Class 12 Physics · Chapter 4 · Test 1
Potential Difference and Energy
40 MCQs
40 questions · 35 min · 40 marks
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Sample questions
The first 5 of 40. Try each one, then tap to see the answer.
Question 1
Electrostatics refers to the phenomena arising from:
- AStationary electric charges
- BMoving electric charges only
- CMagnetic fields
- DAlternating currents
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Answer: A
Electrostatics deals with stationary electric charges and the forces fields and potentials they produce.
Question 2
The electrostatic force between two point charges is found by applying:
- AOhm's law
- BCoulomb's law
- CFaraday's law
- DNewton's law of cooling
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Answer: B
The text applies Coulomb's law F = (1/4πε0) q1q2/r² to find the electrostatic force.
Question 3
Electric potential difference is the work done per unit:
- AMass
- BTime
- CCharge
- DDistance
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Answer: C
Potential difference is the work done per unit charge in moving a charge between two points.
Question 4
The SI unit of electric potential difference is the:
- AFarad
- BVolt
- COhm
- DCoulomb
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Answer: B
The SI unit of potential difference is the volt and one volt equals one joule per coulomb.
Question 5
The electric field in terms of potential gradient is:
- AE = ΔV/Δr
- BE = Δr/ΔV
- CE = -ΔV/Δr
- DE = V × r
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Answer: C
The electric field is the negative of the rate of change of potential with distance.
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