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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
State the S.I. unit of electrical power.
State and define the household unit of electricity.
Name the physical quality which is measured in
(i) Kw (ii) kWh
Calculate the current through a 60 W lamp rated for 250 V. If the line voltage falls to 200 V, how is the power consumed by the bulb affected?
An electric bulb marked 220 V, 100 W will get fused if it is made to consume 150 W or more. What voltage fluctuation will the bulb withstand?
What is electric power? State and define its S.I. unit.
Point out two main disadvantages of ‘Tree System’.
State relative advantages and disadvantages of ring system of wiring over the tree system.
A battery of e.m.f. 12V and internal resistance 1.6 Ω is connected to two resistors of 4Ω and 6Ω connected in parallel. Calculate:
(i) the current drawn from the battery,
(ii) the power dissipated in each resistor,
(ii)the total power supplied by the battery.
A family uses 8 kW of power. Direct solar energy is incident on the horizontal surface at an average rate of 200 W per square meter. If 20% of this energy can be converted to useful electrical energy, how large an area is needed to supply 8 kW?
