NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2140 - 2144 of 2320

Access detailed explanations (illustrated with images and videos) to 2320 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Unlimited Access for Unlimited Time! View Sample Explanation or View Features.

Rs. 600.00 or

How to register?

Question number: 2140

» Center of Mass » Centre of Mass of a Rigid Body

Edit

Appeared in Year: 2017

MCQ▾

Question

Which of the following statements are correct?

  1. Center of mass of a body always coincides with the centre of gravity of the body.
  2. Center of mass of a body is the point at which the total gravitational torque on the body is zero
  3. A couple on a body produce both translational and rotational motion in a body.
  4. Mechanical advantage greater that one means that small effort can be used to lift a large load.

Choices

Choice (4)Response

a.

2 and 3

b.

2 and 4

c.

3 and 4

d.

1 and 2

Question number: 2141

» Rotational Motion » Conservation of Angular Momentum

Edit

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

Edit

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

Edit

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

Edit
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

Developed by: