Question

An electric enser needs a power of 50 W for its operation. When plugged into a 120 V outlet, determine how much current passes through the electric enser, and what is its resistance. 

          An electric enser needs a power of 50 W for its operation. When plugged into a 120 V outlet, determine how much current passes through the electric enser, and what is its resistance.

Added by Jill G.

University Physics with Modern Physics
University Physics with Modern Physics
Hugh D. Young 14th Edition
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An electric enser needs a power of 50 W for its operation. When plugged into a 120 V outlet, determine how much current passes through the electric enser, and what is its resistance.
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Transcript

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00:01 In this problem, we are given that there is an electrical component and this needs a power of 50 watts for it to be operated when this is plugged into a source that supplies a voltage of 120 volts.
00:16 And we are required to determine the current which passes through this component as well as its resistance.
00:24 So let's represent current and resistance with i and r respectively.
00:27 And let's use this formula to compute current, so when we rearrange, i would be p over v.
00:34 So that's equal to 50 divided by 120...
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