In the circuit shown there is a box cont...

In the circuit shown there is a box containing a resistor and an inductor and the box in series with the capacitance C connected to alternating power source of frequency to 2 rad/s. Box has power factor `1/sqrt2` and circuit has overall power factor 1. The impedance of the box is

`1/(sqrt2C)`

`1/(2sqrt2C`

`1/(2C)`

`1/C`

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