NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 404 - 408 of 2184

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Question number: 404

» Electrostatics » Electric Potential

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MCQ▾

Question

Identical point charges, each having +q charge, are fixed at each of the points x = x 0 , x = 3x 0 , x = 5x 0 ……… infinite, on the x-axis and an identical point charges, each having -q charge, are fixed at each of the points x = 2x 0 , x = 4x 0 , x = 6x 0 ……. infinite. Here x 0 is a positive constant. Potential at the origin due to the above system of charges is,

Choices

Choice (4) Response

a.

0

b.

c.

d.

Question number: 405

» Kinematics » Average Speed and Instantaneous Velocity

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Question

A ship is steaming towards east at a speed of 12 ms -1. A woman runs across the deck at a speed of 5 ms -1 in the direction at right angles to the direction of motion of the ship i. e. towards north. What is the velocity of the woman relative to sea?

Choices

Choice (4) Response

a.

5 m/s

b.

17 m/s

c.

13 m/s

d.

12 m/s

Question number: 406

» Rotational Motion » Torque

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Question

A wheel having moment of inertia 2 kg -m 2 about its vertical axis, rotates at the rate of 60 rpm about this axis. The torque which can stop the wheel’s rotation in 1 minute would be

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 407

» Electrostatics » Electric Potential

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MCQ▾

Question

How much kinetic energy will be gained by an α- particle in going from a point at 70V to another point at 50V?

Choices

Choice (4) Response

a.

0 eV

b.

40 keV

c.

40 MeV

d.

40 eV

Question number: 408

» Laws of Motion » Momentum

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Question

A boat of mass 1000 kg is moving with a velocity of 8 m/s. A person of mass 70 kg jumps into the boat. The velocity of the boat with the person will be –

Choices

Choice (4) Response

a.

7.71 cm/s

b.

74.8 m/s

c.

7.48 m/s

d.

77.1 cm/s