NDA PHYSICS QUIZ - 35

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Question 1:

A spherical mirror whose reflecting surface is curved outwards is called a _____________ mirror.

Question 2:

A ball of mass 150 g moving with an acceleration 20 m/sis hit by a force, the force acts on it for 0.1 sec. What will be the impulsive force applied on the ball?

Question 3:

Which quantity remains conserved in the motion of planet?

Question 4:

  1. The graph given below shows the positions of a body at different times. Which part of the graph represent that the body is at rest ?
    (i) A to B
    (ii) B to C and
    (iii) C to D.
    Motion Class 9 Extra Questions Science Chapter 8 14

Question 5:

It is difficult to walk on an oily floor because-

Question 6:

A bullet of mass 20 g is fired in the horizontal direction with a velocity 150 m/s from a pistol of mass 1 kg. Calculate the recoil velocity of the pistol?

Question 7:

Sliding friction is

Question 8:

How much work is done in moving a charge of 4 C across two points having a potential difference of 28 V?

Question 9:

Astronauts cannot stand upright in a vacuum because-

Question 10:

At absolute zero, Germenium (Ge) acts as-