I don't get this question

timer Asked: Jan 30th, 2016

Question description

11.The current in an air-core solenoid is reduced from 3.99 A to zero over 5.9s. The 

solenoid has 2000 turns per meter and a cross-sectional area of 0.131 m2. 

Surrounding the solenoid near the center of its length is a second coil of 50 turns. 

What is the magnitude of the induced emf in the second coil? If the resistance of the 

second coil is 0.00409 ohm what is the induced current.


what's up with 2000 turn per meter ??

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