| 1 |
A boat full of scrap of iron is floating on water in large tank. If all the iron is dropped into water the level of water will
|
Go up<br>
Go down<br>
Remain the same <br>
None of them<br>
|
| 2 |
When oil is spread on water surface, the surface tension
|
Increases <br>
Decreases <br>
Remains the same <br>
Depends on the nature of oil<br>
|
| 3 |
A liquid boils art a temperature at which its saturated vapour pressure becomes
|
Twice the atomic pressure <br>
Half the atomic pressure <br>
Equal to the atomic pressure <br>
None of the above<br>
|
| 4 |
Metals are good conductors of heat because
|
They have free electrons <br>
Their atoms are far apart <br>
Their toms collide frequently <br>
They have reflecting surfaces <br>
|
| 5 |
A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen
|
Half of the image disappears <br>
Complete image disappears <br>
Complete image is formed <br>
None of above <br>
|
| 6 |
If the cover of a book looks red when seen through a piece of red glass then the cover mist be
|
Red <br>
Fluorine <br>
Green <br>
Red and white <br>
|
| 7 |
Zener diode is used for
|
Rectification<br>
Amplification <br>
Voltages stabilization <br>
Modulation <br>
|
| 8 |
During an isothermal expansion of an ideal gas:
|
Its internal energy increases<br>
Its internal energy decreases <br>
Its internal energy does not change<br>
The work done by the gas in not equal to the quantity of heat absorbed by it<br>
|
| 9 |
Which of the following parameters is the same for molecules of all gases at given temperature?
|
Mass <br>
Momentum <br>
Speed<br>
Kinetic energy <br>
|
| 10 |
Who is considers the father of chemical batteries
|
Martin P . Jones <br>
Niels Bohr <br>
Alessandro volta <br>
Albert Einstein<br>
|
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