An ac source is initially connected to a resistor ‘R’ 
Situation (1) : If an inductor is connected in series with the resistor, the impedance in the circuit is $\sqrt{3}R$
Situation(2): If a capacitor is connected in series with resistor, the impedance in the circuit is 2R
Situation(3): Both the inductor and the capacitor are connected in series to the resistor.
In situation 3, if the phase of current and potential difference across the source is $\varphi$ then $\left|\cot \varphi \right|=p\pi$ where p is nearly ________