the resistance of. an electric heater is 40 ohm calculate the electric current flowing in it when is connected to main wire having potential difference 220 volt.
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720 J/H
Explanation:
An electric immersion heater with a resistance of 40 ohms is connected to a 240 V power supply Heat=
V^2×t= 240^2×30min=720 J/H
R 40×60
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