Electricity and Magnetism — PHYSICS STD 7 — Question

According to law of conservation of energy, energy changes from one form to another form, but the total energy of that system

Light of a bulb is an example of conversion of :

Select the correct alternative
A piece of paper of dimensions 1.5 m x 20 cm has area :

When is the work done in the following situation :
1.A girl pushing a wall
2. A boy carrying a suitcase ibn h is hand.
3. A stone falling freely
4. A boy climbing up the stairs

SI scale of temperature is :

The work done by a body is the product of displacement and :

A plot measuring 2 km in length and 1/2 km in breadth has area of :

The purpose of armature in an electric bell is

The ability to do work is called :

Which of the following physical quantity is used to describe the motion of a body?