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5/30 MCQs for:
Magnetism
Which of the following is correct?
Two long parallel wires carry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?
An electron has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic field is:
A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field:
A vertical wire carries a current straight down. To the east of this wire, the magnetic field points: