Question

Plz answer Q 61 asap​

Answer 1

If 5 bulbs each 100 W burn 4 hours per day

We know that for an electric appliance   p=(v^2)/R

Resistance will be given as   R=(v^2)/p

Now, here  

P = 100 W

V = 200 volts

Thus, resistance of the bulb is R = 400 Ω  

then,

the total power consumption per day is 100 X 5 X 4 = 2000 W.

The unit is 2000/1000 = 2

The rate per day is 2 x 4 = 8 .

So energy consumption per day is Rs. 8