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NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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S-I: A proton and an alpha particle having the same kinetic energy are moving in circular paths in a uniform magnetic field. The radii of their circular paths will be equal.

S-II: Any two charged particles having same kinetic energy are moving an circular paths in a uniform magnetic field

\vec{B}

in a direction perpendicular to

\overrightarrow{\mathrm{B}}

, will describe circular trajectories of equal radii.

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Correct option: B

S-I is correct and S-II is incorrect

Option B is correct. Statement I is correct because the radii are equal when kinetic energies are the same. Statement II is incorrect because the radii depend on the charge and mass of the particles.

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} }