1 |
If the period of oscillation of mass (M) suspended from a spring is 2s, then the period of mass 4M will be |
1 s
2 s
3 s
4 s
|
2 |
If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will |
Increase
Decreases
Remain the same
First 'A' then 'B'
|
3 |
In which case dose the potential energy decreases? |
On compressing a spring
On stretching s spring
One moving a body against gravitational force
One the rising of an air bubble in water
|
4 |
Which one of the following is a simple harmonic motion? |
Wave moving through a string fixed at both ends.
Earth spinning about its own axis
Ball bouncing between two rigid vertical walls
Particle moving in a circle with uniform speed.
|
5 |
Blood has a density |
Equal to water
Greater then water
Lesser then water
None of these
|
6 |
The smooth or steady stream-line flow is know as |
Laminar flow
Turbulent flow
Both a and b
None of the above
|
7 |
According to Stoke's law drag force depends on |
Initial velocity
Final velocity
Terminal velocity
Instantaneous velocity
|
8 |
With the increase of temperature viscosity |
Increase
Decrease
Remains same
Doubles
|
9 |
Ball pen function on the principle of |
Viscosity
Boyle's law
Gravitational force
Surface tension
|
10 |
A person standing near the track of a fast moving train has tendency to fall towards it because of |
Vibration due to motion of train
Gravitation force of attraction between person and trains
The high speed of train
Some other effect
|
11 |
Surface tension of water is due to |
Inter molecular attraction
Intermolecular spaces
Inter molecular repulsion
None of above
|
12 |
Bernoulli's equation is based upon law of conservation |
Mass
Momentum
Energy
None of these
|
13 |
The terminal velocity of a small size spherical body of radius R moving in a fluid varies as |
R
R<sup>2</sup>
1/R
(1/R)<sup>2</sup><br>
|
14 |
The velocity of falling raindrops attains limited value because of |
Up thrust of air
VIscous force exerted by air
Surface tension effect
Air currents atmosphere
|
15 |
A person standing on a rotating platform has his hands lowered He suddenly outstretches his arms.The angular momentum |
Becomes zero
Increases
Decreases
Remains the same
|