NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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Application +4 | -1

A tangent galvanometer has a coil with 50 turns and radius equal to

4\;cm

. A current of

0.1\;A

is passing through it. The plane of the coil is set parallel to the earth’s magnetic meridian. If the value of the earth’s horizontal component of the magnetic field is

7 \times {10^{ - 5}}tesla

tesla and

{\mu _0} = 4\pi \times {10^{ - 7}}weber/amp \times m

, then the deflection in the galvanometer needle will be

View answer and explanation

Correct option: B

48.2^\circ

Option B (

48.2^\circ

) is correct because it is calculated using the tangent law for a tangent galvanometer:

B = B_H \tan{\theta}

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}

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