NEST (National Entrance Screening Test) Physics: Questions 7 - 9 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. Unlimited Access for Unlimited Time! View Sample Explanation or View Features.

Rs. 100.00 or

How to register?

Question number: 7

» Kinematics » Projectile Motion

Edit

Appeared in Year: 2013

MCQ▾

Question

Two identical particles are projected horizontally in opposite directions with a speed of each from the top of a tall tower as shown. Assuming , the distance between them at the moment when their velocity vectors become mutually perpendicular is –

Two identical particles on top of a tower

Two Identical Particles on Top of a Tower

In figure two identical particles are placed on the travels.

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 8

» Dual Nature of Matter and Radiation » Particle Nature of Light

Edit

Appeared in Year: 2007

MCQ▾

Question

Electrons cannot remain confined in a nucleus. This is because –

Choices

Choice (4)Response

a.

Pauli’s exclusion principle forbids electrons to be bound together in the same nucleus.

b.

Electrons confined in a nucleus will, according to the uncertainty principle, have so much kinetic energy that even electron – proton attraction will not be able to hold them bound.

c.

The size of an electron is about , which is much bigger than the typical size of a nucleus .

d.

Electron – electron repulsion will dominate electron – proton attraction inside the nucleus.

Question number: 9

» Work, Energy and Power » Work Done

Edit

Appeared in Year: 2013

MCQ▾

Question

A particle of mass goes counterclockwise around a square path with vertices at in a force, . Here, and are positive constants. Consider the work done along the following paths:

(i)

(ii)

(iii)

(iv)

The work done is zero for –

Choices

Choice (4)Response

a.

Paths (ii) and (iv) only.

b.

Paths (ii), (iii) and (iv) only.

c.

Paths (i) and (ii) only.

d.

Paths (i), (iii) and (iv) only.

Developed by: