Question

A cylinder solenoid of radius 1 cm having 500 turns carries clockwise electric current 1 A....

A cylinder solenoid of radius 1 cm having 500 turns carries clockwise electric current 1 A. It is placed in the external magnetic field of strength1 T parallel to its axis. Work required to change the solenoid current to the counterclockwise, equals

A.

0.514 J

B.

7.28 J

C.

0.05 J

D.

13 eV

E.

None of the above

0 0
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Answer #1

T= IA X-0.01m N=500 turns B-17 -BA = 1X AX72 $ = 3.14(0.01) = 3.148 104 T m2 Work done = NOI 500 X 3.14x1024 xi 3 W = 0.1575

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