Q. 135.0( 1 Vote )

# A resistance is c

Power after addition of capacitor will decrease. Power after addition of inductor will increase.

The impedance of the circuit after introduction of capacitor is given by … (i), where R = resistance, XC = capacitive reactance.

Now, average power is given by … (ii), where irms = rms value of current, R = resistance

Since irms decreases with increase in impedance, hence on the introduction of a capacitor, the average power absorbed by the resistance will also decrease. (Ans)

Now, the impedance of an LCR circuit is given by … (iii), where R = resistance, XL = inductive reactance, XC = capacitive reactance.

Hence, compared to Z1, the value of Z2 is less and the rms value of current is greater in this case. Therefore, if a small inductance is also introduced in the circuit, the average power absorbed increases. (Ans)

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