When the power delivered by a 100 volt battery is 40 watts the equivalent resistance of the circuit is
When the power delivered by a 100 volt battery is 40 watts the equivalent resistance of the circuit is
A. 100ohms
B. 25ohms
C. 300ohms
D. 250ohms
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Correct Answer - 4
Power `=(V^(2))/(R)`
`4 0=((100)^(2))/(R)`
or `R=(100xx100)/(40)Omega`
or `R= 250Omega`
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