How much current will an electric bulb of resistance 1100 2 draw from a 220 V source? If a heater of resistance 100 is connected to the same source instead of the bulb, calculate the current drawn by the heater.
(a) What are the values of mA and A?
(b) Draw the symbols of battery and rheostat.
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Answer:
current=volt/resistance
220/1100=0.2
220/100=2.2
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