Electrostatics (NEET Physics): Questions 36 - 41 of 107

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Passage

Capacitor C 3 in the circuit is variable capacitor (its capacitance can be varied). Graph is plotted between potential differences V, (across capacitor C 1) versus C 3, Electric potential V 1 approaches on asymptote of 10 volts as C 3 → ∞

 Circuit Diagram - capacitors C2 and C3

Circuit Diagram - Capacitors C2 and C3

In figure, capacitors C2 and C3 connected in parallel and C1 connected in series. Capacitor C3 is variable capacitor.

Graph of V1→C3 for potential difference

Graph of V1→C3 for Potential Difference

Figure shows the curve between p. d (across capacitor C1) versus variable capacitor C3.

Question number: 36 (1 of 3 Based on Passage) Show Passage

» Electrostatics » Capacitors

MCQ▾

Question

The ratio of the capacitance C1/C2 will be

Choices

Choice (4) Response

a.

34

b.

43

c.

23

d.

32

Question number: 37 (2 of 3 Based on Passage) Show Passage

» Electrostatics » Capacitors

MCQ▾

Question

The ratio of energy stored in capacitor C 1 to that of total energy when C 3 → ∞ is

Choices

Choice (4) Response

a.

1

b.

Zero

c.

Data insufficient

d.

13

Question number: 38 (3 of 3 Based on Passage) Show Passage

» Electrostatics » Capacitors

MCQ▾

Question

The value of C 3 for which potential difference across C 1 will become 8V, is

Choices

Choice (4) Response

a.

4.5 C 1

b.

1.5 C 1

c.

2.5 C 1

d.

3.5 C 1

Question number: 39

» Electrostatics » Coulomb's Law

MCQ▾

Question

Two small balls each having the charge + Q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each thread will be,

Choices

Choice (4) Response

a.

1800,14πϵQ222

b.

1800,14πϵQ2L2

c.

1800,14πϵQ2(2L)2

d.

900,14πϵQ2(L)2

Question number: 40

» Electrostatics » Capacitors

MCQ▾

Question

Eight drops of mercury of equal radii possessing equal charges combine to form a big drop. Then the capacitance of bigger drop Compared to each individual small drop is

Choices

Choice (4) Response

a.

8 times

b.

2 times

c.

4 times

d.

32 times

Question number: 41

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

Three particles, each having a charge of 10µC are placed at the corners of an equilateral triangle of side 10 cm. What is the electrostatic potential energy of the system? ( k=14πϵ0 = 9xl0 9 Nm 2 /C 2)

Choices

Choice (4) Response

a.

Zero

b.

27 J

c.

Infinite

d.

100 J

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