kW h?
  1. A₹400
  2. B₹36
  3. C₹288
  4. D₹9.6
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Correct answer: (C) ₹288

Q5RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Which of the following devices operates based on the heating effect of electric current?
  1. ATransformer
  2. BGenerator
  3. CElectric iron
  4. DElectric motor
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Correct answer: (C) Electric iron

Q6RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
What is the resistivity (ρ) of a material?
  1. AThe product of voltage and current
  2. BThe amount of current a material can carry
  3. CThe same as its resistance
  4. DA measure of how strongly a material opposes the flow of electric current
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Correct answer: (D) A measure of how strongly a material opposes the flow of electric current

Q7RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
What happens to the resistance of most conductors as their temperature increases?
  1. AIt increases.
  2. BIt remains the same.
  3. CIt decreases.
  4. DIt becomes zero.
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Correct answer: (A) It increases.

Q8RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Why do iron filings arrange themselves in a pattern around a bar magnet?
  1. ABecause they are heavy
  2. BDue to gravitational force
  3. CBecause of the magnetic field
  4. DDue to electric charge
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Correct answer: (C) Because of the magnetic field

Q9RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
In which direction does the force act on a conductor placed in a magnetic field in an electric motor?
  1. AOpposite to the magnetic field
  2. BIn the direction of the current
  3. CAlong the magnetic field
  4. DPerpendicular to both the current and magnetic field
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Correct answer: (D) Perpendicular to both the current and magnetic field

Q10RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
The potential difference versus current plot for a conducting wire is a straight line. The slope of this line gives us the:
  1. Acurrent flowing through the wire
  2. Bresistance of the wire
  3. Cvoltage across the wire
  4. Dnumber of electrons in the wire
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Correct answer: (B) resistance of the wire

Q11RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
If three resistors of 6 Ω, 3 Ω and 2 Ω are connected in parallel, the total equivalent resistance is ________.
  1. A11 Ω
  2. B0.5 Ω
  3. C2 Ω
  4. D1 Ω
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Correct answer: (D) 1 Ω

Q12RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
According to experimental results, when does the magnitude of the force on a current-carrying conductor in a magnetic field become the highest?
  1. AWhen the current is perpendicular to the magnetic field
  2. BWhen the current is opposite to the magnetic field
  3. CWhen the current is parallel to the magnetic field
  4. DWhen the current flows at any angle to the magnetic field
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Correct answer: (A) When the current is perpendicular to the magnetic field

Q13RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Which of the following will cause the greatest increase in power dissipation for a given resistor?
  1. ADoubling the voltage across the resistor
  2. BDoubling the resistance
  3. CHalving the current through the resistor
  4. DHalving the resistance
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Correct answer: (A) Doubling the voltage across the resistor

Q14RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Fleming's Right-Hand Rule is applicable in the case of _________.
  1. Aelectric motors
  2. Belectric generators
  3. Celectric kettles
  4. Dfuse wires
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Correct answer: (B) electric generators

Q15RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
The measure of how much a material resists the flow of charges is known as:
  1. Aresistivity
  2. Bpotential difference
  3. Ccurrent
  4. Dpower generated
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Correct answer: (A) resistivity

Q16RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Which of the following materials will have the least resistance at room temperature?
  1. AIron
  2. BAluminum
  3. CNichrome
  4. DCopper
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Correct answer: (D) Copper

Q17RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Which of the following is an example of a decomposition reaction that occurs due to the application of electric current?
  1. AHeating calcium carbonate
  2. BDecomposition of potassium permanganate by heat
  3. CDecomposition of sodium bicarbonate by heat
  4. DElectrolysis of water
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Correct answer: (D) Electrolysis of water

Q18RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Which of the following options is INCORRECT with relation to the given statement? The magnetic field lines of a bar magnet may be drawn using:
  1. Airon filings
  2. Ba magnetic compass
  3. Cwood particles
  4. Danother bar magnet
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Correct answer: (C) wood particles

Q19RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
What is the unit of electric power commonly used to measure household energy consumption?
  1. AKilowatt-hours
  2. BAmperes
  3. CJoules
  4. DWatts
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Correct answer: (A) Kilowatt-hours

Q20RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
If the resistance of a conductor is doubled while the current remains the same, how will the heat produced per unit time change?
  1. AIt will be halved.
  2. BIt will remain the same.
  3. CIt will quadruple.
  4. DIt will double.
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Correct answer: (D) It will double.

