1
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

An electric current I enters and leaves a uniform circular wire of radius r through diametrically opposite points. A charged particle q moves along the axis of circular wire passes through its centre at speed v. The magnetic force on the particle when it passes through the centre has a magnitude.

A
$${{qv{\mu _0}I} \over {2\pi r}}$$
B
$$qv{{{\mu _0}I} \over {\pi r}}$$
C
$${{qv{\mu _0}I} \over r}$$
D
0
2
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

Two particles A and B of masses mA and mB respectively, are having same charge and moving on same plane. A uniform magnetic field exists perpendicular to this plane. The speeds of the particles are vA and vB respectively and the trajectories are as shown in figure. Then,

BITSAT 2021 Physics - Moving Charges and Magnetism Question 2 English

A
mA = mB and vA = vB
B
mAvA > mBvB
C
mA < mB and vA < vB
D
mAvA < mBvB
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