There are 163 windings around a cylinder made of a non-magnetic material. The cylinder has a radius r 4.1 cm and a length L- 7m. The resistance of a sufficiently long cylinder (r << L) is R=22. The applied voltage is Eo = 5 V at the initial moment (t= 0). At the time t = 8s what is the value of the voltage E, in units of mega-volts that must be applied to the ends of the solenoid, in order for the current to increase directly proportional with time t? (Take 4o = 4n x 10 7T. m/A and r= 3.14.) O 3.18 O 18.44 O 9.54 O 6.36 O 14.31
There are 163 windings around a cylinder made of a non-magnetic material. The cylinder has a radius r 4.1 cm and a length L- 7m. The resistance of a sufficiently long cylinder (r << L) is R=22. The applied voltage is Eo = 5 V at the initial moment (t= 0). At the time t = 8s what is the value of the voltage E, in units of mega-volts that must be applied to the ends of the solenoid, in order for the current to increase directly proportional with time t? (Take 4o = 4n x 10 7T. m/A and r= 3.14.) O 3.18 O 18.44 O 9.54 O 6.36 O 14.31
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