What is the principle of electric torch?

The bulb of a torch is more or less similar to an electric bulb. The only difference is that it light up with a low current of a few volts. The batteries supply this current. As soon as the torch is switched on, the chemical present inside the batteries produces an electric current.

On what principle does an electric torch work?

A torch consists of a simple electric circuit in which two or more cells are connected to a torch bulb through a sliding switch. When the torch is needed to provide light, the sliding switch is closed by pushing it forward so that the circuit is completed and the bulb of the torch lights up.

What is a torch Class 6?

A torch is a portable electric lamp which uses two (or more) cells to light a small bulb. A torch is used to provide light when going out during a dark night or when electricity supply fails at home. The torch has a bulb that lights up when it is switched on. A torch contains a simple electric circuit.

How does an electric torch work short answer?

Bulb: The bulb emits light when electric current flows through its filament. … The required current for the filament of the bulb is supplied by it. Switch: The switch is used to complete and break the circuit inside the torch. In simple words, it is used to turn the torch on and off.

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What is electric torch?

1. A small portable lamp usually powered by batteries. 2. A brief brilliant flood of light from a photographic lamp.

What is the purpose of using an electric switch?

Electricity and Circuits | Exercise



A switch is used to complete or break an electric circuit to use an electric appliance according our convenience. Some electrical gadgets that have switches built into them are electric lamps, cooler, washing machines, table fan, TV, radio, etc.

What are conductors for Class 6?

CBSE NCERT Notes Class 6 Physics Electricity and Circuits. Materials which allow electric current to pass through them are called conductors of electricity. Examples are iron nail, key, safety pin, water, human bodyetc.

What is a switch Class 6?

Electric Switch is an electrical device which can make or break an electric circuit. A switch is said to be in ‘ON’ position when it makes or completes the circuit and allows the current to pass through. Similarly, a switch is in ‘OFF’ position when it breaks the circuit and does not allow the current to pass through.

What is inside a torch?

In most flashlights, the lamp is either a tungsten filament (incandescent bulb) or a light emitting diode (solid state bulb), also known as an LED. The tungsten filament or LED glows when electricity flows through it, thus producing visible light.

What are the main parts of an electric torch?

An electric torch is a device used to light up an area when it is dark and can be used as a lamp. It has two or more than two cells, plastic casing, slide switch and a reflector.

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What is the function of a torch *?

A torch is a stick with combustible material at one end, which is ignited and used as a light source. Torches have been used throughout history, and are still used in processions, symbolic and religious events, and in juggling entertainment.

Why is it called a flashlight?

Etymology. Early flashlights ran on zinc–carbon batteries, which could not provide a steady electric current and required periodic “rest” to continue functioning. … Consequently, they could be used only in brief flashes, hence the common North American name “flashlight”.

Why are flashlights called torches?

The name comes from the old word for a flaming, hand-held light which were called torches. When battery powered versions appeared, they were called electric torches. Now that nobody carries around the old flaming sort, the electric bit was dropped, hence torch.

What is the full form of torch?

The full form of TORCH is toxoplasmosis, rubella cytomegalovirus, herpes simplex, and HIV. However, it can also contain other newborn infections. Sometimes the test is spelled TORCHS, where the extra “S” stands for syphilis.

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