Force and Torque on Current Loops Video Lessons

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Problem: A uniform rectangular coil of total mass 270 g and dimensions 0.500m×1.00m is oriented parallel to a uniform 3.70-T magnetic field (Figure 1) . A current of 2.00 A is suddenly started in the coil.Find the initial angular acceleration of the coil just after the current is started.Express your answer using two significant figures.ANSWER = _________________ rad /S2

FREE Expert Solution

Magnetic torque:

τ=NBAi·sinθ

Torque:

τ=αI where I is the moment of inertia and α is the angular acceleration.

Moment of inertia of a rod about its center:

I=112ML2

Parallel axis theorem:

I=Icm+Md2

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Problem Details

A uniform rectangular coil of total mass 270 g and dimensions 0.500m×1.00m is oriented parallel to a uniform 3.70-T magnetic field (Figure 1) . A current of 2.00 A is suddenly started in the coil.

Find the initial angular acceleration of the coil just after the current is started.

Express your answer using two significant figures.

ANSWER = _________________ rad /S2



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