### Ch33 - Department of Physics

```Chapter 33
A square conductor moves through a uniform
magnetic field. Which of the figures shows the
correct charge distribution on the conductor?
1) a
2) b
3) c
4) d
5) e
A square conductor moves through a uniform
magnetic field. Which of the figures shows the
correct charge distribution on the conductor?
1) a
2) b
3) c
4) d
5) e
Is there an induced current in this circuit? If so, what is its
direction?
1. Yes, clockwise
2. Yes, counterclockwise
3. No
Is there an induced current in this circuit? If so, what is its
direction?
1. Yes, clockwise
2. Yes, counterclockwise
3. No
A square loop of copper wire is
pulled through a region of
magnetic field. Rank in order,
from strongest to weakest, the
pulling forces F1, F2 , F3 , and F4
that must be applied to keep
the loop moving at constant
speed.
1.
2.
3.
4.
5.
F2 = F4 > F1 = F3
F3 > F2 = F4 > F1
F3 > F4 > F2 > F1
F4 > F2 > F1 = F3
F4 > F3 > F2 > F1
A square loop of copper wire is
pulled through a region of
magnetic field. Rank in order,
from strongest to weakest, the
pulling forces F1, F2 , F3 , and F4
that must be applied to keep
the loop moving at constant
speed.
1.
2.
3.
4.
5.
F2 = F4 > F1 = F3
F3 > F2 = F4 > F1
F3 > F4 > F2 > F1
F4 > F2 > F1 = F3
F4 > F3 > F2 > F1
A current-carrying wire is pulled away from a
conducting loop in the direction shown. As the
wire is moving, is there a cw current around the
loop, a ccw current or no current?
1. There is a clockwise current around the loop.
2. There is a counterclockwise current around the loop.
3. There is no current around the loop.
A current-carrying wire is pulled away from a
conducting loop in the direction shown. As the
wire is moving, is there a cw current around the
loop, a ccw current or no current?
1. There is a clockwise current around the loop.
2. There is a counterclockwise current around the loop.
3. There is no current around the loop.
A conducting loop is
halfway into a magnetic
field. Suppose the magnetic
field begins to increase
rapidly in strength. What
happens to the loop?
1. The loop is pushed upward, toward the top of the page.
2. The loop is pushed downward, toward the bottom of the page.
3. The loop is pulled to the left, into the magnetic field.
4. The loop is pushed to the right, out of the magnetic field.
5. The tension is the wires increases but the loop does not move.
A conducting loop is
halfway into a magnetic
field. Suppose the magnetic
field begins to increase
rapidly in strength. What
happens to the loop?
1. The loop is pushed upward, toward the top of the page.
2. The loop is pushed downward, toward the bottom of the page.
3. The loop is pulled to the left, into the magnetic field.
4. The loop is pushed to the right, out of the magnetic field.
5. The tension is the wires increases but the loop does not move.
The potential at a is higher than the potential at b.
Which of the following statements about the
inductor current I could be true?
1.
2.
3.
4.
5.
I flows from a to b and is steady.
I flows from a to b and is decreasing.
I flows from b to a and is steady.
I flows from b to a and is increasing.
I flows from a to b and is increasing.
The potential at a is higher than the potential at b.
Which of the following statements about the
inductor current I could be true?
1.
2.
3.
4.
5.
I flows from a to b and is steady.
I flows from a to b and is decreasing.
I flows from b to a and is steady.
I flows from b to a and is increasing.
I flows from a to b and is increasing.
Rank in order, from largest to smallest, the time constants
of these three circuits.
1.
2.
3.
4.
5.
τ1 > τ2 > τ3
τ2 > τ1 > τ3
τ2 > τ3 > τ1
τ3 > τ1 > τ2
τ3 > τ2 > τ1
Rank in order, from largest to smallest, the time constants
of these three circuits.
1. τ1 > τ2 > τ3
2. τ2 > τ1 > τ3
3. τ2 > τ3 > τ1
4. τ3 > τ1 > τ2
5. τ3 > τ2 > τ1
Chapter 33
Currents circulate in a piece of metal that is pulled through
a magnetic field. What are these currents called?
1. Induced currents
2. Displacement currents
4. Eddy currents
5. This topic is not covered in Chapter 33.
Currents circulate in a piece of metal that is pulled through
a magnetic field. What are these currents called?
1. Induced currents
2. Displacement currents
4. Eddy currents
5. This topic is not covered in Chapter 33.
Electromagnetic induction was discovered by
2. Henry.
3. Maxwell.
5. All three.
Electromagnetic induction was discovered by
2. Henry.
3. Maxwell.
5. All three.
The direction that an induced current flows
in a circuit is given by
2. Lenz’s law.
3. Henry’s law.
4. Hertz’s law.
5. Maxwell’s law.
The direction that an induced current flows
in a circuit is given by