(Solved):   In the figure, a 100-turn coil of radius \( 2.8 \mathrm{~cm} \) and resistance \( 7.2 \Ome ...

 

In the figure, a 100-turn coil of radius \( 2.8 \mathrm{~cm} \) and resistance \( 7.2 \Omega \) is coaxial with a solenoid of 190 turns \( / \mathrm{cm} \) and diameter \( 4.0 \mathrm{~cm} \). The solenoid current drops from \( 2.2 \) A to zero in time interval \( \Delta t=21 \mathrm{~ms} \). What current is induced in amperes in the coil during \( \Delta t \) ?