NEET Physics: Questions 372 - 375 of 2099

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Question number: 372

» Properties of Solids & Liquids » Calorimetry

MCQ▾

Question

Which principle is involved in the experiment to determine the specific heat of a liquid by the method of mixture?

Choices

Choice (4) Response
a.

Heat gained by solid = Heat lost by calorimeter and liquid.

b.

Heat lost by solid = Heat gained by calorimeter and liquid.

c.

Heat lost by solid and liquid = Heat gained by calorimeter.

d.

Heat gained by solid and calorimeter = Heat lost by liquid.

Question number: 373

» Electrostatics » Electric Potential

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

MCQ▾

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′, 1.6

c.

52°14′, 3.16

d.

50°14′, 1.6

Question number: 375

» Electrostatics » Capacitors

MCQ▾

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 electrostatic energy stored in the capacitor increases

b.

The voltage across the plates decreases

c.

The charge on the capacitor increases

d.

The capacitance increases

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