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प्रश्न
Explain the heating effect of electric current.
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उत्तर
- When an electric current passes through a wire, the electrical energy is converted to heat.
- In heating appliances, the heating element is made up of materials with high melting point. An example of such a material is nichrome (an alloy of nickel, iron and chromium).
- The heating effect of electric current has many practical applications.
- The electric bulb, geyser, iron box, immersible water heater are based on this effect.
- These appliances have heating coils of high resistance.
- Generation of heat due to electric current is known as the heating effect of electricity.
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संबंधित प्रश्न
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Your teacher has shown you the following activity.
Activity: Teacher has wound a long insulated piece of wire around an iron nail in the form of a coil. Free ends of the wire are connected to a cell through a switch as shown in the following figure. The current is switched on and some pins are placed near the ends of the nail.
Write down any three questions that come to your mind about this activity.
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