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प्रश्न
Name two electric devices for each where
(i) the heating effect of current is used and
(ii) the magnetic effect of current is used.
उत्तर
(i) Current-heating devices are used: room heaters and geysers.
(ii) Cranes and electric bells employ the magnetic influence of current.
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संबंधित प्रश्न
When current is switched ‘on’ in a room heater, it ______.
How much heat will an instrument of 12 W produce in one minute if it is connected to the heat produced by it?
Which electric heating device in your home do you think have resistors which control the flow of electricity?
Give scientific reason :
In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster, etc., an alloy such as Nichrome is used, not pure metals.
Find the odd one out and give its explanation.
Which of the following is correct?
The heating element of an electric iron is made up of:
What are the factors affecting heating effect of electric current?
When a current I flows through a wire of resistance R for time t then the electrical energy produced is given by ______.
An electric iron of resistance 20 Ω draws a current of 5 A. The heat developed in the iron in 30 seconds is ______.
