Multiple Choice
A single circular loop of wire has a radius of , and carries a current of . What is the maximum torque that could be experienced by this loop due to earth's magnetic field?
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28. Magnetic Fields and Forces
Force and Torque on Current Loops
Struggling with Physics?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
A square loop of wire has a side length of and carries a current. What is the size of its magnetic dipole moment?
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Verified step by step guidance1
Understand the concept of magnetic dipole moment, which is given by the formula \( \mu = I \times A \), where \( I \) is the current and \( A \) is the area of the loop.
Calculate the area \( A \) of the square loop. Since the side length of the square is 12 cm, convert this to meters: \( 12 \text{ cm} = 0.12 \text{ m} \). The area \( A \) is \( \text{side}^2 \), so \( A = (0.12 \text{ m})^2 \).
Substitute the values into the formula for the magnetic dipole moment: \( \mu = 10 \text{ A} \times A \).
Perform the multiplication to find \( \mu \), ensuring that the units are consistent (A⋅m²).
Compare the calculated magnetic dipole moment with the given options to identify the correct answer.
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