Free Electrostatics MCQs with Answers
831 Electrostatics MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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Read the Electrostatics notesFree MDCAT chapter notes with key terms831 questions · page 5 of 42
- A. no direction.
- B. direction along the area of surface.
- C. direction along the electrostatic force.
- D. direction making an angle of 45o with force.
Explanation: Electric field intensity is defined as the electrostatic force experienced by a unit positive charge.
Correct answer: direction along the electrostatic force.- A. Zero between the plates
- B. Stronger near the plate P
- C. Stronger near the plate Q
- D. Uniform between the plates
Explanation: The correct answer is that the intensity of the electric field is uniform between the plates.
Correct answer: Uniform between the plates- A. 8.0 x 10^-22 N
- B. 3.2 x 10^-17 N
- C. 2.0 x 10^2 N
- D. 1.2 x 10^21 N
Explanation: The correct answer is Option B: 3.2 × 10-17 N. To calculate the electrostatic force on an electron, we use the formula F = qE, where q is…
Correct answer: 3.2 x 10^-17 N- A. qE/m
- B. qEm
- C. q/Em
- D. m/qE
Explanation: The equation for the acceleration of a charged particle in a uniform electric field isa = q E / m ,wherea is the acceleration,q is the…
Correct answer: qE/m- A. E=0,V=0
- B. E=0,V≠ 0
- C. E≠0,V=0
- D. E≠0,V≠0
Explanation: In summary, the correct answer is E=0, V≠0, because at the center of the square, the electric field vectors cancel out due to symmetry…
Correct answer: E=0,V≠ 0- A. Increase
- B. Decrease
- C. Remains constant
- D. Be zero
Explanation: When an insulating slab, also known as a dielectric, is placed between two charges, the force between them will generally decrease.
Correct answer: Decrease- A. N - m / C²
- B. C² N - 1m^-²
- C. C² / (N - m)²
- D. C² / N - m
Explanation: SI unit of permittivity of free space is:C2N−1m−2.
Correct answer: C² N - 1m^-²- A. Never cross each other
- B. Can cross each other
- C. Depends on the shape of charge
- D. Not enough information is available
Explanation: Electric lines of force never intersect each other because at the point of intersection, two tangents can be drawn to the two lines of…
Correct answer: Never cross each other89. Electric Flux through the surface of a sphere which has constant charge at its center depends on:
- A. The radius of the sphere
- B. The surface area of the sphere
- C. The amount of charge inside the sphere
- D. The amount of charge outside the sphere
Explanation: As per Gauss's theorem in electrostatics, the electric flux through a surface depends only on the amount of charge enclosed by the…
Correct answer: The amount of charge inside the sphere- A. electricity.
- B. electrostatic.
- C. electromagnetism.
- D. electromagnetic induction.
Explanation: Ink-jet printers operate by ejecting tiny ink droplets onto paper. Many inkjet printers utilize electrostatic principles to precisely…
Correct answer: electrostatic.- A. electric field.
- B. magnetic field.
- C. electromagnetic field.
Explanation: A) Electric field: A charged particle at rest creates an electric field in the space around it.
Correct answer: electric field.- A. A
- B. B
- C. C
- D. D
Explanation: All arrows are directed inward toward the negative charge. This is the correct representation because electric field lines terminate on…
Correct answer: B- A. Concentrated at the centre of the sphere
- B. Distributed on the inner surface of the sphere
- C. Concentrated inside and outside of the sphere
- D. Distributed on the outer surface of the sphere
Explanation: The correct answer is that the positive charges Q are distributed on the outer surface of the sphere.
Correct answer: Distributed on the outer surface of the sphere94. The total number of electric field lines of forces passing through a unit area is called electric
- A. flux.
- B. field.
- C. intensity.
- D. potential.
Explanation: The correct answer is 'flux.' In electromagnetism, the total number of electric field lines passing through a unit area is referred to as…
Correct answer: flux.- A. electric flux.
- B. magnetic flux.
- C. electric dipole.
- D. magnetic intensity.
Explanation: When positive and negative charges in a conductor are displaced by an electric field, it creates electric flux.
Correct answer: electric flux.- A. area of the surface.
- B. nature of the surface
- C. intensity of the electric field
- D. direction of the surface relative to the electric field
Explanation: The correct answer is Option D: direction of the surface relative to the electric field.
Correct answer: direction of the surface relative to the electric field- A. Zero.
- B. Positive.
- C. Negative.
- D. Undetermined.
Explanation: Gauss's Law states that the net electric flux through a closed surface is equal to the net charge enclosed divided by the permittivity of…
Correct answer: Zero.- 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