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प्रश्न
‘The current rating of a fuse is 5A’. Comment on this statement.
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उत्तर
This statement means that the current in the circuit should not Exceed 5A. As the current in circuit will Exceed 5A, the fuse will melt and the circuit will break.
संबंधित प्रश्न
A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.
How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?
(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s
Write an expression for the electrical power spent in flow of current through a conductor in terms of
(a) Resistance and potential difference, (b) current and resistance.
What is the current in the circuit shown (Fig. )

An electric bulb of resistance 500 Ω draws current 0.4 A from the source. Calculate:
- the power of bulb and
- the potential difference at its end.
Which cable, one rated 15A and the other rated 5A will be thicker? Give a reason.
Name three main characteristics of an heating element.
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A. bulb is rated at 100W, 250V and another one at 60W, 250V. What is the current flowing in the circuit if the two bulbs are put in series across a 220 V mains supply?
A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V Write Yes or No. Give supporting calculations to justify your answer.
