Physics
Which one among the following components is used as an amplifying device?

Transistor
Transformer
Capacitor
Diode

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Physics
Absolute Zero is defined as

The temperature at which all molecular motion ceases
At which the volume becomes zero
At which water boils at 298K
At which liquid Helium boils

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Physics
When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is

Above a certain minimum value irrespective of amount of water in the pail
Below a certain minimum value irrespective of amount of water in the pail
Above a certain minimum value depending on amount of water in the pail
Below a certain minimum value depending on amount of water in the pail

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