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NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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Consider the following statements regarding a charged particle in a magnetic field

(i) starting with zero velocity, it accelerates in a direction perpendicular to the magnetic field.

(ii) while deflecting in the magnetic field, its energy gradually increases.

(iii) only the component of magnetic field perpendicular to the direction of motion of the charged particle is effective in deflecting it.

(iv) direction of deflecting force on the moving charged particle is perpendicular to its velocity.
Amongst these statements,

View answer and explanation

Correct option: C

(i), (iii) and (iv) are correct

Option C is correct. A charged particle accelerates perpendicular to the field if starting from rest, the magnetic field only deflects, and the deflecting force is perpendicular to velocity.

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} }