1 |
Biomas is a potential source of |
Renewable energy
Non renewable energy
Botha a and b
Tidal energy
|
2 |
Which one is renewable source of energy. |
Coal
Uranium
Biomass
Natural gas
|
3 |
Original source of energy for biomass is |
Earth
Star
Moon
Sun
|
4 |
A body has P.E. = mgh, when it is at height 'h' from the ground. At the point at the distance 'x' below from the top its P.E. with |
mgh
mgx
mg(x-h)
None of these
|
5 |
Energy dissipated usually appears as |
P.E.
Heat Energy
Chemical energy
Nuclear Energy
|
6 |
A body of mass 1.0 Kg dropped from the top of a tower of highest 50 m, what will be its K.E. 10 m below the top |
400 J
490 J
49 J
98 J
|
7 |
The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1 |
250 J
125 J
2500 J
10,000 J
|
8 |
If velocity 'v' of an object is double, then K.E. because. |
Remain same
Sixteen times
Double
Four times
|
9 |
Which one is a conservative force |
Elastic spring force
Air resistance
Frictional force
Tension in the spring
|
10 |
Watt -m2 is the unit of |
Energy
Intensity
Power
Work
|
11 |
The dimension of power is |
MLT-1
ML2T-2
ML2T2
ML2T-3
|
12 |
The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is |
2.45 watt
24.5 watt
245 watt
2.45 watt
|
13 |
Identity the non conservative force among the following. |
Frictional force
Electrical force
Gravitational force
Elastic restoring force
|
14 |
A body of mass 2 kg moving with velocity of 4 ms-1 has K.E. equal to. |
16 J
8 J
32 J
2 J
|
15 |
3 Joules of work id done is 3 seconds, then power |
6 Watt
1 Watt
3 Watt
2 Watt
|
16 |
The commercial unit of electric energy is |
Kilo watt hour
watt
Watt hour
Kilo Watt
|
17 |
Kilo watt hour is the unit of |
Power
Energy
Force
Torque
|