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संबंधित प्रश्न
An electric bulb is rated at 220 V, 100 W. What is its resistance?
A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.
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.
An electric bulb is rated ‘100 W, 250 V’. How much current will the bulb draw if connected to a 250 V supply?
How is the amount of heat produced calculated due to the passage of current in a metallic conductor? Derive an expression for it.
What is the commercial unit of electrical energy?
A student wants to use an electric heater, an electric bulb and an electric fan simultaneously.
How should these gadgets be connected with the mains? Justify your answer giving three reasons.
A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V Write Yes or No. Give supporting calculations to justify your answer.
Two heaters A and B have power rating of 1 kW and 2 kW, respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is ______
