Question

Which of the following bulbs will have the least resistance?
60
The potential difference
The power of the bulb
across the bulb
(A)
220V
40W
(B)
220V
100W
(C)
120V
40W
(D)
120V
100W
А СО
В СО
C

Answer 1

Explanation:

The correct answer is D. 120V 100W

R = V²/P

= 120²/100

= 14400/100

= 144 ohm

(this is the least resistance)