NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:

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Correct option: C

\mathrm{12}\mathrm{.56} \times \mathrm{1}{\mathrm{0}^{ - 2}}\,\mathrm{T}

Option C (

\mathrm{12}\mathrm{.56} \times \mathrm{1}{\mathrm{0}^{ - 2}}\,\mathrm{T}

) is correct because it is calculated using the formula for the magnetic field at the center of a long solenoid.

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