PhysicsMedium55×since 2003Q668912 V12 \mathrm{~V}12 V battery connected to a coil of resistance 6Ω6 \Omega6Ω through a switch, drives a constant current in the circuit. The switch is opened in 1 ms1 \mathrm{~ms}1 ms. The emf induced across the coil is 20 V20 \mathrm{~V}20 V. The inductance of the coil is :A5 mH5 ~ \mathrm{mH}5 mHB8 mH8 ~\mathrm{mH}8 mHC10 mH10~ \mathrm{mH}10 mHD12 mH12 ~\mathrm{mH}12 mHCheck answerSkip