WorksheetsElectromagnetic Induction
Total questions: 10
Worksheet time: 32mins
A straight wire, 0.5 m long, is moved straight up at a speed of 20 m/s through a 0.4T magnetic field pointed in the horizontal direction.
What EMF is induced in the wire?
8 volt
4 volt
2 volt
0 volt
A straight wire, 0.5 m long, is moved straight up at a speed of 20 m/s through a 0.4-T
magnetic field pointed in the horizontal direction.
The wire is part of a circuit of total resistance of 6.0 Ohms' .
What is the current in the circuit?
0.3 A
0.4 A
0.7 A
0 A
A straight wire, 2500 cm long, is mounted on an airplane flying at 125 m/s. The wire moves in a perpendicular direction through Earth’s magnetic field (B = 5.0x10-5 T).
What EMF is induced in the wire?
0.16 volt
0.10 volt
0.5 volt
0.2 volt
A permanent horseshoe magnet is mounted so that the magnetic field lines are vertical. If a student passes a straight wire between the poles and pulls it toward herself, the current flow through the wire is from right to left. Which is the north pole of the magnet?
The north pole is to the right
The north pole is to the left
The north pole is at the Top
The north pole is at the bottom
A copper wire of insignificant resistance is placed in
the center of an air gap between two magnetic
poles, as shown in Figure . The field is
confined to the gap and has a strength of 1.9 T.
Determine the force on the wire (direction
and magnitude) when the switch is
closed.
0.62 N , UP
0.62 N , Down
0.31 N, Up
0.31 N, Down
A wire is moved horizontally between the poles of
a magnet, as shown in Figure . What is the
direction of the induced current?
Maximum current is induced because the
direction of the velocity is perpendicular to
the magnetic field.
No current is induced because the
direction of the velocity is perpendicular perpendicular to
the magnetic field.
No current is induced because the direction of the velocity is parallel to
the magnetic field.
Maximum current is induced because the
direction of the velocity is parallel to
the magnetic field.
A segment of a wire loop is moving
downward through the poles of a magnet,
as shown in Figure .
What is the direction of the induced current?
The current direction is inward-to the page to
the Right along the path of the wire.
The current direction is out-of-page to
the left along the path of the wire.
The current direction is upward -of-page perpendicular the path of the wire.
The current direction is inward to the page perpendicular the path of the wire.
At what speed would a 20 cm length of
wire have to move across a 2.5 T magnetic
field to induce an EMF of 10 V?
20 m/s
10 m/s
5 m/s
2.5 m/s
You wish to generate an EMF of 4.5 V by
moving a wire at 4.0 m/s through a 50 mT
magnetic field. How long must the wire be,
and what should be the angle between the
field and direction of motion to use the
shortest wire?
10 m
50 m
12 m
23 m
A 40.0-cm wire is moved perpendicularly
through a magnetic field of 0.32 T with a
velocity of 1.3 m/s. If this wire is connected
into a circuit of 10.0 Ohm's resistance, what is
the current?
10 mA
17 A
17 mA
10 A
