Questions

The unit of power used in industry is

If a body is whirled in a circle, then the work done on it ___.

In a concave mirror when the object is placed at infinity which of the following applies to the image?

What does the symbol R in electricity stand for ?

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

When the kerosene burned, the fuel in the tank below would be __________ pressure, and __________a small circular flame would appear in the burner.The valve had to be opened to let more kerosene vapour to the burner and pumping resumed. With the increase in pressure, the burner flame would spread _________ a loud noise. To lower the flame,the valve had to be _________ opened to reduce the pressure and then tightened until the desired flame size was achieved. _________ you wanted the flame to be bigger, you had to hit the piston again. Pump stoves are still in vogue.

below would be __________ pressure

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Carry out a task clumsily or incompetently

Choose the odd word/letters/number/number pair from the given alternatives.

Who wrote the National song of India?