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 38 of 42
- A. Reamain same
- B. Initially maximum then decrease to zero
- C. Become zero then increase maximum
- D. Remain zero
Explanation: During charging of capacitor, maximum current flows through the resistor.
Correct answer: Initially maximum then decrease to zero- A. Imaginary
- B. Physical existing every where
- C. Physically existing near the charges
- D. Depends upon case
Explanation: An electric line of force is an imaginary line that is a continuous line or curve that we can draw in an electric field such tangent to it…
Correct answer: Imaginary- A. W/4
- B. W/2
- C. 2W
- D. 4W
Explanation: We know that the energy stored in a capacitor is given by: W=Q2 /2C Now, if the charge Q increases to 2Q, then the change in energy will…
Correct answer: 4W- A. 2V
- B. 5V
- C. 10V
- D. 20V
Explanation: The correct option is CGiven q=2C , F=2000N , d=10-2 Electric field = E = F/q = 2000/10-2=1000The potential difference V =E.d=1000 X 10-2…
Correct answer: 10V- A. 2.5 x 10^-8 C
- B. 10-3 C
- C. 103 C
- D. 4 x 10^3 C
Explanation: Option B is correct as: Q=CV Q= 5µF X 200V Q=1X10-3C
Correct answer: 10-3 C746. If the distance between the plates of parallel plates condenser is increased, its potential will:
- A. Remain same
- B. Increase
- C. Decrease
- D. Decrease exponentially
Explanation: Option C is correct as potential is inversely proportional to the distance between plates of parallel plates condenser so when the…
Correct answer: Decrease- A. A
- B. B
- C. C
- D. D
Explanation: Option A is correct as path PQRS is a closed path and work done in carrying a charge in closed path is zero.
Correct answer: A- A. C
- B. A
- C. D
- D. B
Explanation: Option A: The electric field lines look like a "C" shape, curving around the uncharged metal sphere, with the ends of the "C" directed…
Correct answer: C- A. 20N/C
- B. 500N/C
- C. 5N/C
- D. 250N/C
Explanation: Electric Field (E)=Potential Difference (V)/Distance between the Plates (d) Given: Potential Difference (V) = 10 volts Distance between…
Correct answer: 500N/C- A. Any two charges
- B. Point charges
- C. Both
- D. None
Explanation: The correct option is: c) Both This option suggests that Coulomb's law is applicable for both any two charges and point charges.
Correct answer: Both- A. 1/4th of its orignal value
- B. 1/8th of its orignal value
- C. 4 times of orignal value
- D. 8 times of its orignal value
Explanation: The force between two charges is directly proportional to product of magnitude of charges F =Kq1q2/r2 q1'=2q1 q2'=2q2 F' = (2q1)(2q2)/r2…
Correct answer: 4 times of orignal value- A. 6.3 x 10^-1J
- B. 6.3 x 10^-15J
- C. 6.3 x 10^-5V
- D. 1.3 x 10^-5J
Explanation: The solution is as follows:The electric potential energy between two point charges is equal to work done in carrying charge to that point…
Correct answer: 6.3 x 10^-5V- A. E
- B. E2
- C. I/E2
- D. E3
Explanation: The electrostatic energy density is proportional to E^2, where E is the electric field intensity.
Correct answer: E2- A. F
- B. 8F
- C. 4F
- D. 16F
Explanation: If the magnitude of each charge is doubled, then the force will be quadrupled.
Correct answer: 16F- A. 16N
- B. 64N
- C. 1N
- D. 32N
Explanation: Explanation is as follows: KQ1Q2/ r^2 = force on charges K*Q1*Q2/ 4^2= 4 KQ1Q2= 64 ------> equation : 1 now for distance = 1m force =…
Correct answer: 64N- A. 120V
- B. 12000V
- C. 1200V
- D. 12V
Explanation: The work done against an electric field is equal to the change in the electric potential energy of the charge.
Correct answer: 1200V- A. Decrease
- B. Remains unchanged
- C. Increase
- D. Become zero
Explanation: Option C is correct as When one electron is taken towards the other electron, then the electric potential energy of the system…
Correct answer: Increase- A. Electric field
- B. Capacity
- C. Energy
- D. Charge
Explanation: Option D is correct as The quantity that remains unchanged when a dielectric slab is introduced between the plates of a charged parallel…
Correct answer: Charge- A. 16 x 10^-5J
- B. 32 x 10^-6J
- C. 3.2 x 10^-4J
- D. 16 x 10^-4J
Explanation: The work done in placing a charge of 8 microcoulombs (μC) on a capacitor of capacitance 100 nanofarads (nF) is 3.2×10-4J .A microcoulomb…
Correct answer: 3.2 x 10^-4J- A. lies
- B. lying
- C. lied
- D. lay
Explanation: This option is correct because "lies" is the present tense form of the verb "lie," which means to be located or situated.
Correct answer: lies