The set of lettered choices below refers to multiple questions. Select the one lettered choice that best answers each question. A choice may be used once, more than once, or not at all in each set.
Which graph best represents the magnetic field measured at the center of a coil due to a steady current as a function of time?
Select an Answer
The correct answer is a steady non-zero magnetic field. The magnetic field at the center of a coil is directly proportional to the current in the coil. If the current remains constant over time so does the magnetic field.