Physics Electricity CBSE Board 2026 Medium
(i) How much electric current will an electric iron draw from 220 V source if the resistance of its heating e…
- (i)How much electric current will an electric iron draw from 220 V source if the resistance of its heating element when hot, is 55 ? Calculate the power consumed by the electric iron when it is operated at 220 V.
- (ii)In a house, 3 bulbs of 100 watt each, are lit for 5 hours daily and an electric heater of 1.0 kW is used for half an hour daily. Calculate the total energy consumed in a month of 30 days and its cost at the rate of ₹ 3.60 per kWh.
- (iii)With reason explain, why are alloys commonly used to make elements of electrical heating devices.
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