NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 287 - 291 of 2142

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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 → ∞

Question number: 287 (3 of 3 Based on Passage) Show Passage

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.

Question number: 288

MCQ▾

Question

An engine of mass 6 x 10 4 kg pulls a coach of mass 2 x 10 4 kg. Suppose that there is a resistance of 1 N per 100 kg acting on both coach and engine, and that the driving

Force of engine is 4800 N. The acceleration of the engine and tension in the coupling will respectively be

Choices

Choice (4) Response

a.

0.04 m/s 2, 20 N

b.

0.05 m/s 2, 1200 N

c.

400 m/s 2, 200 N

d.

0.09 m/s 2, 2000 N

Question number: 289

MCQ▾

Question

A 5 kg balls is swing in a vertical circle at the end of a cord 1 m long. The maximum speed at which it can swing if the cord can sustain maximum tension of 150 N will be –

Choices

Choice (4) Response

a.

64 m/s

b.

36.5 m/s

c.

3.18 m/s

d.

101 m/s

Question number: 290

MCQ▾

Question

A train has to negotiate a curve of radius 400 m. By how much should the outer rail be raised with respect to inner rail for a speed of 48 km/hr. The distance between the rails is 1 m.

Choices

Choice (4) Response

a.

12 m

b.

12 cm

c.

4.5 m

d.

4.5 cm

Question number: 291

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.

b.

c.

d.

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