Free Electric Potential MCQs with Answers
26 Electric Potential MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Electric potential is the work done per unit positive charge in bringing it from infinity to a point, while potential difference compares energy change between two points. Work includes potential due to point charges, superposition of scalar potentials, equipotential surfaces, and the relation between electric field and potential.
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- A. a vector measured in newtons per coulomb
- B. the work done per unit positive charge in bringing it from infinity to that point
- C. the force per unit charge
- D. the charge stored per unit voltage
Explanation: Potential is a scalar measured in volts, so potentials from several charges are added arithmetically with their signs rather than as…
Correct answer: the work done per unit positive charge in bringing it from infinity to that point- A. maximum
- B. zero
- C. negative
- D. equal to qV
Explanation: Work equals charge multiplied by the potential difference, and on an equipotential surface that difference is zero, so no work is done…
Correct answer: zero3. An electron volt is the energy gained by an electron when it moves through a potential difference of
- A. one volt
- B. one joule
- C. 1000 volts
- D. one coulomb
Explanation: Since energy is charge multiplied by potential difference, one electron volt equals 1.6 times 10 to the minus 19 joules, the magnitude of…
Correct answer: one volt- A. E equals V times d
- B. E equals V divided by d
- C. E equals d divided by V
- D. E equals V plus d
Explanation: For a uniform field, such as that between parallel plates, the intensity is the potential gradient, so a 100 V supply across plates 2 mm…
Correct answer: E equals V divided by d- A. increases, because work must be done against their repulsion
- B. decreases
- C. stays constant
- D. becomes negative
Explanation: Like charges repel, so pushing them together requires work and that work is stored as potential energy, which is why the system flies…
Correct answer: increases, because work must be done against their repulsion- A. Decreases
- B. increases
- C. remains the same
- D. becomes zero
Explanation: The potential energy of two charges is U = kq1q2/r. For two electrons, q1q2 is positive, so reducing their separation r makes U increase.
Correct answer: increases7. The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?
- A. Ke2/rn
- B. Ke2/rn2
- C. ÀKe2/rn
- D. ÀKe2/rn2
Explanation: The electric potential energy of two opposite charges is U = kq1q2/r. For an electron and a positive charge, q1q2 is negative, giving U =…
Correct answer: ÀKe2/rn- A. Kinetic energy increases
- B. P.E. between them increases
- C. P.E. between them decreases
- D. P.E. between tem does not change
Explanation: The electric potential energy of two like charges is U = kq1q2/r. Since both particles are protons and r decreases, their positive…
Correct answer: P.E. between them increases- A. 60V
- B. 6V
- C. 0.6 V
- D. 1.66 V
Explanation: The formula is: V = W/QGiven that the work done ( W ) is 10J and the charge ( Q ) is 6C, the potential difference ( V ) can be calculated…
Correct answer: 1.66 V- A. 1.6 x 10^-22 J
- B. 1.6 x 10^-20 J
- C. 1.6 x 10^-19 J
- D. 1.6 x 10^-16 J
Explanation: The energy of an electron after accelerating through a potential difference of 1,000 volts (V) can be calculated using the formula…
Correct answer: 1.6 x 10^-16 J- A. is constant
- B. varies directly as distance from centre
- C. varies directly as square of distance from the centre
- D. varies inversely as distance from centre
Explanation: The electric potential inside a hollow charged spherical conductor is constant.
Correct answer: is constant- A. work
- B. work done per unit charge
- C. electric field per unit charge
- D. electric force per unit charge
Explanation: The dimension of electric potential is represented as M1L2T-3I-1 which indicates that it has the same dimensions as that of work done per…
Correct answer: work done per unit charge- A. 0.32 μJ
- B. 0.32 nJ
- C. 0.32 pJ
- D. 0.32 fJ
Explanation: Change in Kinetic energy is equivalent to work done.We know that W = VqWhere W is the work done, V is the potential difference through…
Correct answer: 0.32 pJ- A. Electric flux
- B. Electric field
- C. Electric potential
- D. Electric intensity
Explanation: OPTION A: Electric flux is defined as: The number of lines of force that pass through the area placed in the electric field.OPTION B: An…
Correct answer: Electric potential- A. Infinity
- B. Zero
- C. Negative
- D. Positive
Explanation: Option B is correct since the electric potential at infinite distance is zero.Electric potential is the amount of electric potential…
Correct answer: Zero- A. 12.0 J.
- B. 16.5 J.
- C. 19.5 J.
- D. 27.0 J.
Explanation: The correct answer is option A: 12.0 J. The total energy dissipated in the circuit can be calculated using the formula: energy = charge x…
Correct answer: 12.0 J.- A. Increases.
- B. Decreases.
- C. Becomes zero.
- D. Remains the same.
Explanation: Electric potential energy is the energy a charge has due to its position in an electric field.
Correct answer: Increases.18. The electric potential difference between two points A and B in an electric field can be defined as:
- A. Work done in carrying a unit positive charge from infinity to B while keeping the charge in equilibrium.
- B. Work done in carrying a unit positive charge from A to infinity while keeping the charge in equilibrium.
- C. Work done in carrying a unit positive charge from A to B while keeping the charge in equilibrium.
- D. Work done in carrying a unit positive charge from A to B
Explanation: Option C is correct since it is the exact definition of potential difference between two points.
Correct answer: Work done in carrying a unit positive charge from A to B while keeping the charge in equilibrium.- A. Volts
- B. Coulomb
- C. Meter
- D. newton's
Explanation: Option A is correct since the correct unit of potential difference in volts.
Correct answer: Volts- A. Capacitance
- B. Potential difference between two points
- C. Intensity of electric field
- D. Resistance between two points
Explanation: Explanation:The workdone in moving a unit positive charge from one point to another against the electric field is equal to the potential…
Correct answer: Potential difference between two pointsElectric Potential MCQs: common questions
Are these Electric Potential MCQs free?
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There are 26 Electric Potential MCQs in the Physics bank, shown 20 to a page with the correct answer and an explanation on each.
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Yes. Each Electric Potential question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
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