Back to MAGNETIC EFFECT OF CURRENT

NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

1 Medium

1 of 1

Application +4 | -1

A tangent galvanometer has a coil of 25 turns and a radius of 15 cm. The horizontal component of the earth’s magnetic field is

3 \times {10^{ - 5}}

T. The current required to produce a deflection of 45

^ \circ

in it is

View answer and explanation

Correct option: A

0.29 A

Option A (0.29 A) is correct because it is the current value calculated using the tangent galvanometer formula with the given parameters.

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} }