an electric heater of 2kW is used for 10h.how much energy is consume in kWh
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Answer:
7.2×10⁶
Explanation:
energy = 2kW
1 kW per hour = 3.6 × 10⁶J
energy used for 1 hour = 2 × 3.6 × 10⁶
= 7.2 × 10⁶
energy used for 10 hours = 7.2 × 10⁶ × 10
= 7.2 × 10⁷
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