Light — Physics STD 10 — Question

Name the unit in which loudness of sound is measured.

State how are the two resistors joined with a battery in each of the following cases when:

equivalent resistance is more than either of the two resistances.

Write down the approximate temperature at which the water boils in a pressure cooker.

Name the rays or waves produced by the changes in the nucleus of an atom .

Two forces each of magnitude 2 N act vertically upward and downward respectively on two ends of a uniform rod of length 1 m, freely pivoted at its centre. Determine the resultant moment of forces about the mid-point of the rod.

What is a lever?

A lens forms an upright and magnified image of an object name the lens

Define angle of deviation.

Give one consequence of the high specific latent heat of fusion of ice.

What is wind energy?