Calculating Force and Torque on Electric Motor Coil

AI Thread Summary
The discussion focuses on calculating the maximum force and torque on a square coil in an electric motor, given its specifications. The coil has 20 turns, an area of 150 cm², and operates in a 300 mT magnetic field with a 5.00 A DC current. Participants clarify that the coil's dimensions and turns must be accurately understood to apply the correct formulas. There is confusion regarding the calculation of the coil's length and the number of loops, prompting a suggestion to start with the appropriate equations. The conversation emphasizes the importance of correctly interpreting the problem to arrive at the solution.
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Homework Statement



An electric motor has a square coil with 20 turns and an area of 150cm^2. the coil is free to rorate in uniform magnetic field of 300mT. If there is a DC current of 5.00A, passing through the coil: what is the maximum force on one side of the coil? and what is the maximum torque on the coil?

Homework Equations





The Attempt at a Solution


well i realized that there are 5 loops of this coil, i also figured that each turn is 7.5cm long. (150/4) = 37.5 (37.5/5) = 7.5cm, and I am not sure where to go from here.
 
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welcome to pf!

hi gaimesh! welcome to pf! :smile:
gaimesh said:
An electric motor has a square coil with 20 turns and an area of 150cm^2. the coil is free to rorate in uniform magnetic field of 300mT. If there is a DC current of 5.00A, passing through the coil: what is the maximum force on one side of the coil? and what is the maximum torque on the coil?
…
well i realized that there are 5 loops of this coil, i also figured that each turn is 7.5cm long. (150/4) = 37.5 (37.5/5) = 7.5cm, and I am not sure where to go from here.

uhh? there are 20 loops … and you can't divide an area by 4 to get a length! :rolleyes:

try again, and start by writing out the formula you wish to use :smile:​
 

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