| 1 |
The blue colour of the clear sky is due to:
|
Diffraction of light <br>
Dispersion of light <br>
Reflection of light <br>
Refraction of light <br>
|
| 2 |
After long periods of use , a gray spot develops on the inside of a bulb, this is because
|
The tungsten filament evaporates and collects there <br>
The heat of the bulb scorches the glass at the top <br>
Dust inside he bub condenses on the top <br>
Glass undergoes a change dew to the heat <br>
|
| 3 |
Food is readily cooked in a pressure cooker because:
|
Boiling occurs at high temperature <br>
Boiling occurs at low temperature <br>
pressure remains constant <br>
The cooking material cannot come out<br>
|
| 4 |
Ice Floats on water Because:
|
Ice is Filled With Air <br>
Ice is Dense than water <br>
Waters depth more than ice <br>
Ice more than water <br>
|
| 5 |
Pure gold is:
|
17 carat <br>
20 carat <br>
24 carat <br>
36 carat <br>
|
| 6 |
One horse power is equal to:
|
736 watts <br>
746 watts <br>
748 watts <br>
756 watts <br>
|
| 7 |
Dynamo is a device that coverts:
|
mechanical energy into electrical energy <br>
Electrical energy into mechanical energy <br>
Alternating current into direct energy <br>
Heat energy into electrical energy <br>
|
| 8 |
Heat form the sun is received by the earth through:
|
Conduction<br>
Convection <br>
Radiation <br>
None of these <br>
|
| 9 |
Which one of the following elements extensively used in electronics?
|
Zironium <br>
Silicon <br>
Selenium <br>
Sodium <br>
|
| 10 |
The largest cell in the human body is:
|
Nerve cell <br>
Muscle cell <br>
Liver cell <br>
Kidney cell <br>
|
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