Free Electrostatics MCQs with Answers

• A. Charge
• B. Current
• C. Energy
• D. Power

Explanation: Energy can be measured in electron volts.

• A. Any amount of charge from infinity to that point
• B. A unit positive charge from infinity to that point
• C. Any amount of charge from any position to that point
• D. A unit negative charge from infinity to that point

Explanation: This is the definition of electric potential.

• A. 9 MV
• B. 900 MV
• C. 0.45 MV
• D. 4.5 MV

Explanation: The electric potential at the surface of a spherical charged object is given by the formula V = kQ/R, where:k (Coulomb's constant) = 9 ×…

• A. Charge
• B. Potential
• C. Capacity
• D. Density

Explanation: Potential difference drives current flow. If potentials are equal, there's no difference.

• A. I only
• B. II only
• C. both I and II
• D. neither I nor II

Explanation: Polar and non-polar dielectrics both improve capacitance.They reduce the electric field and increase charge storage capacity.Therefore…

• A. 1:8
• B. 1:5
• C. 1:2
• D. 5:1

Explanation: This is correct according to calculations

• A. 0.02 Joule
• B. 0.04Joule
• C. 0.025Joule
• D. 0.05Joule

Explanation: Correct. Energy (E) = (1/2)CV² E = (1/2) × (4 × 10⁻⁶ F) × (100 V)² E = (1/2) × 4 × 10⁻⁶ × 10⁴ E = 2 × 10⁻² J = 0.02 J

• A. Yes
• B. No
• C. Depends on its shape
• D. Depends on dielectric

Explanation: No - Correct: Metals cannot be used as dielectrics since they have free electrons that allow current to flow, unlike dielectric materials…

• A. Ohm
• B. Farad
• C. Coulomb
• D. Ampere

Explanation: Coulomb - Correct: Coulomb (C) is the SI unit of electric charge, defined as the charge transported by a current of one ampere in one…

• A. ½ μF
• B. 3/2 μF
• C. 5/2 μF
• D. 4/3 μF
• E. 2 μF

Explanation: 1/C=1/C1+1/C2 1/C=½ +¼ 1/C=¾ C=4/3. The effective capacitance is therefore 4/3 μF

• A. 1 Farad
• B. 10 Coulomb
• C. 1 Ohm
• D. 1 Coulomb
• E. 10 Ohm

Explanation: Potential difference=V=1 volt Current=I=1 Ampere According to Ohm's Law: V=IR Resistance R = Voltage V/ Current I R=1 volt / 1 Ampere R=1…

• A. Magnetic
• B. Electric
• C. Static
• D. All of these options are correct

Explanation: This option D suggests that all of the mentioned fields (magnetic, electric, and static) can be developed when a charge experiences a…

• A. Series
• B. Parallel
• C. Both of them
• D. None of them

Explanation: Correct option is A.For capacitors in series, the total capacitance can be found by adding the reciprocals of the individual…

• A. 4πε(b-a)
• B. None
• C. 4πεab
• D. 4πε/(b-a)

Explanation: The capacitance of a spherical capacitor is given by 4πε (ab)/(b-a).where a is the distance from the center to inner surfaceb is the…

• A. A/d
• B. Aεo/d
• C. Aεo/2d
• D. Aεo/d2

Explanation: The capacitance of a parallel plate capacitor is given by the equation:C = Aεo/dWhere C is the capacitance, A is the area of each plate, d…

• A. Parabolic
• B. Circular
• C. Parallel to v
• D. Parallel to E

Explanation: The path of the charged particle inside the magnetic field is circular.The force acting on the charged particle is given by the Lorentz…

• A. V - 2
• B. V - q
• C. qV - 2
• D. qV

Explanation: W= ΔK.E W=K.Ef - K.Ei (K.Ei = 0) W=K.Ef As we know that V=W/q W=qv K.E=qvHence,D is the correct option.

• A. Objects A and C possess charges of the same sign, but not B
• B. Objects A and C possess charges of opposite sign
• C. All three objects possess charges of the same sign
• D. One object is neutral

Explanation: As we know, the same charges repel each other and opposite charges attract each other.When A and B are brought together they repel each…

• A. 4 F
• B. 2 F
• C. F
• D. F/2

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

• A. 1 / 4(π E)
• B. 4 / (π E)
• C. 4(π E)
• D. π / 4E

Explanation: The following image shows the explanation for this question: