Test: Chemical Effects of Electric Current- 2

Combination of two or more cells is called battery. In a batter cells are connected in series with opposite poles close to each other.

When electric current passes through the filament of bulb get heated and start emitting light and heat energy. So, heating effect of electric current is applied in bulb.

Metals are generally good conductor of electricity as they have free electron. Non-metals except graphite are bad conductor of electricity.

Switch is a device which prevents or allows the current to flow through it. Switch is combined with positive terminal of circuit.

Battery is a combination of two or more cells connected in series.

When the liquid between two ends allow electric current to pass through them, the bulb of tester blows.

Tin is electroplated on iron for making cans for storing food and drinks as tin is less reactive than iron.

When two or more cells are joined together in series, it forms a battery. Battery provides more current than single cell.

The decomposition of liquid compound on passing an electric current through it is known as Electrolysis.

When current is passed through an ionic substance that is dissolved, the electrode goes under chemical reaction and separates the materials.

The process of electrolysis uses DC current in the separation of materials.

Electric current is said to be pass through a wire when only electron passes through it. Flow of electron causes flow of current.

Alkaline cell is commonly called as manganese dioxide alkaline zinc cell.

Electric current is measured by a device called ammeter. The S.I. unit of electric current is ampere.

Heating effect of electric current is used in electric bulb. When current passes through the filament of bulb, due to high resistance, heat is produced that cause glow to glow.

The obstruction in flow of electric current is called resistance. Conductor having very high resistance is called insulator.

In a circuit, potential difference is created in an electric circuit to due to cell or battery. Potential difference is measured in Volt.

In an electric circuit, current flows due to difference in potential difference. Potential difference is due to presence of battery or cell.

Bread toaster is an appliance that works on heating effect of electric current as the filament of bread toaster has high resistance to provide high heat.

The close and continuous path of electric current is called electric circuit. Electric circuit provides a complete path for current to flow.

Fuse wire is a safety device used in electric circuit to protect the circuit due to overflow of current.

Tap water, iron nail and steel spoon are good conductor of electricity but air is poor conductor of electricity.