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A long solenoid has 20 turns per cm and ...

A long solenoid has 20 turns per cm and carries a current i. the magnetic field at its centre is `6.28xx10^(-2)Wb//m^(2)`. Another long solenoid has 100 turns per cm and it carries a current `i//3` . The value of the magnetic field at its centre is

A

`1.05 xx 10^(-4) Wb//m^2`

B

`1.05 xx 10^(-2) Wb//m^2`

C

`1.05 xx 10^(-5) Wb//m^2`

D

`1.05 xx 10^(-6) Wb//m^2`

Text Solution

Verified by Experts

The correct Answer is:
B
`B = mu_0 "ni"`
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NARAYNA-MOVING CHARGES AND MAGNETISM-EXERCISE - 1(H.W) (SOLENOID AND TOROID)
  1. A long solenoid has 20 turns per cm and carries a current i. the magne...

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