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[" 12.A sinusoidal ac current flows thro...

[" 12.A sinusoidal ac current flows through a resistor of resistance "R." If the peak "],[" current is "_(p)," then the power dissipated is "],[[" (a) "l_(p)^(2)R cos6," (b) "(1)/(2)l_(p)^(2)R," (c) "(4)/(pi)l_(rho)^(2)R," (d) "(1)/(pi)I_(p)^(2)R]]

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