Question

Two lamps of 100 W and 60 W are joined in parallel with 220 V line. How much current will flow through the circuit ?(Ans : 0.73 A),Solve the given example.

Answer 1

Power of first lamp (P₁) = 100 W

Power of second lamp(P₂) = 60 W

We know that in parallel, Potential remains the same.

∴ (V) Potential in both lamp will be 220 V.

Now, For first lamp,

∵ P₁ = V × I₁

∴ I = P₁/V

⇒ I₁ = 100/220

= 0.46

Now, For second lamp,

P₂ = I₂ × V

⇒ I₂ = 60/220

= 0.27

∴ Total current = I = I₁ + I₂ = 0.46 + 0.27 = 0.73 A

Hope it helps .