Physics - Online Test

Q1. Which of the following is / are a fossil fuel? i. Tar ii. Coal iii. Petroleum
Answer : Option C
Explaination / Solution:
No Explaination.


Q2. In hot summer after a bath, the body’s
Answer : Option A
Explaination / Solution:
No Explaination.


Q3. Which software is used to create animation ?
Answer : Option D
Explaination / Solution:
No Explaination.


Q4. The speed of light in an isotropic medium depends on,
Answer : Option B
Explaination / Solution:

c = vλ, v is independent of medium

Q5.  A particle of mass m is moving with speed u in a direction which makes 60° with respect to x axis. It undergoes elastic collision with the wall. What is the change in momentum in x and y direction?


Answer : Option A
Explaination / Solution:
No Explaination.


Q6. The position of an object moving in a straight line can be specified with reference to
Answer : Option A
Explaination / Solution:

To describe motion along a straight line, we can choose an axis, say X-axis, so that it coincides with the path of the object. We then measure the position of the object with reference to a conveniently chosen origin, say O, Positions to the right of O are taken as positive and to the left of O, as negative.

Q7. According to Maxwell’s equations
Answer : Option B
Explaination / Solution:
No Explaination.


Q8. A plane glass is placed over a various coloured letters (violet, green, yellow, red) The letter which appears to be raised more is,
Answer : Option D
Explaination / Solution:

The refractive index (n) of the glass is different for different colours. For violet n is high. ∴ Violet travel with low speed, so deviation is high.

Q9. In wave propagation
Answer : Option C
Explaination / Solution:

because in wave propagation particles only moves in perodic motion, particles get collide with their neighbouring particles then transfer energy to them and comes back to their normal stage. Now next particle which gain energy get into excited state and starts moving periodically and get collide to next adjacent particle and so on. Thus in wave propagation particles only transfer their kinetic energy and momentum. Hence particles does not move therefore there is no flow of matter but there is movement of disturbance.

Q10. In a simple harmonic oscillation, the acceleration against displacement for one complete oscillation will be
Answer : Option D
Explaination / Solution:
No Explaination.