When connected to a 120-volt power supply, ?

Question

how much current exists in a light bulb that has a resistance of 240 ohms?

A) 28 800 A

B) 240 A

C) 120 A

D) 2 A

E) 0.5 A

Can you explain your answer please?

Answer 1

E = IR

volts = amps * ohms

try to grasp Ohm's law.

it comes up a lot.

Answer 2

Explain what, it's ohm's law?

I = E/R = 120/240 = 0.5 amps.

.

Answer 3

current i in amperes is voltage v in volts divided by resistance r in ohms

so current is 120/240  =0.5 amperes

Answer 4

0.5 amperes using ohms law, here is website that does the math for you!

http://ourworld.compuserve.com/homepages...

Answer 5

0.5 A according to ohm's law

I = V/R