KCET2014PhysicsMagnetic Properties of Matter
A solenoid has length ( 0.4 ~cm ), radius ( 1 ~cm ) and ( 400 ) turns of wire. If a current of ( 5 ~A ) is passed through this solenoid, what is the magnetic field inside the solenoid?
Options
- A( 6.28 10⁻⁴ ~T )
- B( 6.28 10⁻³ ~T )
- C( 6.28 10⁻⁷ ~T )
- DNone of the above
Correct answer
D. None of the above
Step-by-step solution
Given, length of solenoid =0.4 ~cm =0.4 10⁻² ~m ; radius =1 ~cm =10⁻² ~m ; number of turns =400 ; current through solenoid =5 ~A . Therefore, magnetic field inside solenoid = ₀ n I=4 10⁻⁷ 400 0.4 10⁻² 5=0.628 ~T