NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 405 - 409 of 2320

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Question number: 405

» Kinematics » Average Speed and Instantaneous Velocity

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MCQ▾

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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MCQ▾

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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MCQ▾

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

Question number: 409

» Electrostatics » Electric Field Due to a Point Charge

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Assertion-Reason▾

Question

Assertion (Ꭺ)

A point charge is brought in an electric field. The field at a nearby point will increase, whatever be the nature of the charge.

Reason (Ꭱ)

The electric field is dependent on the nature of charge.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

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