3. The energy used by the electric geyser for 30 minutes is 44 kJ, at a voltage of 250 V. How large is the current flow through the electric geyser?
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Power = 1500W , Voltage (V) = 250V
(i) Current drawn = P/V
=> 1500/250 = 6A
(ii) Energy consumed = power x time = 1500 x 50 = 75000Wh [1 kW = 1000W]
=> 75unit [ 1 unit = 1kWh]
(iii) cost of energy consumed = 75 x 6 = Rs 450
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