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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
In series combination which remains constant?
(a) Voltage
(b) Current
(c) Both current and voltage
(d) Both are variables
Complete the following :-
(a)
Why is the series arrangement not used for domestic circuits?
How does the resistance of a wire change when:
its length is tripled?
How does the resistance of a wire change when:
its diameter is tripled?
If five resistances, each of value 0.2 ohm, are connected in series, what will be the resultant resistance?
What is the equivalent resistance between A and B in the given circuit (Fig?)
What do you mean by power rating of an electrical appliance? How do you use it to calculate
(a) the resistance of the appliance and
(b) the safe limit of the current in it, while in use?
Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.
In an electrical circuit, two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be ______.
