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संबंधित प्रश्न
Define watt-hour. How many joules are equal to 1 watt-hour?
1k Wh = ______J
A coil of copper wire is connected to a galvanometer. What would happen if a bar magnet is:
(i) Pushed into the coil with its north pole entering first?
(ii) Held at rest inside the coil?
(iii) Pulled out again?
An electric iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days?
An electric current is passed through a metallic wire. The wire gets heated up. Give the reason. Is it possible to melt the wire by passing a heavy current?
A device is used to transform 12 V a.c. to 200 V a.c. What is the name of this device? Name the principle on which it works.
How does the heat produced by die passage of current in a metallic wire depend on the time of passage of current in the wire?
What is the resistance of an appliance rated at V volt, P watt?
What is the meaning of electric power of an electrical device? Write its SI unit.
