2013SPp1q17 What is the new P when V across resistor is doubled? Similar 2018PPp1q31

Answer: Option C

View the videos below to learn how to solve it. There are more than one method.

Alternatively, you may put values to work out using the 2 basic formulae of P = IV and V = IR. Refer the video below.

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2018PPp1q35

Answer: Option D