An ideal solenoid with n=50 turns/cm, radius r, and current I shares its axis with an aluminum ring of radius R. The coil acts as the resistance in an RC circuit that is being charged by a DC power supply of 15.0 V. If the resistance of the coil is 5.00 2 and the time constant for the circuit is 42.0 ms, (a) What is the current through the coil at time t = 50.0 ms? (b) 2r- Since the current through the coil is changing in time, the magnetic flux it creates is also changing. Indicate on the drawing the direction of the induced current in the aluminum ring at the same time t = 50.0 ms.. Determine the inductance per unit length 2R of the solenoid if r-10.0 cm, and R-18.0 cm. What further information, if any, is necessary to compute the value of the inducted emf in the ring at time t-50.0 ms? (c) (d) I

An ideal solenoid with n=50 turns/cm, radius r, and current I shares its axis with an aluminum ring of radius R. The coil acts as the resistance in an RC circuit that is being charged by a DC power supply of 15.0 V. If the resistance of the coil is 5.00 2 and the time constant for the circuit is 42.0 ms, (a) What is the current through the coil at time t = 50.0 ms? (b) 2r- Since the current through the coil is changing in time, the magnetic flux it creates is also changing. Indicate on the drawing the direction of the induced current in the aluminum ring at the same time t = 50.0 ms.. Determine the inductance per unit length 2R of the solenoid if r-10.0 cm, and R-18.0 cm. What further information, if any, is necessary to compute the value of the inducted emf in the ring at time t-50.0 ms? (c) (d) I