Electrostatics (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 8 - 10 of 13

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Question number: 8

» Electrostatics » Electric Potential

Appeared in Year: 2015

MCQ▾

Question

An ac voltmeter connected between points A and B in the circuit below reads 36 V. If it is connected between A and C, the reading is 39 V. The reading when it is connected between B and D is 25 V. What will the voltmeter read when it is connected between A and D? (Assume that the voltmeter reads true ems voltage value and that the source generates a pure ac. )

RLC - series circuit diagram

RLC - Series Circuit Diagram

In figure a RLC series circuit diagram is shown.

Choices

Choice (4) Response

a.

3361V

b.

481V

c.

31V

d.

61V

Question number: 9

» Electrostatics » Capacitors

MCQ▾

Question

Three identical parallel plate capacitors of capacitance 2 µF each are connected in series with a battery of emf, 10 V as shown. Q is the charge on the capacitor. If two of the capacitors are now filled with a dielectric of dielectric constant k, the amount of charge which will flow through the battery is (neglect internal resistance of the battery)

Circuit diagram of three capacitors and a battery

Circuit Diagram of Three Capacitors and a Battery

In figure a circuit diagram consist of three capacitors and a battery is shown.

Choices

Choice (4) Response

a.

Q2(k1)(k+1)

b.

Q(k1k+2)

c.

Q(k+2k2)

d.

2Q(k1)(k+2)

Question number: 10

» Electrostatics » Electrostatic Potential Energy

Appeared in Year: 2014

MCQ▾

Question

Consider a spherical shell of radius R with a total charge + Q uniformly spread on its surface (center of the shell lies at the origin x = 0). Two point charge, +q and – q are brought, one after the other, from far away and placed at x=a2 and x=+a2(a<R) , respectively. Magnitude of the work done in this process is

Choices

Choice (4) Response

a.

q24πε0a

b.

Qq4πε0a

c.

(Q+q)24πε0a

d.

zero

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