A 2 m long solenoil with diameter 2 cm and 2000 turns has a secondary coil of 1000 turns wound closely near its midpoint. The mutuat inductance betwee
A 2 m long solenoil with diameter 2 cm and 2000 turns has a secondary coil of 1000 turns wound closely near its midpoint. The mutuat inductance between the two coils is.
A. `2.4xx10^(-4)H`
B. `3.9xx10^(-4)H`
C. `1.28xx10^(-3)H`
D. `3.14xx10^(-3)H`
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Correct Answer - B
Here, `l=2=1 cm =1xx10^(-2)m`
Mutual inducatance, `mu_(0)N_(1)N_(2)A/(l)`
`(4pixx10^(-7)xx2000xx1000xx3.14xx10^(-4))/(2)`
`3.9xx10^(-4)H`
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