The diagram shows a vertical square coil whose plane is at right angles to a horizontal uniform magnetic field B. A current, I, flows in the coil, which can rotate about a vertical axis O0'. Which one of the following statements is correct? A. The forces on the two vertical sides of the coil are equal and opposite. B. A couple acts on the coil. C. No forces act on the horizontal sides of the coil. D. If the coil is turned through a small angle about OO', it will remain in position.
The diagram shows a vertical square coil whose plane is at right angles to a horizontal uniform magnetic field B. A current, I, flows in the coil, which can rotate about a vertical axis O0'. Which one of the following statements is correct? A. The forces on the two vertical sides of the coil are equal and opposite. B. A couple acts on the coil. C. No forces act on the horizontal sides of the coil. D. If the coil is turned through a small angle about OO', it will remain in position.
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Transcribed Image Text:The diagram shows a vertical square coil whose plane is at right angles to a horizontal uniform magnetic
field B. A current, I, flows in the coil, which can rotate about a vertical axis 00'.
Which one of the following statements is correct?
A. The forces on the two vertical sides of the coil are equal and opposite.
B. A couple acts on the coil.
C. No forces act on the horizontal sides of the coil.
D. If the coil is turned through a small angle about O0', it will remain in position.
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