Which is taken as the base year for the National Family

In which type of wave do the particles of the medium vibrate perpendicular to the direction of wave propagation?  

If a force is applied to two stationary objects with different masses for the same duration, what will be the same for both objects?

Let the electric field part of an electromagnetic wave is E = {(2.3 N/C) cos [(1.2 rad/m) y + (2.4 × 10⁸ rad/s)t]} î.

What does Ohm's Law state?  

An object is projected vertically upward from Earth's surface with speed 

If resistances R,2R,4R,8R… are connected in parallel, the equivalent resistance is:

Two sound waves have frequencies 256 Hz and 260 Hz. The beat frequency is:

Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by –

Which physical quantity has unit “Joule/second”?