NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2141 - 2145 of 2184

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Question number: 2141

» Rotational Motion » Conservation of Angular Momentum

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Appeared in Year: 2017

MCQ▾

Question

Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities . They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2142

» Kinetic Theory of Gases » Kinetic Energy and Temperature

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Appeared in Year: 2017

MCQ▾

Question

A gas mixture consists of of and of at temperature . Neglecting all vibrational modes, the total internal energy of the system is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2143

» Current Electricity » Resistances of Different Materials

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Appeared in Year: 2017

MCQ▾

Question

The resistance of a wire is ohm. If it is melted and stretched to times its original length, its new resistance will be –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2144

» Physics and Measurement » Fundamental and Derived Units. Least Count

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MCQ▾

Question

The least count of a spherometer is given by

Choices

Choice (4) Response

a.

b.

c.

d.

Both b. and c. are correct

Question number: 2145

» Physics and Measurement » Technology and Society

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MCQ▾

Question

Biot-Savart law indicates that the moving electrons ) produce a magnetic field such that

Choices

Choice (4) Response

a.

It is along the line joining the electron and point of observation.

b.

c.

d.

It obeys inverse cube law.