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प्रश्न
What material is used for making wire to prepare heating coils? Give a reason.
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उत्तर
Nichrome is used for making wire to prepare heating coils. The reason is that its melting point is high and its resistivity is also high.
संबंधित प्रश्न
Complete the following :-
(a)
If five resistances, each of value 0.2 ohm, are connected in series, what will be the resultant resistance?
State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances.
Name the following substances:
(i) Showing low resistivity,
(ii) Showing very high resistivity,
(iii) Showing moderate resistivity.
When do you say that the resistors are connected in this way? Draw a circuit diagram.
How does the resistivity of an alloy such as constantace depends on temperature.
Six equal resistors of 1 ohm each are connected to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves it at D.
Two electric bulbs have resistances in the ratio 1 : 2. If they are joined in series, the energy consumed in them is in the ratio:
