6162.In microphone
Electrical energy into sound energy
Sound energy into electrical energy
Magnetic energy into sound energy
None of the above
6164.When the speed of a body is doubled, its kinetic energy becomes
quadruple
half
double
one-fourth
6166.It is easier to roll a barrel than to puss it because
the full weight of the barrel comes into play when it is pulled
of a reason other than those mentioned
the surface area of the barrel in contact with the road is more in the case of pulling
rolling friction is much less than sliding friction
6167.If an apple is released from an orbiting spaceship, it will
fall towards the earth
move at a higher speed
move along with the spaceship at same speed
move at a lower speed
6168.The gravitational force with which sun attracts the earth is
more than the force with which the earth attracts the sun
constant throughout the year
less than the force with the earth attracts the sun
same as the force with which earth attracts the sun
6169.The weight of a body is
the same everywhere on the surface of the earth
maximum at the equator
maximum at the poles
more on the hills than in the plains
6170.A ball tied with a string to a rotating shaft revolves at uniform speed. As the shaft is suddenly bought to rest the string starts getting round the shaft with the angular velocity of the ball
decreasing
increasing
remaining constant
becoming zero
6171.A horse pulling a tonga moves forward due to the force exerted by
the tonga on the horse
the horse on the tonga
the horse on the ground with his feet
the ground on the horse`s feet
6172.The period of revolution of a geostationary satellite is
changing continiously
365 days
30 days
24 hours