NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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Two circular coils A and B with their centers lying on the same number of turns and cary equal currents in the same sense. They are separated by a distance, have different diameters but subtend same angle at a point

\mathrm{P}

lying on their common axis. The coil B lies exactly midway between coil

\mathrm{A}

and the point

\mathrm{P}

. The magnetic field at point

\mathrm{P}

due to coils

A

and

B

B_1

and

B_2

respectively

View answer and explanation

Correct option: D

\frac{\mathrm{B}_1}{\mathrm{~B}_2}=\frac{1}{2}

Option D (

\frac{\mathrm{B}_1}{\mathrm{~B}_2}=\frac{1}{2}

) is correct because the magnetic field is inversely proportional to the distance from the coil, and coil B is half the distance from P as coil A.

More Questions from MAGNETIC EFFECT OF CURRENT

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Which of the following statements is not true A current loop in a magnetic field Given below are two statements:
Statement (I): When currents vary with time, Newton’s third law is valid only if momentum carried by the electromagnetic field is taken into account.
Statement (II): Ampere's circuital law does not depend on Biot-Savart’s law.
In the light of the above statements, choose the correct answer from the options given below: The magnetic field due to current carrying a circular loop of radius

5 \mathrm{~cm}

at a point on the axis at a distance of

12 \mathrm{~cm}

from the center is

250 \mu \mathrm{T}

. The magnetic field at the center of the loop is The magnetic field

d \vec{B}

due to a small current element

d \vec{l}

at distance

\vec{r}

and element carrying current

i

is Three long straight conductors carry currents 4A, 2A and 3A into the plane of paper. A circular path is imagined to be enclosing these currents. The value of

\oint {\overrightarrow B .\overrightarrow {dl} }

b is