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संबंधित प्रश्न
What is the SI unit of (i) electric energy, and (ii) electric power?
Name two gases which are filled in filament type electric light bulbs.
Which of the following is the most likely temperature of the filament of an electric light bulb when it is working on the normal 220 V supply line?
(a) 500°C
(b) 1500°C
(c) 2500°C
(d) 4500°C
List the names of three electrical gadgets used in your house. Write their power, voltage ratingand approximate time for which each one is used in a day. Hence find the electrical energyconsumed by each in a day.
Fig . shows the essent ial features of a battery operated bell. The hammer strikes the gong when the swi tch is closed . State and explain the effect of using the following material successively to form the core.
(a) Plastic
(b) Steel
(c) Copper
What are the two main systems of wiring commonly used in houses? Which of these systems mentioned by you is better and why?
The electric bulbs used these days have a coil-coiled filament. State its reason.
Why is the electric power from the generating station transmitted at high voltage?
An electric kettle is rated 3kW, 250V. What should be the current capacity of the fuse with it?
1 kWh is equal to:
