If a 75 W lightbulb operates at a voltage of 120 V, what is the current in the
bulb?*
A.1.6A
B.9000 A
C.
195 A
D.
0.63 A

Option D. 0.63 A

Explanation:

The following were obtained from the question:

P = 75W

V = 120 V

I =?

But,

P = IV

I = P / V

I = 75 / 120

I = 0.63A

The current in the bulb is 0.63A.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.