Question

10. Two appliances of rating 200
watt-250 volts and 100 watt-250
volts are joined in series to a 250
volts supply. Total power
consumed in the circuit is​

Answer 1

Answer:

Explanation:

We know that, R = V^2 /P

Hence resistance of 1st bulb = (250)^2 / 200 = 625/2

resistance of 2nd bulb = (250)^2 / 100 = 625

Total resistance of the circuit when the bulbs are connceted in series = 625/2 + 625 = 1875/2 ohm

Therefore, total power consumed in the circuit , P = (250)^2 / (1875/2) = 67 watt