In the given circuit voltmeter shows a reading of 4V, then the power developed across R resistance will be
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To calculate power on a given resistor, first you need to have the values of voltage(V), resistance (R) or current(I)
The basic formula of power i.e in Watts that can be used are as follows;
W= V x I or W= I^2 x R or W= V^2/R
These basic formulas can help you calculate the power given any quantity based on the information I have given above.
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