NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 290 - 294 of 2320

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Question number: 290

» Laws of Motion » Force and Inertia

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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.

101 m/s

b.

36.5 m/s

c.

64 m/s

d.

3.18 m/s

Question number: 291

» Kinematics » Average Speed and Instantaneous Velocity

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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 cm

b.

4.5 cm

c.

12 m

d.

4.5 m

Question number: 292

» Electrostatics » Coulomb's Law

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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.

Question number: 293

» Electrostatics » Capacitors

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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.

4 times

b.

8 times

c.

2 times

d.

32 times

Question number: 294

» Electrostatics » Electrostatic Potential Energy

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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? ( = 9xl0 9 Nm 2 /C 2)

Choices

Choice (4)Response

a.

27 J

b.

Zero

c.

Infinite

d.

100 J

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