Questions
A long solenoid of 50 cm length having100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is:
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a
3.14 x 10−4T
b
6.28 x 10−5T
c
3.14 x 10−5T
d
6.28 x 10−4T
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Correct option is D
B=μ0nI=4πx10−7x1000.5x2.5=2πx10−4T=6.28x10−4TSimilar Questions
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?
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