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At resonance in an a.c. circuit, what is...

At resonance in an a.c. circuit, what is the value of power factor ?

Text Solution

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At resonance. `Z = R`,
`:.` Power factor, `cos phi = (R )/(Z) = (R )/(R ) = 1 =` maximum.
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  • An electric bulb consumes only 25% of the peak power in an a.c. circuit. What is the phase difference between the circuit and the applied a.c. voltage ?

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    D
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    A
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    B
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