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संबंधित प्रश्न
An electric kettle connected to the 230 V mains supply draws a current of 10 A. Calculate:
(a) the power of the kettle.
(b) the energy transferred in 1 minute.
State the S.I. unit of electrical power.
Two resistors A and B of resistance 4 Ω and 6 Ω respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate: (i) the power supplied by the battery, (ii) the power dissipated in each resistor.
State the S.I. units of electrical power and electrical energy.
(i) Define the household unit of electricity.
(ii) What is the voltage of the electricity that is generally supplied to a house?
Name the physical quantity which is measured in kW.
Name two common material used for heating elements.
Why is the heating element of an electric oven wound on a helix? State the reason.
An electric kettle is rated 3kW, 250V. What should be the current capacity of the fuse with it?
Two bulbs are rated: bulb A 100W, 120 V bulb B 10W, 120 V. If both are connected across a 120V supply, which bulb will consume more energy, When in series? Also calculate the current through each bulb in above cases.
What is the meaning of electric power of an electrical device? Write its SI unit.
