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.
Last updated
Read the Electrostatics notesFree MDCAT chapter notes with key terms831 questions · page 37 of 42
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Following is the solution to this question in the image:
Correct answer: Option A- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Following is the solution to this question in the image:
Correct answer: Option B- A. 3.20 µF
- B. 7.80 µF
- C. 3.90 µF
- D. 2.16 µF
Explanation: Following is the solution to this question:
Correct answer: 3.20 µF- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Following is the solution to this question:
Correct answer: Option A- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The net potential of the sphere due to the induced charge is zero. Therefore potential is due to the point charge only which is equal to…
Correct answer: Option B- A. 12
- B. 14
- C. 16
- D. 18
Explanation: Electric Potential = kq / r Where: k= 9 x 109 Nm2C-2 q = 2nC = 2 x 10-9 C r = (1, 0, 0) = 1m Electric Potential = (9 x 109) x (2 x 10-9) /…
Correct answer: 18- A. 2.5
- B. 2.6
- C. 2.7
- D. 2.8
Explanation: Explanation is given below: For the second point (-2,3,3) meters, the distance (r2) is 4 meters.
Correct answer: 2.7- A. Depends on the maximum area of the capacitor
- B. Depends on the maximum resistance offered
- C. Depends on the maximum electric field
- D. Depends on the maximum current passing through the capacitor
Explanation: The maximum energy that can be desirably stored in a capacitor depends on the maximum electric field that the dielectric can withstand…
Correct answer: Depends on the maximum electric field- A. 240V
- B. 200V
- C. 220V
- D. 120V
Explanation: Capacitors are in series. C = (1/2 + 1/4 + 1/6)-1, therefore, C= (12/11) F. Q =C x V = 220 x ( 12/11) = 240C.
Correct answer: 120V- A. High
- B. Low
- C. Zero
- D. Cannot be determined
Explanation: The initial current of a capacitor is very high because the voltage source will transport charges from one plate of the capacitor to the…
Correct answer: High- A. ƹ, F
- B. ƹ/F
- C. F/ƹ
- D. ƹ,
Explanation: Electric force in air: F = q1q2 / 4πϵor2 (where ϵo is the permitivity in air) Electric force in medium: F' F' = q1q2 / 4πϵoϵrr2 (where ϵr…
Correct answer: F/ƹ- A. 1.6 x 10^-19 C
- B. -3.2 x 10^-19C
- C. 3.2 x 10^-19C
- D. Neutral
Explanation: If two electrons are removed from a conductor the charge on it equal to 2 protons.
Correct answer: 3.2 x 10^-19C- A. 60N
- B. 40N
- C. 30N
- D. 15N
Explanation: According to Coulomb's Law: Fe ∝ 1 / r2 {provided the charges remain the same} r1 = r F1 = 120 N r2 = 2r1 = 2r F2 ∝ 1 / (2r)2 ==> F2 ∝ 1 /…
Correct answer: 30N- A. Increases
- B. Remains same
- C. Decreases
- D. May increase or decrease depending upon magnitude of charge
Explanation: a) When a positive charge is moved against an electric field, its potential energy increases.
Correct answer: Increases- A. Neutrons
- B. X-rays
- C. Y-rays
- D. None
Explanation: None of the options from a, b and c are charged. Therefore, they cannot be deflected by electric fields.
Correct answer: None- A. Electric intensity due to different charge configuration
- B. Electric intensity due to positive charge only
- C. Electric intensity due to negative charge only
- D. None of these
Explanation: (a) Electric intensity due to different charge configuration: Gauss's law can be used to calculate the electric field or electric…
Correct answer: Electric intensity due to different charge configuration- A. VA=VB=VC
- B. VA=VB<VC
- C. VA=VB>VC
- D. VA>VB=VC
Explanation: The correct option is c) VA=VB>VC. In a region of uniform electric field E, the electric potential at point A and point B will be equal…
Correct answer: VA=VB>VC- A. Resistor
- B. Good conductor
- C. Insulator
- D. Semi-Conductor
Explanation: So electric material can be good conductor. A good conductor is a material that allows electric current to flow through it easily.
Correct answer: Good conductor- A. Rapidly
- B. Exponentially
- C. Lineraly
- D. Logarithmically
Explanation: A capacitor charging and discharging exponentially.
Correct answer: Exponentially- A. Electric flux
- B. Electric intensity
- C. Electric potential
- D. All of above are same
Explanation: Force per unit charge is equal to electric field intensity
Correct answer: Electric intensity