NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 373 - 376 of 2320

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Question number: 373

» Electrostatics » Electric Potential

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MCQ▾

Question

In a hydrogen atom, the electron revolves around the nucleus in an orbit of radius 0.53 x 10 -10 m. Then the electrical potential produced by the nucleus at the position of the electron is

Choices

Choice (4)Response

a.

-27.2V

b.

27.2V

c.

13.6V

d.

-13.6V

Question number: 374

» Laws of Motion » Force and Inertia

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Question

A string of length 1 m is fixed at one end and carries a mass of 100 gm at the other end. The string makes 2/jt revolutions per second about a vertical axis through the fixed end. The angle of inclination of the string with the vertical, and the linear velocity of the mass will respectively be - (in M. K. S. system)

Choices

Choice (4)Response

a.

50°14′, 3.16

b.

52°14′, 3.16

c.

50°14′, 1.6

d.

52°14′, 1.6

Question number: 375

» Electrostatics » Capacitors

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Question

A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved further apart by means of insulating handles, then

Choices

Choice (4)Response

a.

The capacitance increases

b.

The charge on the capacitor increases

c.

The voltage across the plates decreases

d.

The electrostatic energy stored in the capacitor increases

Question number: 376

» Kinematics » Uniform and Non-Uniform Motion

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MCQ▾

Question

A force of ( ) N acted on a body of mass 10 kg. The displacement after 10 sec, if it starts from rest, will be -

Choices

Choice (4)Response

a.

70 m along with x axis

b.

10 m along with x axis

c.

50 m along with x axis

d.

All of the above

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