| 1 |
Influenza is caused by a -
|
virus <br>
Fungus <br>
Algae <br>
Bacterium <br>
|
| 2 |
One should not connect a number of electric appliances to the same power socket because,
|
This can damage the appliances <br>
This can damage the domestic waring<br>
the appliances will not a get proper current<br>
the appliances will not get full voltage<br>
|
| 3 |
The sun remains visible for some time after it actually sets below the horizon. This happens due to
|
atmosphere refraction <br>
Scattering of light <br>
dispersion <br>
Persistence of vision <br>
|
| 4 |
An artificial satellite stays in the orbit round Earth because
|
Earth gravity does not act on the satellite dew to the great distance between them<br>
Earth's attraction produces the necessary centripetal acceleration<br>
Earth's attraction is balanced by the attraction of other planets <br>
There is an engine in the satellite which constantly applies an upward force to balance its weigh<br>
|
| 5 |
If the radius of Earth were to shrink buy one per cent , its mass remaining the same, the acceleration due to gravity on Earth's surface would
|
Increase <br>
Decrease <br>
remain unchanged <br>
None of theses <br>
|
| 6 |
When a stone thrown into a deep lake sinks deeper and deeper into the water, the upthrust acting on it.
|
In creases <br>
Decreases <br>
First decreases then increases <br>
Remains constant <br>
|
| 7 |
A bucket containing water is rotated in vertical circle at a higher speed . what will happen to the water when the bucket is upside down at the higher point?
|
Al the water will spill out<br>
Amount water will spill out <br>
Water will be thrown out at a tangent<br>
No water will spill out<br>
|
| 8 |
A ball bounces higher at high altitudes than on plains,because:
|
The pressure at higher altitudes is higher than that on plains <br>
The downward pu8ll due to gravity is higher than that on plans <br>
The rarefied air offers less resistance to the ball <br>
The air is more pure at higher altitudes <br>
|
| 9 |
A ball bounce higher at high altitudes than on plains, because
|
The pressure at higher altitudes than on plains, because <br>
The downward pull due to gravity is higher altitudes is higher than that on plains<br>
The Rarefied air offers less resistance to the ball <br>
The air is more pure at higher altitudes<br>
|
| 10 |
Which law is involved in the act of cleaning a carpet by beating it with a stick?
|
First law of motion <br>
Second law of motion <br>
Law of conservation of energy <br>
Law of conservation of mass <br>
|
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