NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 86 - 89 of 2142

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 86

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

An express train is moving with a velocity v 1. Its driver finds another train is moving on the same track in the same direction with velocity v 2. To escape collision, driver applies a retardation a on the train, the minimum time of escaping collision will be

Choices

Choice (4) Response

a.

t = Equation

b.

t 1 = Equation

c.

t1 = t-t1

d.

All of the above

Question number: 87

» Physics and Measurement » Dimensions of Physical Quantities

Assertion-Reason▾

Assertion (Ꭺ)

The time period of a pendulum is given by the formula, T = 2πEquation

Reason (Ꭱ)

According to the principle of homogeneity of dimensions, only that formula is correct in which the dimensions of L. H. S. is equal to dimensions of R. H. S.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

Question number: 88

» Physics and Measurement » SI Units

MCQ▾

Question

Wavelength of ray of light is 0.006 m. It is equal to

Choices

Choice (4) Response

a.

60 microns

b.

6 microns

c.

6000 microns

d.

All of the above

Question number: 89

» Kinematics » Motion in a Plane

MCQ▾

Question

A man throws balls with the same speed vertically upwards, one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time? (Given g = 9.8 m/s2)

Choices

Choice (4) Response

a.

At least 0.8 m/s

b.

Only with speed 19.6 m/s

c.

More than 19.6 m/s

d.

Any speed less than 19.6 m/s

f Page
Sign In