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3 cards from this section. Quick, good the night before a test.
What is the formula for torque on a current loop in a magnetic field?
Remember the key elements: number of turns, current, area, and magnetic field.
What does the term n represent in the torque formula?
Think about how many times the wire is looped.
What is the unit of torque?
What do we measure rotational forces in?
Torque is maximized when the angle θ is:
Think about where sine reaches its highest value.
A rectangular loop with dimensions 0.2 m x 0.4 m carries a current of 3 A in a uniform magnetic field of 0.5 T. Calculate the maximum torque the loop can experience when oriented at the optimal angle.
Don’t forget to calculate the area of the loop first!
If the same loop is now tilted to an angle of 60 degrees, what is the torque experienced by the loop?
Calculate sin(60) carefully, it's a common angle!
6 more questions in this section. Enroll free to practise them all.
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