Rankers Physics
Topic: Magnetic Effects of Current
Subtopic: Ampere's Circuital Law

A solenoid consists of 100 turns of wire and has a length of 10.0cm. The magnetic field inside the solenoid when it carries a current of 0.500 A will be :
\[6.28\times 10^{-4} T\]
\[6.28\times 10^{-5} T\]
\[3.14\times 10^{-4} T\]
none of these

Solution:

\[ B= \mu_{0}ni \] where n is number of turns per unit length

n= 100/0.1=1000

i=0.5

substituting we get \[ B = 6.28\times 10^{-4} T\]

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