For a heater rated at 4kW and 220V, calculate: a) the current b) the resistance of the heater c) the energy consumed in 2 hours the cost if 1 kWh is priced at Rupees 60
ScienceClass 10ICSEAnswered 27 Mar 2026
Answer
Given,
P = 4kW V = 220V
a) I = ? P = VI
I = 16amp
b) R = ? P = I2R
R = 15.25 ohm
- Energy consumed in two hours = PT E = 8kWh
- If 1kWh = Rupees 6 Total cost = Rupees 36.8