Question

Why resistance increases with increase in magnetic field?

Answer 1

$\huge\pink{As-Salamu-Alykum}$

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With increase in magnetic field current increases .

And ....

With increase in current resistance decrease because current and resistance have inverse relation .

V=IR

R=V/I

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$\huge\blue{INSHALLAH it will help U }$

Answer 2

$\huge\orange{ASSALAMUALAIKUM!}$

Since we all know that to increase the magnetic field we can do these of the following things:

(i) Increase the number of turns in a coil,

(ii) Increase the current following through conductor,

and there would be more but I know only these (upto my standard)

now if I use the first method to increase the magnetic field then the length of conductor will also increase because I am increasing the number of turns; say I am increasing the length of conductor by xxx meters then as we all know that:

R=ρl/aR=ρl/aR=ρl/a

you know resistance is equal to resistivity multiplied by length of conductor and then divided by the area of cross section.

According to this R is directly propotional to length of conductor and by Ohm's law R is inverously proportional to current

Therefore if I increase the length by xxx m of conductor then the resistance will also increase at a rate of xΩxΩxΩ and current will decrease at xxx Ampere

$\huge\pink{INSHAALLAH it will help you!}$