Physics Questions

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

Find the resistance (in mega ohm) of a wire of length 8 m, cross sectional area 2 sq.cm and made of a material of resistivity 120 ohm m.

If the resistance of a conductor is reduced to half its initial value, then the heating effect in the conductor will become ___.

Instrument used for measuring specific gravity is called _____.

Optical fibre works on which of the following principle of light?

The SI unit of acceleration is __________.

The area under a Velocity-Time graph represents ______________.

1 m/s equals ____________ km/hr