Question 9 5 pts A 1.0 m long solenoid of cross-sectional radius 8 cm has 1500 turns per meter. When the current in the solenoid is changing at the rate of 100 A/s: What is the self-induced emf in the solenoid O 2.5 V O 160 V O 47.3 V O 5.7 VQuestion 10 5 pts A series circuit contains a 12-V battery, a 2.0-ohm resistor, and a 3.0- mH inductor. If the switch to the battery is closed at t = 0, find the time required for the current in the circuit to reach 63% of its final value O 3.0 ms O 4.0 ms O 5.0 ms O 1.5 ms