The equivalent inductance of the circuit between terminals P and Q is equal to
1
\(\frac{{\left( {{L_1} + {L_2} + 2M} \right)}}{{\left( {{L_1}{L_2} - {M^2}} \right)}}\)
2
\(\frac{{\left( {{L_1} + {L_2} - 2M} \right)}}{{\left( {{L_1}{L_2} - {M^2}} \right)}}\)
3
\(\frac{{\left( {{L_1}{L_2} - {M^2}} \right)}}{{\left( {{L_1} + {L_2} + 2M} \right)}}\)
4
\(\frac{{\left( {{L_1}{L_2} - {M^2}} \right)}}{{\left( {{L_1} + {L_2} - 2M} \right)}}\)
5
Question Not Attempted