Q21RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
The magnetic field lines of a bar magnet may NOT be drawn using:
  1. Aanother bar magnet
  2. Ba magnetic compass
  3. Ciron filings
  4. Dwood particles
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Correct answer: (D) wood particles

Q22RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
Which of the following statements is correct regarding magnets?
  1. AA magnet can have either north or south pole.
  2. BA magnet is a dipole with north and south poles.
  3. CA magnet produces magnetic as well as electric fields.
  4. DA magnet can attract an electron.
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Correct answer: (B) A magnet is a dipole with north and south poles.

Q23RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
Which electrical appliance helps preserve food by maintaining low temperatures?
  1. AMicrowave
  2. BElectric kettle
  3. CRefrigerator
  4. DToaster
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Correct answer: (C) Refrigerator

Q24RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
If the resistance in a circuit is increased while the voltage remains constant, the current will __________.
  1. Adecrease
  2. Bincrease
  3. Cdouble
  4. Dremain constant
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Correct answer: (A) decrease

Q25RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
An electric fan is connected to a 220 V generator. The current is 0.50 A. What is the power used by the fan?
  1. A110 Watt
  2. B11 Watt
  3. C440 Watt
  4. D220 Watt
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Correct answer: (A) 110 Watt

Q26RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
The pattern of the magnetic field lines of a solenoid is similar to that of a:
  1. Aring magnet
  2. Bbar magnet
  3. Chorseshoe magnet
  4. Dbutton magnet
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Correct answer: (B) bar magnet

Q27RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
Which of these is NOT a property of magnetic field lines?
  1. AThey travel from south to north inside the magnet.
  2. BThey never intersect.
  3. CThey are continuous closed loops.
  4. DThey repel each other.
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Correct answer: (D) They repel each other.

Q28RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Resistance is the property of a material that _______.
  1. Aallows the flow of current
  2. Bopposes the flow of current
  3. Cgenerates electricity
  4. Dconverts electrical energy to mechanical energy
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Correct answer: (B) opposes the flow of current

Q29RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Why does a compass needle get deflected when brought near a bar magnet?
  1. AThe compass needle is non-magnetic.
  2. BThe compass needle has electric charge.
  3. CThe compass needle is a small bar magnet.
  4. DThe compass needle is made of iron.
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Correct answer: (C) The compass needle is a small bar magnet.

Q30RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Which of the following factors directly affects the resistance of a conductor?
  1. ALength of the conductor
  2. BPower of the conductor
  3. CVoltage across the conductor
  4. DCurrent through the conductor
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Correct answer: (A) Length of the conductor

Q31RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
A conductor has a current of 150 mA flowing through it with a resistance of 0.8 Ω. Find the potential difference across the conductor.
  1. A5.3 V
  2. B120 V
  3. C18.75 V
  4. D0.12 V
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Correct answer: (D) 0.12 V

Q32RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
The potential difference, V, across the ends of a given metallic wire in an electric circuit is directly proportional to the current flowing through it, provided its temperature remains the same. This is known as:
  1. AOhm's law
  2. BResistance law
  3. CNewton's law
  4. DAmpere's law
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Correct answer: (A) Ohm's law

Q33RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
An electric motor converts electrical energy into:
  1. Aelectron energy
  2. Bmagnetic energy
  3. Cnuclear energy
  4. Dmechanical energy
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Correct answer: (D) mechanical energy

Q34RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
If a conductor follows the Ohm’s law, then the graph between current and voltage will be a/an _______.
  1. Ahyperbola
  2. Bparabola
  3. Cstraight line
  4. Dellipse
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Correct answer: (C) straight line

Q35RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
If a resistor of 15 Ω carries a current of 2.5 A for 12 seconds, the heat produced is _____ joules.
  1. A450
  2. B1800
  3. C1125
  4. D900
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Correct answer: (C) 1125

Q36RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
The Fleming’s right hand rule is used to find the:
  1. Adirection of the magnetic field associated with a current carrying conductor
  2. Bdirection of the current of a current carrying conductor
  3. Cdirection of the motion of the current carrying conductor
  4. Ddirection of the gravitational field
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Correct answer: (B) direction of the current of a current carrying conductor

Q37RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
Ravi has purchased an aquarium and was surprised to know that regular cleaning of aquariums is essential. Why does it have to be regularly cleaned?
  1. ADead fish and plants may spoil the electric supply of the aquarium.
  2. BDead fish and plants are decomposed by microorganisms and smell bad.
  3. CDead fish and plants should be disposed of in the soil, not in water.
  4. DDead fish and plants may spoil the aeration system of the aquarium.
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Correct answer: (C) Dead fish and plants should be disposed of in the soil, not in water.

