## Clock rule (electromagnetism) | Physics class 10

Clock rule :        Looking at the face of the loop, if the current around that face is in the anticlockwise direction, the face has the north polarity,…

## How to store a permanent magnet?

Self-demagnetization is the phenomenon by which magnet tends to become weak after some time if their poles are left free. To retain the magnetic property, permanent bar magnets are stored…

## Factors affecting the resistance of a conductor | Class 9 physics

(i) The material of wire: The resistance of wires of the same length, same area of cross-section, but of different materials differ depending on their material. Metals have low resistance.…

## What is the minimum distance for echo?

Minimum distance for echo Class x > Physics > Sound If d is the distance between the observer and the obstacle and V is the speed of sound, then the…

## Block and tackle system of pulley | Physics class 10

Block and tackle Class X > Physics > Machines Block and tackle system is the arrangement of pulleys in which two blocks of pulleys are used. One block (upper) having…

## State the principle of conservation of energy | physics class 10

Principle of conservation of energy Principle of conservation of energy states that energy can neither be created nor can it be destroyed. It can only change from one form to…

## Equilibrium of bodies | physics class 10

Equilibrium of bodies Class x > Physics > Force Definition of equilibrium When a number of forces acting on a body do not change the state of rest or motion…

## All about electrical fuse | physics class 10

All about an electric fuse Definition of fuse An electric fuse is a safety device which allows only a limited amount of current to pass through it. An electric fuse…

## Colour coding of wires in a cable | Physics class 10

Each electric appliance is provided with a three flexible cable. The insulation on the three wires is of different colours. This colour coding of wires helps us to connect the…

## Centre of gravity | Physics class 10

Centre of gravity - The centre of gravity of a body is a point about which the algebraic sum of moments of all the particles constituting the body is zero.…

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