RBSE Class 7 Science Notes Chapter 14 Electric Current and its Effects

These comprehensive RBSE Class 7 Science Notes Chapter 14 Electric Current and its Effects will give a brief overview of all the concepts.

RBSE Class 7 Science Chapter 14 Notes Electric Current and its Effects

→ It is convenient to represent electric components by symbols. Using these, an electric circuit can be represented by a circuit diagram.

→ In the symbol of the electric cell, the longer lines represent the positive terminal and the thicker, shorter line represents the negative terminal.

→ The positive terminal of one cell is connected to the negative terminal of the next cell. Such a combination of two or more cells is called a battery.

→ The wire gets hot when an electric current passes through it. This is the heating effect of the electric current.

→ The amount of heat produced in wire depends on its material, length and thickness.

→ Wires made from some special materials melt quickly and break when large electric currents are passed through them. These wires are used for making electric fuses.

→ When electric current passes through a wire, it behaves like a magnet. This is the magnetic effect of the electric current.

→ A current carrying coil of an insulated wire wrapped around a piece of iron is called an electromagnet.