NEST (National Entrance Screening Test) Physics: Questions 30 - 33 of 58

Access detailed explanations (illustrated with images and videos) to 58 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 100.00 or

How to register?

Question number: 30

» Magnetic Effects of Current and Magnetism » Ampere's Law

Edit

Appeared in Year: 2015

MCQ▾

Question

A tiny bar magnet is kept close to a long current carrying straight wire placed along the axis. When the centre of the magnet is at and it is oriented along the axis, it experiences –

Choices

Choice (4) Response

a.

Not net force but a net torque.

b.

Neither net force nor net torque.

c.

A net force and a net torque

d.

A net force but not net torque

Question number: 31

» Thermodynamics » Thermal Equilibrium

Edit

Appeared in Year: 2015

MCQ▾

Question

A body of mass with specific heat at temperature is brought into contact with an identical body at temperature . The system is isolated from the surroundings during the process. The change in entropy of the system is –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 32

» Wave Optics » Young's Double Slit Experiment

Edit

Appeared in Year: 2015

MCQ▾

Question

In a Young double slit experiment, the distance between the slits is and the distance of the screen from the slits is . An infrared monochromatic light is used to produce an interference pattern with fringe width . If the light source is replaced by an electron source to produce the same fringe width then the speed of the electrons is approximately –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 33

» Kinematics » Projectile Motion

Edit

Appeared in Year: 2015

MCQ▾

Question

Two balls are projected at different angles from the same place and with the same initial speed of . Both balls have the same range of . The difference in their times of flight is close to –

Choices

Choice (4) Response

a.

b.

c.

d.