 # Physics Class 12th Chapter 2 Electrostatic Potential And Capacitance VVI Objective Questions | 12th Physics Objective Question Bihar Board English Medium

(A) High current

(B) High voltage

(C) High power

(D) High capacity

Ans:- (B)

### Q.2. A hollow sphere of radius 5 cm is charged to 10 volt. the potential at centre is

(A) Zero

(B) 10 volt

(C) Both a and b

(D) None of these

Ans:- (B)

(A) [ML²T⁻³A⁻¹]

(B) [MLT⁻³A⁻¹]

(C) [MLT⁻³A⁻²]

(D) [ML²T⁻³A⁻²]

Ans:- (A)

(A) 400 volt

(B) 600 volt

(C) 800 volt

(D) 900 volt

Ans:- (A)

(A) XY Plane

(B) XZ Plane

(C) YZ Plane

(D) Anywhere

Ans:- (C)

### Q.6. If 1000 identical droplets is having capacity 5μF combine to form a big drop than capacity of big drop is

(A) 50μF

(B) 100μF

(C) 20μF

(D) None of these

Ans:- (A)

### Q.7. If a proton is brought near another proton then its potential energy

(A) Increases

(B) Decreases

(C) Remains unchanged

(D) None of these

Ans:- (A)

(A) 3KJ

(B) 10KJ

(C) 100KJ

(D) 5KJ

Ans:- (A)

(A) Zero

(B) 2V₀

(C) V₀/2

(D) -V₀

Ans:- (C)

(A) W=ME(1-cosθ)

(B) W=MEtanθ

(C) W=MEsecθ

(D) W=ME

### Q.11. 1 eV is equal to

(A) 1J

(B) 1.6×10⁻¹⁹J

(C) 1.6×10⁻¹³J

(D) None of these

Ans:- (B)

(A) Vm⁻¹

(B) NC

(C) Vm

(D) Fm⁻¹

Ans:- (D)

### Q.13. Vm⁻¹ is the SI unit of

(A) Electric field

(B) Potential

(C) Capacitance

(D) Charge

Ans:- (A)

### Q.14. Debye is the unit of

(A) Charge

(B) Potential

(C) Electric dipole moment

(D) None

Ans:- (C)

(A) 10

(B) 20

(C) 5

(D) 2

Ans:- (A)

### Q.16. The capacity of a conductor is inversely proportional to

(A) Area of plates

(B) Permittivity of medium between plates

(C) Distance between plates

(D) None of these

Ans:- (C)

### Q.17. A spherical conductor is charged. The electric field intensity at its centre will be

(A) ∞

(B) 0

(C) Both A and B

(D) None of these

Ans:- (B)

(A) 0

(B) ∞

(C) 1

(D) -1

Ans:- (B)

(A) q×∈₀

(B) q/∈₀

(C) ∈₀/q

(D) q²/∈₀

Ans:- (B)

### Q.20. If a dielectric is placed between two plates of a parallel plate capacitor, the value of capacitance

(A) Increases

(B) Remains constant

(C) Decreases

(D) None of these

Ans:- (A)

Q.21. The nature of capacity of electrostatic capacitor depends on

(A) shape

(B) size

(C) thickness of plates

(D) area

Ans:- (D)

Q.22. The electric potential of the Earth is considered to be

(A) positive

(B) negative

(C) zero

(D) none of these

Ans:- (C)

Q.23. A capacitor of capacitance 6.0 μF is charged at 100 volt. The energy  stored in the capacitor is

(A) 0.6 Joule

(B) 0.06 Joule

(C) 0.03 Joule

(D) 0.3 Joule

Ans:- (C)