1) A circular coil enclosing an area of 100 cm2 is made of 200 turns of copper w
ID: 1311098 • Letter: 1
Question
1) A circular coil enclosing an area of 100 cm2 is made of 200 turns of copper wire, as shown below. Initially, a 1.10-T uniform magnetic field points in a perpendicular direction upward through the plane of the coil. The direction of the field then reverses. During the time the field is changing its direction, how much charge flows through the coil if R= 5.00 ohms?
2) When the switch S in the circuit below is closed, a current is setup in the
coil and the metal ring springs upward. Explain in detail this behavior, including a
drawing with clear labels of any magnetic fields or currents present.
3): A bar of mass m, length d, and resistance R slides without friction on
parallel rails as shown in the figure below. A battery that maintains a constant emf E is
connected between the rails, and a constant magnetic field B is directed perpendicular to
the plane of the page. If the bar starts from rest, show that at time t later it moves with a
speed
Explanation / Answer
The area is A = 100 x 10^-4 m
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