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A solenoid 600 mm long has 50 turns on i...

A solenoid 600 mm long has 50 turns on it and is wound on an iron rod of 7.5 mm radius. Find the flux through the solenoid when the current in it is 3 A. The relative permeability of iron is 600 :

A

1.66 Wb

B

1.66 nWb

C

1.66 m Wb

D

1.66 `mu` Wb

Text Solution

Verified by Experts

The correct Answer is:
C
`phi=mu_(r)mu_(0)N^(2)/lAi`
`" "=600 times 4pi times 10^(-7) times 50 times 50pi times (times (7.5 times 10^(-3))^(2) times 3)/(6 times 10^(-1))`
`=1.66 times 10^(-3)Wb=1.66 mWb`.
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