Question

If three tube lights with power 10 W, 25 W and 50 W are connected in parallel to a source voltage V, then the effective power of the combination is

• A. 8 W
• B. 85 W
• C. 28.3 W
• D. 50 W
• E. 6.25 W

Hint:

In series, the effective power is calculated like parallel resistors: \( \frac{1}{P_{\text{eff}}} = \frac{1}{P_1} + \frac{1}{P_2} + \frac{1}{P_3} \).
In parallel, it is simple addition.

Answer 1

The Correct Option is B