Energy Test - 9...

A fast moving motorbike mainly converts chemical energy to …………….

The devices convert light energy into electrical energy is known as-

In the moving parts of a machine which process takes place?

A body of 8.4 kg is moving on a rough plane, which exerts a friction equal to 42N on the block. If the block moves 10m on the plane, then amount of heat produced will be:

A body is projected vertically up from a point on the ground. When it is at a height h above the ground, it’s kinetic and potential energies are found to be in the ratio of 3:2. If the body rises to a maximum height of HH above the ground, then the ratio of H:h will be

The glow worm produces light energy from which energy-

Which of the following energy conversions take place in a torch?

By charging a battery, it convert electrical energy into which energy-

A tube light converts electrical energy into which energy-

When fuels are burnt, which energy changes into Heat and light energy-

Which of the following device or machine converts chemical energy into electrical energy is

As the water stored in the reservoir of a dam flows out, its potential energy changes to which energy-

The plants trap solar energy in the form of:

Bumming of a meteorite in the Earth's atmosphere is an example of-

The temperature of water at the bottom of a waterfall is higher than that of the water at the top, the reason is-