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प्रश्न
What is the order of current drawn by appliances connected to the ‘light circuit’ of a household?
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उत्तर
The appliances, connected to the light circuit, are supposed to draw currents of the order of 10A to 5A.
संबंधित प्रश्न
Which of the following terms does not represent electrical power in a circuit?
When an electric lamp is connected to 12 V battery, it draws a current of 0.5 A. The power of the lamp is:
(a) 0.5 W
(b) 6 W
(c) 12 W
(d) 24 W
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
Water in an electric kettle connected to a 220 V supply took 5 minutes to reach its boiling point. How long would it have taken if the supply voltage had fallen to 200 V?
Define 1 kilowatt hour.
Point out two main disadvantages of ‘Tree System’.
What changes in energy occur in an electric bulb?
An electric iron is rated at 230 V, 750 W. What is its resistance? What maximum current can be passed through it?
A bulb is marked 100W, 220V and an electric heater is marked 2000 W, 220 V.
(i) What is the ratio between the resistances of these two devices?
(ii) How does the power-voltage rating of a device help us to decide about the type of leads (connecting wires) to be used for it?
(iii) In which of the above two devices, a thicker connecting wire of lead is required?
An immersion rod having resistance of 50 Ω is connected to 220V main supply. Assuming that all the energy generated goes to heat the water, calculate the time taken to heat 5 kg water from 30°C to 100°C.
