SSC JE Electrical Engineering 24 Jan 2018 Morning Paper

Question : 128 of 199

Marks: +1, -0

What will be the value of magnetic field intensity (in Amp–turns/m) of a 4 metre long coil, when the coil, when the coil has 220 turns and carrying a current of 0.4 A?

Validate

Solution:

Given data
l = 4 m
N = 220
I = 0.4 A
Now magnetic field intensity

H={NI}/\l={220×0.4}/4

= 22 AT/m

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