How will the magnetic field intensity at the centre of a circular coil carrying current change,if...
Homework Answers
Magnetic field intensity is directly proportional to the current. Therefore, if the current is
doubled, the magnetic field intensity will also be doubled. The field intensity is inversely
proportional to radius. Therefore, it will be twice when radius is halved. so it will be four times
Four times
B is directly proportional to current
and Inversely proportional to radius
Therefore when current is doubled B becomes double and radius is halved, B becomes double
Total four times
Magnetic field intensity is directly proportional to the current. Therefore, if the current is
doubled, the magnetic field intensity will also be doubled. The field intensity is inversely
proportional to radius. Therefore, it will be twice when radius is halved.
we know from the relation
B = (u_o x N x I/2pi x r)
when the current is doubled and the radius is halved then we have
B1 = (u_o x N x 2I/2pi x (r/2)) = (4u_o x N x I/2pi x r) = 4B
therefore the magnetic field inetnsity increases by four times
the original value
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