Physics Questions

Instrument for measuring blueness of the sky or ocean is called ___________.

A Sonar of a ship sends sounds waves of speed 1000 m/s. These waves are reflected back by the ocean floor in 2 seconds. Find the depth (in m) of theocean floor. 

The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

Kinetic energy depends on

The apparent weight of a person in a lift which is moving down with uniform acceleration is _______.

___________________ is defined as the force acting per unit current per unit length on a wire placed at right angles to the magnetic field.

Unit of impedance is ___________.

___________________states that the induced e.m.f. is directly proportional to the rate of change of magnetic flux linkage or rate of cutting of magnetic flux
linkage.