Question

A 30v, 90w lamp is to be operated on a 120v dc lines. For proper glow, how much resistance

Answer 1

A 30v, 90w lamp is to be operated on a 120v dc lines. For proper glow, how much resistance

Answer 2

Answer:

10 ohm

Explanation:

Formula Use: Power (P) = (V²)/R

P = 90 W

Volt (V) = 30 V

Resistance (R)

90 = (30×30)/R

R = (30×30)/90

R = 10 ohm