JEE Main 2022 · PhysicsMultiple choiceDiagram basedMediumMulti-step

JEE Main 28 July 2022, Shift 1, Physics Q43

Question 43 of 90 in this shift, Physics question 13 of 30, Section A.

As shown in the figure, a metallic rod of linear density

0.45\ \mathrm{kg\,m^{-1}}

is lying horizontally on a smooth inclined plane which makes an angle of

45^\circ

with the horizontal. The minimum current flowing in the rod required to keep it stationary, when 0.15 T magnetic field is acting on it in the vertical upward direction, will be : {Use

g=10\ \mathrm{m/s^2}

}

The figure, in words

Metallic rod lying horizontally across a smooth inclined plane inclined at 45 deg to the horizontal; current I flows along the rod; magnetic field B drawn vertically upward.

(1)30 AOfficial answer
(2)15 A
(3)10 A
(4)3 A

Official answer

Option 1

NTA final key (2022 Session 2).

Chapter: Moving Charges and Magnetism
Topic: No close match in our taxonomy
Idea tested: No close match in our taxonomy