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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.

 

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Ankit Lal
Ankit LalLv10
19 Sep 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Magnetic information on hard drives is accessed by a read head that must move rapidly back and forth across the disk. The force to move the head is generally created with a voice coil actuator, a flat coil of fine wire that moves between the poles of a strong magnet, as in the figure. Assume that the coil is a square 1.0 cm on a side made of 210 turns of fine wire with total resistance of 1.4 ohm. The field between the poles of the magnet is 0.26 T; assume that the field does not extend beyond the edge of the magnet. The coil and the mount that it rides on have a total mass of 14 g.

Part A

If a voltage of 5.0 V is applied to the coil, what is the current?

Express your answer to two significant figures and include the appropriate units.

Part B

If the current is clockwise viewed from above, what is the direction of the net force on the coil?

If the current is clockwise viewed from above, what is the direction of the net force on the coil?

Part C

What is the magnitude of the net force on the coil?

Express your answer to two significant figures and include the appropriate units.

Part D

What is the magnitude of the acceleration of the coil?

Express your answer to two significant figures and include the appropriate units

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(b) The induced emf in the generator shown is zero at t = 0. What is the minimal time (in multiples of the period T, i.e. you solve for t/T) after which it has reached 15% of its maximum? Express your answer using two significant figures.
 
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