What is sonar ( sound navigation and ranging )?

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Why ate the telegraph wires kept a little loose ?

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Why does a semicondctor act as an insulator at 0'k and why its conductivity increases with increasing temperature?

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How do you separate hydrogen and oxygen gases in industrial electrolysis of water process?

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Why dies a small quantity of air introduced into the top of the barometer tube depress the level of mercury ?

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Two bulbs, one of 600W and the other of 100W having same voltage rating are connected in series across the supply in a room.Which bulb will glow brighter? If one of the bulb is switched off, what will be effect on illumination?

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Why does railway carriage in motion not leave the rails ?

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if an ice cube place in a beaker contained water for some time,wether the quantity of water inside the beaker increases?

5 Answers   Kerala Public Service Commission,

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explain the proper definition of light?

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i measured a 3-ph capacitor with a multimeter which is not connected to supply... but i could get the phase to phase voltage... how tis is possible..????

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What is a Diamond ?

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Explain what is the heterogenous?

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