First slide

Force on a current carrying wire placed in a magnetic field

Question

In the figure, the force on the wire ABC in the uniform magnetic field (B = 2 tesla) will be _____

Moderate

A

$4 (3 + 2 π) N$
B

20 N
C

30 N
D

40 N

Solution

Le = Equivalent length = Length $A C = \sqrt{3^{2} + 4^{2}} m = 5 m$
${F=iL}_{e} B=3× 5× 2N=30 N.$

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