The potential difference between the terminals of electric heater is 60V, when it draws a current of 4A from the source. The resistance of electric heater coil is A. 15Ω B. 240Ω C. 24Ω D. 64Ω
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- V = 60V I = 4A R = VI = 604 = 15Ω When potential difference is increased to 120V I = VR = 12015 = 8A The current through the heater becomes 8A
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