Free Electrostatics MCQs with Answers

• A. Series
• B. Parallel
• C. Closed circuit
• D. Open circuit

Explanation: When capacitors are connected in series, the total capacitance is less than any one of the series capacitors' individual capacitances.

• A. Distance between point charges
• B. Square of distance between point charges
• C. Cube of distance between point charges
• D. Product of magnitude of charges

Explanation: According to Coulomb's law, the force of attraction or repulsion between two charged bodies is directly proportional to the product of…

• A. Decrease
• B. Increase
• C. Becomes half
• D. Remains same

Explanation: If the total charge on the plates is kept constant, then the potential difference is reduced across the capacitor plates.

• A. Cp - Cv= R
• B. Cp+ Cv= R
• C. Cy -Cp= R
• D. R- Cv= Cp

Explanation: Taking into consideration a substance's ideal gas behaviour, the following link can be established: R is equal to Cp- Cv.

• A. Increases
• B. Decreases
• C. Remains same
• D. Becomes zero

Explanation: The positive charges within the dielectric are displaced minutely in the direction of the electric field, and the negative charges are…

• A. Electric field intensity
• B. Electric flux density
• C. Charge
• D. permittivity

Explanation: Gauss's law cannot be used to find permittivity (εo). The value of the permittivity of free space is a fundamental constant in…

• A. Particle charge
• B. Particle speed
• C. Plate separation
• D. Potential difference between the plates

Explanation: The force on a charged particle in a uniform electric field is given by:Force = qEWhere the electric field E between two parallel plates…

• A. Single layer
• B. Double layer
• C. Triple layer
• D. Quadruple layer

Explanation: To store electric charge, ultra-capacitors use the double-layer effect.

• A. 1200 J
• B. 800 J
• C. 300 J
• D. 0 J

Explanation: To find the potential difference (V) between two points in an electric field, you can use the formula: v=W/Q Where: V is the potential…

• A. Maximum
• B. Zero
• C. Negative
• D. Positive

Explanation: The correct electric field intensity inside a hollow charged sphere is B. Zero.

• A. Sum of the magnitude of charges
• B. Square of the distance between them
• C. Product of the magnitude of charges
• D. Cube of the distance

Explanation: Option C is correct. Coulomb's law states that the force is directly proportional to the product of the magnitude of charges (q1 * q2).

• A. Current
• B. Magnetic induction
• C. Emf
• D. Mutual inductance

Explanation: The correct statement is C. Emf. The quantity "Aepitit" has the same units as emf, which is volts (V).

• A. 1:5
• B. 1:25
• C. 1:3
• D. 1:1

Explanation: The magnitude of force on both charges is same. Hence the ratio will be 1:1.

• A. 1 coulomb
• B. 1 newton
• C. 1 watt
• D. 1 hp

Explanation: According to the formula for electrical power, Power (P) = Voltage (V) x Current (I).

• A. Power
• B. Charge
• C. Potential Difference
• D. Current

Explanation: The correct answer is Charge because the unit ampere.second represents a coulomb, which is the standard unit of electric charge.

• A. 20 V
• B. 10 V
• C. 5 V
• D. 0 V

Explanation: At the midpoint between two equal and opposite charges, the electric potential contributions from each charge are equal in magnitude but…

• A. 20 N
• B. 15 N
• C. 10 N
• D. 5 N

Explanation: In this problem, we start with a repulsive force of 10 N between two like charges in a vacuum.

• A. Current
• B. Voltage
• C. Force
• D. Energy

Explanation: The correct answer is Current, as the slope of the charge-time graph indicates how quickly charge is flowing into the capacitor, which is…

• A. F/16
• B. F/8
• C. F/4
• D. F/2

Explanation: According to Coulomb's Law, the force F between two point charges is given by the formula: F = k * (q1 * q2) / d^2, where k is the…

• A. Doubled
• B. Halved
• C. Unchanged
• D. Triple

Explanation: The capacitance (C) of a parallel-plate capacitor is given by the formula C = (ε₀ * A) / d, where A is the area of the plates, d is the…