NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 295 - 298 of 2320

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Question number: 295

» Kinematics » Uniform and Non-Uniform Motion

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MCQ▾

Question

The total mass of an elevator with a 50 kg man in it is 500 kg. This elevator moving upward with a speed of 8 m/sec, is brought to rest over a distance of 16m. The tension T in the cables supporting the elevator and the force exerted on the man by the elevator floor will respectively be

Choices

Choice (4)Response

a.

620 N, 7800 N

b.

7800 N, 390 N

c.

624 N, 3900 N

d.

3900 N, 390 N

Question number: 296

» Rotational Motion » Torque

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MCQ▾

Question

Find the torque of a force F =-3 i + j+5 k acting at the point r = 7 i + 3 j + k

Choices

Choice (4)Response

a.

14i - 38j + 16k

b.

-21i + 3j + 5k

c.

4i + 4j + 6k

d.

-l4i + 38j -16k

Question number: 297

» Electrostatics » Electric Potential

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MCQ▾

Question

For spherical symmetrical charge distribution, variation of electric potential with distance from center is given in and ,

Curve of potential → distance (r)

Curve of Potential → Distance (R)

Then which option are correct:

(1) Total charge within 2R 0 is q

(2) Total electrostatic energy for is non-zero.

(3) At electric potential is discontinuous

(4) There will be no charge anywhere except at

Select the correct answers and mark it according to the following codes:

Choices

Choice (4)Response

a.

2 and 4

b.

1,2 and 4

c.

1 and 3

d.

1 and 2

Question number: 298

» Electrostatics » Electrostatic Potential Energy

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MCQ▾

Question

Three charges of equal value q’ are placed at the vertices of an equilateral triangle. What is the net potential energy, if the side of equilateral triangle is l?

Choices

Choice (4)Response

a.

b.

c.

d.

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