A light bulb has resistance of 210 Ω when operating at 105 V.Find the current in the light bulb.
A) 2 A
B) 0.25 A
C) 0.5 A
D) 0.7 A
E) 1.4 A

Question

A light bulb has resistance of 210 Ω when operating at 105 V.Find the current in the light bulb.
A) 2 A
B) 0.25 A
C) 0.5 A
D) 0.7 A
E) ​1.4 A

Quizplus · Accepted Answer

We can use Ohm's law, which states that the current (I) through a device is equal to the voltage (V) across the device divided by its resistance (R):

I = V/R

Substituting the given values, we get:

I = 105 V / 210 Ω = 0.5 A

Therefore, the answer is choice C) 0.5 A.

A Light Bulb Has Resistance of 210 Ω When Operating