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 42 of 42
- A. maximum
- B. minimum
- C. Zero
- D. positive as well as negative
Explanation: The surface has an equal number of positive and negative charges, so the net charge will be zero.
Correct answer: Zero- A. Gravitational
- B. Electric field
- C. Magnetic field
- D. All the above
Explanation: A conservative field is a type of vector field in physics where the work done by a force in moving an object from one point to another is…
Correct answer: All the above- A. Its size decreases
- B. Its size increases
- C. No change
- D. None of the above
Explanation: When a soap bubble is charged, either positively or negatively, the like charges spread over its surface due to electrostatic forces.
Correct answer: Its size increases- A. X had a greater charge than Y
- B. Y had a greater charge than X
- C. Parallel but opposite
- D. Parallel, opposite and folded spirally.
Explanation: The correct answer is that X had a greater charge than Y. This conclusion is drawn from the observation that after the electric field was…
Correct answer: X had a greater charge than Y- A. Every where
- B. Only at the center of shell
- C. Only inside the shell
- D. Only one side of the shell
Explanation: Gauss's Law shows that the electric field everywhere inside a spherical shell of uniform charge density is 0.
Correct answer: Only inside the shell- A. Energy/farad
- B. Energy/ coulomb
- C. Energy/ volume
- D. Energy/volt
Explanation: The dimensions of the expression is M L-1 T-2 , which are also the dimensions of Energy/Volume½ 𝜺 0E^2𝜺i s the permittivity of free…
Correct answer: Energy/ volume- A. Negative and uniform over the surface of the sphere
- B. Zero
- C. Negative and at the point on the sphere closest to the point charge
- D. Negative and distributed non-uniformly over the enitre surface of the sphere
Explanation: If a positive point charge is placed outside a neutral conducting sphere, the net charge on the sphere will still be neutral.
Correct answer: Zero- A. 9.6 × 10^-19J
- B. 1.6 ×10^-19 J
- C. 3.2 ×10^-19 J
- D. 6.9 × 10^-19 J
Explanation: K.E = (1.6 ×10^-19) × (C×V) As K.E = (1.6×10^-19) (2×3) = 9.6 × 10^-19 JA.9.6 × 10^-19 J: This is the correct answer, obtained by using…
Correct answer: 9.6 × 10^-19J- A. 1.6 × 10^-18J
- B. 1.6 × 10^-17J
- C. 100J
- D. 100 electron volt
Explanation: Kinetic Energy = Work done = Q x V = 1.6×10−19×100=1.6×10−17 Joules. This option is correct as seen from the following relation.
Correct answer: 1.6 × 10^-17J- A. Each coulomb of charge from the battery supplies 9.0J of electrical energy to the whole circuit
- B. The battery supplies 9.0J to an external circuit for each coulomb of charge
- C. The potential difference across any component connected to the battery will be 9.0V
- D. There will always be 9.0V across the battery terminals
Explanation: The correct answer is Option A. A battery marked as 9.0V means it provides 9.0 joules of energy per coulomb of charge.
Correct answer: Each coulomb of charge from the battery supplies 9.0J of electrical energy to the whole circuit- A. 40 eV
- B. 40 KeV
- C. 40 MeV
- D. Zero
Explanation: A K.E is equal to EPE i.e qAV so 2e x 20V= 40 eVAs it is numerical, it can have only one possible answer.
Correct answer: 40 eV