If a lamp has a resistance of 105 Ω when it operates at 100 W,what current does it carry?
A) 1.02 A
B) 0.95 A
C) 0.98 A
D) 1.05 A
E) 1.95 A

Question

If a lamp has a resistance of 105 Ω when it operates at 100 W,what current does it carry?
A) 1.02 A
B) 0.95 A
C) 0.98 A
D) 1.05 A
E) ​1.95 A

Quizplus · Accepted Answer

The lamp operates at a power of P = 100 W and has a resistance of R = 105 Ω. 
Using the formula P = I^2 * R, we can solve for the current I:

I = sqrt(P/R) = sqrt(100/105) = 0.98 A

Therefore, the correct answer is choice C.

If a Lamp Has a Resistance of 105 Ω When