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प्रश्न
Can we use the same fuse in a geyser and a television set? Explain.
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उत्तर
No, a geyser and a television set require different amounts of current to operate
Name two electric devices for each where
- the heating effect of current is used
- the magnetic effect of current is used
Maim Heating effect – Geyser, room heater.
Magnetic effect – Electric bell, Cranes to lift magnetic material.
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संबंधित प्रश्न
An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.
Name any two effects of electric current.
An electric heater is connected to the 230 V mains supply. A current of 8 A flows through the heater.
(a) How much charge flows around the circuit each second?
How does the resistance of a wire vary with its:
diameter?
The current passing through a room heater has been halved. What will happen to the heat produced by it?
What are the uses of electromagnets?
______ wire is used in the filament of the bulbs.
Assertion: A current-carrying wire should be charged.
Reason: The current in a wire is due to the flow of free electrons in a definite direction.
A student boils water in an electric kettle for 20 minutes. Using the same mains supply he wants to reduce the boiling time of water. To do so should he increase or decrease the length of the heating element? Justify your answer.
What is the heating effect of electric current?
