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NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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Understanding +4 | -1

In a sufficiently long solenoid, the magnetic field at centre of its length (on axial point) is

{B}_1

and is

{B}_2

near the end of solenoid (on axial point). Find

B_1 / B_2

.

View answer and explanation

Correct option: A

2

Option A (2) is correct because the magnetic field at the center of a long solenoid is twice the magnetic field at its end.

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}

\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} }