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प्रश्न
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उत्तर
P = VI = I2 R = `"V"^2/"R"`
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संबंधित प्रश्न
If a bulb of 60W is connected across a source of 220V, find the current drawn by it.
What is the SI unit of electric energy?
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
1k Wh = ______J
An electric bulb of resistance 500 Ω draws current 0.4 A from the source. Calculate:
- the power of bulb and
- the potential difference at its end.
In an electric radiator or room heater, state with reason, why the porcelain tube wound with a nichrome wire is placed between the pole and principal focus of the parabolic concave reflector.
An electric bulb is marked 100 W, 230 V. What does this mean?
Find the heat produced in joules when a current of 10 amperes flows through a connecting wire of resistance 2 × 10-2 ohms and heating element of resistance 250 ohms for 2 seconds.
An Electric bulb is marked 100 W, 230 V. What find the energy consumed by the bulb in one hour.
What is the commercial unit of electrical energy? Represent it in terms of joules.
