(c30p5) In the figure a 140-turn coil of radius 5.00 cm and resistance 3.00 ? is
ID: 1262273 • Letter: #
Question
(c30p5) In the figure a 140-turn coil of radius 5.00 cm and resistance 3.00 ? is placed around a smaller diameter solenoid (d = 3.20 cm). The long solenoid in the figure has 240 turns per centimeter and carries a current of 1.40 A.
The current in the solenoid is reduced to zero and then increased to -1.40 A in a time of 6.00
(c30p5) In the figure a 140-turn coil of radius 5.00 cm and resistance 3.00 ? is placed around a smaller diameter solenoid (d = 3.20 cm). The long solenoid in the figure has 240 turns per centimeter and carries a current of 1.40 A. The current in the solenoid is reduced to zero and then increased to -1.40 A in a time of 6.00?10-2 s. What is the magnitude of the induced current in the outer coil while the solenoid current is being changed?Explanation / Answer
The induced emf is given as
e = - N (d? / dt )
N is number of turns ;
? is magnetic flux = BA;
where B is the magnetic field =
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