What is the resistance of a lamp operating at 115 volts and using 0.25 amp of current? what relationship did you use to find the answer?

Question

Maurice Frederick

Physics

30 August, 08:25

What is the resistance of a lamp operating at 115 volts and using 0.25 amp of current? what relationship did you use to find the answer?

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Answers (1)

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Chad · Answer 1

We are asked to solve for the resistance of a lamp that is operating at 115 volts and using a current with a magnitude of 0.25 amperes. To solve this problem, we can apply Ohm's law which is V = IR where "V" represents the voltage, the "I" represents the current and "R" represents the resistance. The solution is shown below:

I = 0.25 ampere

V = 115 volts

R = V/I

R = 115 volts / 0.25 ampere

R = 460 ohms

The answer for the resistance is 460 ohms.

The resistance directly proportional to the voltage such that when voltage increase, resistance also increases. On the other hand, resistance is inversely proportional to the current.