Practice Questions answers set 3 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) If the number representing volume and surface area of a cube are equal, then the length of the edge of the cube in terms of the unit of measurement will be
(a)
(b)
(c)
(d)
Q-2) How much time will it take to perform 440 J of work at a rate of 11 W?
(a)
(b)
(c)
(d)
Q-3) Which physical quantity is represented by the ratio of momentum and velocity of the body?
(a)
(b)
(c)
(d)
Q-4) Thomas and Mary are playing carom board. They arrange the seeds in the vertical order. Thomas strikes on the seeds with the striker, with a great speed. He finds that, the stakes do not fall down. On the other hand, when he strikes the seeds with less speed, all the seeds of the stakes fell down. Which property of force this shows?
(a)
(b)
(c)
(d)
Q-5) Regarding mechanical energy, which of the following statements is/are correct?
- Kinetic energy of a body depends upon the direction of motion.
- When a body falls freely, its P.E. is converted into K.E.
- A body at rest may possess P.E.
(a)
(b)
(c)
(d)
Explanation:
Kinetic energy is a scalar quantity it does not have a direction.
Q-6) The sum of the change in kinetic and potential energy is always
(a)
(b)
(c)
(d)
Q-7) 1 kilowatt hour is equal to
(a)
(b)
(c)
(d)
Q-8) A missile is launched with a velocity less than escape velocity. The sum of its kinetic and potential energies is
(a)
(b)
(c)
(d)
Q-9) A truck, a car and a motorcycle have equal kinetic energies. If equal, stopping forces are applied and they stop after travelling a distance of X, Y and Z respectively, then
(a)
(b)
(c)
(d)
Q-10) A couple produces a
(a)
(b)
(c)
(d)
Explanation:
Two forces equal in magnitude but opposite in direction form a couple which tends to rotate the body.