Physics Questions

The ____ of a substance is defined as the mass per unit volume.

Calculate the work done by the force of gravity when a satellite moves in an orbit of radius 40,000 km around the earth.

What is the resistance (in Ω) of an electrical component if a current of 0.4 A passes through it on application of 12 V of potential difference across it?

A 5 kg object is raised through a height of 4 m. The work done by the force of gravity acting on the object is (take g = 10 m/s2)

Two identical resistors, each of 10 ohm, are connected in parallel. This combination, in turn, is connected to a third resistor of 10 ohm. The equivalent resistance of the combination is ___.

For what is Mohs scale used?

The pressure inside the cabin of the aircraft flying at an altitude is

Which among the following is not an environment friendly mode of producing electricity?