Back to MAGNETIC EFFECT OF CURRENT

NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

1 Easy

1 of 1

Application +4 | -1

A tightly wound 100 turns coil of radius

10 \mathrm{~cm}

carries a current of

7 \mathrm{~A}.

The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as

4 \pi \times 10^{-7}

SI units):

View answer and explanation

Correct option: A

4.4 \mathrm{~mT}

Option A (

4.4 \mathrm{~mT}

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

More Questions from MAGNETIC EFFECT OF CURRENT

Practice All Chapter MCQs →

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} }