Question

An incandescent lamp is operated at 120 V, and the current is 0.5 A. So, the resistance of the lamp is:

Answer 1

Do you know the formula (OHM'S LAW) that relates Voltage, Resistance and Current?

Answer 2

No

Answer 3

Well the question is very evidently on the subject of Ohm's Law

V, I & R are the variables - you must find an equation which relates those 3

It will be the FIRST thing in your test or school notes on this subject.

Find the equation and write it here - I will help you apply it...

Answer 4

keep going... write the equation in any form - we can re-arrange it as required

Answer 5

U = I*R

U voltage
I current
R resistance

hope this will help you

Answer 6

It is much more usual to use V for Voltage.

I had hoped the OP might have taken the time to resuearch the formula for herself.

You have now been given the formula
V=I x R (Voltage = Current times Resistance)

In your question you have been given

V=120V
I = 0.5 A

So - put those values into the equation - and see if you can then solve the value of R