Practice Gk quiz set 4 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) Time period of a simple pendulum inside a satellite orbiting earth is
(a)
(b)
(c)
(d)
Since, T = $2π√{l/g}$
but inside the satellite g = 0
So, T = ∞
Q-2) A particle is moving in a circular path of radius r. The displacement after half a circle would be
(a)
(b)
(c)
(d)
Q-3) For a particle revolving in a circular path, the acceleration of the particle is
(a)
(b)
(c)
(d)
Q-4) A rubber ball dropped from 24 m height loses its kinetic energy by 25%. What is the height to which it rebounds.
(a)
(b)
(c)
(d)
Q-5) Two persons do the same amount of work, one in 10 s and the other in 20 s. Find the ratio of the power used by the first person to that by the second person.
(a)
(b)
(c)
(d)
Q-6) If velocity of a body is twice of previous velocity, then kinetic energy will become
(a)
(b)
(c)
(d)
Q-7) A fan is moving around its axis, What will be its motion regarded as ?
(a)
(b)
(c)
(d)
Q-8) Consider the following statements :
- A person standing for a long time with a suitcase on his head does no work in terms of physics.
- There cannot be any displacement of an object in the absence of any force acting on it.
- The law of conservation of energy is valid in all situations and for all kinds of transformations.
Which of these statements is/are correct ?
(a)
(b)
(c)
(d)
Yes. If a particle is moving and there is no force on it, then it will continue to move with constant velocity.
Thus it will have displacement.
Q-9) Consider the following statements.
A 4-wheel vehicle moving in a sharp circular path at high speed will
- Overturn about its outer wheels
- Overturn about its inner wheels
- Skid outwards
- Skid inwards
Which of these statements are correct?
(a)
(b)
(c)
(d)
Q-10) A body weighs less at the equator than at the poles because:
- earth rotates about its axis.
- the ice cap at the poles increases gravitational pull.
- equatorial diameter is greater than the polar diameter.
- of some unknown facts.
Which of the statements given above is/are incorrect?
(a)
(b)
(c)
(d)
For a given point on the surface of the earth, g decreases as w increases.
Hence, the body weighs less at the equator than at the poles also equatorial diameter is greater than the polar diameter.
So according to g = ${GM}/{R^2}$ value of g decreases.