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JEE PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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A very long conductor carries a current of 1 A. The magnetic field at a point whose distance is

0.1 \mathrm{~m}

from one end of the conductor is (in '

T

')

View answer and explanation

Correct option: A

10^{-6}

Option A (

10^{-6}

) is correct because the magnetic field is calculated using the formula

B=\frac{\mu_0 I}{4 \pi r}

.

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A needle made of bismuth is suspended freely in a magnetic field. The angle which the needle makes with the magnetic field is: Assertion: If a charged particles is moving in perpendicular uniform magnetic field, its kinetic energy does not change
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Y

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R_1

R_2

respectively. The ratio of mass of

{X}

{Y}