CBSE
Multiple Choice QuestionsSpeed in kilometre per hour in S.I unit is represented as
KMPH
Kmhr-1
Kmh-1
kilometre/hour
time
distance
frequency
angular acceleration
A body starting from rest moves along a straight line with a constant acceleration. The variation of speed (v) with distance ( s ) is represented by the graph
A particle moving with velocity (1/10)th of light will cross a nucleus in about
10-8 s
10-12 s
10-47 s
10-21 s
Using mass (M), length (L), time (T) and current (A) as fundamental quantities, the dimension of permittivity is
[ M L-2 T2 A ]
[ M-1 L-3 T4 A2 ]
[ M L T-2 A ]
[ M L2 T-1 A2 ]
When a ball is thrown up vertically with velocity vo, it reaches a maximum height of h. If one wishes triple the maximum height then the ball should be thrown with velocity
vo
3vo
9vo
3/2 vo
A particle starts from rest and has an acceleration of 2 m/s2 for 10 sec. After that, it travels for 30 sec with constant speed and then undergoes a retardation of 4 m/s2 and comes back to rest. The total distance covered by the particle is
650 m
750 m
700 m
800 m
Two spheres of same size, one of mass 2 kg and another of mass 4 kg are dropped simultaneously from the top of Qutab Minar ( height ≈ 72 m ). When they are 1 m above the ground the two spheres have the same
momentum
kinetic energy
potential energy
acceleration
A person is standing in an elevator. In which situation he finds his weight less?
When the elevator moves upward with constant acceleration
When the elevator moves downward with constant acceleration
When the elevator moves upward with uniform velocity
When the elevator moves downward with uniform velocity
S.I unit of velocity is
ms
m sec-1
m hr-1
m/hr
