Question

Two bulbs of 60 W ,and 20 w are connected in parallel to a 220V supply.calculate the circuit current​

Answer 1

As we know, P = VI
where P → Power in Whatt
V → Potential difference or Voltage drop in Volt
I → Current in Ampere

Now, Two bulbs of power 60W, and 20W
P1 = 60W
P2= 20W
connected in parallel

Now, as we know in parallel Voltage is same, but the current need not to be same, (until same resistance).
So, applying P = VI
I = P/V
I1 = P1/V = 60/220 = 3/11 Amp
I2 = P2/V = 20/220 = 1/11 Amp
Now, total current, I = I1 + I2
So, total current, I = 3/11 + 1/11 = 4/11 Amp
I = 4/11 ampere = 0.3636 ampere

Thankyou!!!