Physics Questions

The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 127.5 V ?

Instrument used for measuring specific gravity is called _____.

Ozone protects biosphere from ___________

The SI unit of acceleration is __________.

The rate of change of linear momentum of a body is proportional to the ___________ acting on it.

A wooden block of mass m1 kg accelerates at m/s when a force of 5 N acts on it. Another block of mass m2 kg accelerates at 20 m/s when the same force acts on it. If both the blocks are tied together and the same force acts on their combination, the acceleration will be about

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

Which among the following determines the pitch of a sound?