(a) State expression for electric work in terms of potential diff… - Vidyadip

Question

(a) State expression for electric work in terms of potential difference, current and time.
(b) An electrical heater is rated $4 kW, 220 V$. Find the cost of using this heater for 12 hours if one kWh of electrical energy costs ₹ 3.25 .

✓

Answer

(a) $W = VIt$.
(b) Energy consumed in 12 hours $=4 kW \times 12 h=48 kWh$.

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