Field at the centre of a circular coil of radius r, through which a current I flows is

Directly proportional to r

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Inversely proportional to I

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Directly proportional to I

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Directly proportional to

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Solution

The correct option is C
Directly proportional to I

Field at the centre of a circular coil of radius r is

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Similar questions

Q. The electric field due to a dipole at a distance r on its axis is

The correct relation between heat produced (H) and electric current (I) flowing is:

V=IR, from this equation it's clear that V is directly proportional to I and R..
I=V/R, from this equation it's clear that I is directly proportional to V and inversely proportional to R.
But when V is directly proportional to R and I is directly proportional to V then why is I not directly proportional to R?

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Q. V=IR
So, V is directly proportional to I
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So, V must be directly proportional to Q
But, V=W/Q
That means V is inversely proportional to Q........
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Field at the centre of a circular coil of radius r, through which a current I flows is

The correct option is C Directly proportional to IField at the centre of a circular coil of radius r is

The correct option is C
Directly proportional to I

Field at the centre of a circular coil of radius r is