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प्रश्न
An electric bulb is rated ‘100 W, 250 V’. What information does this convey?
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उत्तर
It means that if the bulb is lighted on a 250 V supply, it consumes 100 W electrical power, (which means 100 J of electrical energy is converted in the filament of the bulb into light and heat energy in 1 second).
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संबंधित प्रश्न
Name the quantity whose unit is (i) kilowatt, and (ii) kilowatt-hour.
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(b) watt-hour
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(a) 500°C
(b) 1500°C
(c) 2500°C
(d) 4500°C
What is the current I in the given circuit (Fig. )?
The diagram shows a coil connected to a center zero galvanometerG . The galvanometer shows a deflect ion to the right when the north pole N of a powerful magnet is moved to the right as shown .
(i) Explain, why the defelct ion occurs in the galvanometer.
(ii ) State whether th e current in the coil is cl ockwise or anticl ockwise
when viewed from the end P.
(iii ) State th e observation in G when the coil is moved away from north
pole N of the magnet keeping the magnet stationary.
(iv)State the observation in G when both the coil and the magnet are
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