Q38RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
What do the magnetic field lines around a bar magnet represent?
  1. AThe movement of electrons around the magnet
  2. BThe flow of air around the magnet
  3. CThe direction and strength of the magnetic field
  4. DThe gravitational field
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Correct answer: (C) The direction and strength of the magnetic field

Q39RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
The magnetic field inside a long, straight solenoid carrying current is ____________.
  1. Auniform and parallel to the axis of the solenoid
  2. Binversely proportional to the current
  3. Czero
  4. Dstronger near the edges
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Correct answer: (A) uniform and parallel to the axis of the solenoid

Q40RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
An electric pole casts a shadow of length 42 m at a time when a tree 12 m high casts a shadow of length 16 m. Find the height of the pole.
  1. A31.5 m
  2. B30.5 m
  3. C29 m
  4. D33 m
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Correct answer: (A) 31.5 m

Q41RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What is the relationship between current (I), power (P), and voltage (V)?
  1. AI = P2V
  2. BI = PV
  3. CI = V ÷ P
  4. DI = P ÷ V
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Correct answer: (D) I = P ÷ V

Q42RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What is the primary purpose of an electric fuse in a household circuit?
  1. ATo reduce resistance in the circuit
  2. BTo increase current flow
  3. CTo regulate voltage supply
  4. DTo prevent overloading and short circuits
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Correct answer: (D) To prevent overloading and short circuits

Q43RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
What is the power rating of a device that draws 1.75 A of current when connected to a 180-V source?
  1. A105 W
  2. B315 W
  3. C225 W
  4. D440 W
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Correct answer: (B) 315 W

Q44RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
Which of the following rules is used to determine the direction of the force on a current-carrying conductor in an electric motor?
  1. AFleming’s Right-Hand Rule
  2. BAmpere's Law
  3. CRight-Hand Thumb Rule
  4. DFleming’s Left-Hand Rule
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Correct answer: (D) Fleming’s Left-Hand Rule

Q45RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
The power in a circuit having voltage V and current I during time interval t is:
  1. AV/I
  2. BI × V
  3. C(I × t)/V
  4. DI/V
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Correct answer: (B) I × V

Q46RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
In a parallel circuit, how does the voltage across each resistor compare to the total voltage supplied by the battery?
  1. AIt is the same for each resistor.
  2. BIt is inversely proportional to the resistance.
  3. CIt is zero.
  4. DIt is divided according to the resistance values.
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Correct answer: (A) It is the same for each resistor.

Q47RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
An emf is induced whenever there is a change in the magnetic field linked with electric circuits. This is stated by the:
  1. AOhm's law
  2. BGravitation law
  3. CNewton's law
  4. DFaraday's law
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Correct answer: (D) Faraday's law

Q48RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)
A farmer wants to grow wheat with better baking quality and resistance to drought. Which two characteristics should be targeted in variety improvement?
  1. AHigher yield and wider adaptability
  2. BImproved quality and abiotic resistance
  3. CImproved quality and biotic resistance
  4. DWider adaptability and biotic resistance
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Correct answer: (B) Improved quality and abiotic resistance

Q49RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
An electric refrigerator has a power rating of 500 W and is used for 6 hours each day. If the cost of electrical energy is ₹4.00 per kilowatt-hour, what will be the total cost of operating the refrigerator for 30 days?
  1. A₹360
  2. B₹240
  3. C₹180
  4. D₹300
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Correct answer: (A) ₹360

Q50RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)
What is the reason why electrons move in a conducting wire when connected to a battery, but not when the wire is left untouched?
  1. AA battery creates a potential difference that sets electrons in motion
  2. BGravity acts on electrons in the wire
  3. CWire is made of copper
  4. DElectrons have intrinsic energy for movement
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Correct answer: (A) A battery creates a potential difference that sets electrons in motion

How to use these RRB JE General Science questions

Every question here was asked in a real RRB JE paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full RRB JE papers as timed tests to check your speed under exam conditions.

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