A) A current is induced by moving a magnet in and out of a coil of wire. What will happen to the induced current if you move the magnet twice as fast? (1 point)
Nothing, The induced current will not change.
The induced current will decrease.
The induced current will increase.
The induced current will change directions.
A) A student connects a battery to a light bulb using wires, creating a closed simple circuit. The student connects an ammeter to the circuit and places a compass next to the wires. The student then decides to connect a second battery to the circuit. Which statement describes the changes that will occur after connecting the second battery? (1 point)
The compass will detect an increase in current, and the ammeter will detect a stronger magnetic field.
The ammeter will detect an increase in current, and the compass will detect a stronger magnetic field.
The compass will detect an increase in current, and the ammeter will detect a weaker magnetic field.
The ammeter will detect an increase in current, and the compass will detect a weaker magnetic field.
A) A student is comparing a step-up transformer with a step-down transformer. Which data should she collect from each device? (1 point)
the ratio of incoming and outgoing voltages
the ratio of the number of turns in the secondary coils
the ratio of the number of turns in the primary coils
the ratio of incoming and outgoing currents

A) What happens to a copper wire when it is moved across a magnetic field? (1 point)
It is attracted to the negative pole of the magnetic field.
Electric current is induced, but not voltage.
Voltage and electric current are induced.
It is attracted to the positive pole of the magnetic field.
A) Which of the following is required in order for a copper wire to create a magnetic field? (1 point)
A power source such as a battery.
Electrons that are attracted to each other.
Magnets that can help the electrons move.
An ammeter to measure the strength of the current
A) Which of the following is true about electricity and magnetism? (1 point)
The creation of an electric current or magnetic field depends on the movement of electrons.
Magnets can induce electric currents only when using the north pole of the magnet.
The free flow of protons down a copper wire causes an electric current that can create a magnetic
field.
Attractive and repulsive forces between charged particles prevent them from creating electric currents or magnetic fields.
A) Why is an electric current only produced if there is a closed circuit? (1 point)
Without a closed circuit, electrons cannot flow from one point to another.
A closed circuit allows magnets to move back and forth, creating an electric current.
An open circuit causes electrons to escape the wire, stopping the electric current.
With an open circuit, the magnetic field created would cause the current to stop flowing.
A) A student is designing a setup where a magnetic field will induce an electric current. Which of
the following must they include in their apparatus? (1 point)
A stationary magnet
An open circuit
An ammeter
A battery
A) In a transformer, there is a primary voltage of 130V and a secondary voltage of 50V. If there are
5 turns in the secondary coils, how many turns are in the primary coils? (1 point)
13
2
900
36

A) In a transformer, there is a primary voltage of 70V and a secondary voltage of 210V. Which statement best describes this transformer? (1 point)
It’s a step-up transformer because the secondary voltage is greater than the primary voltage.
It’s a step-up transformer because the primary voltage is greater than the secondary voltage.
It’s a step-down transformer because the secondary voltage is greater than the primary voltage.
It’s a step-down transformer because the primary voltage is greater than the secondary voltage.
A) Which of the following statements about a motor is correct? (1 point)
In a motor, an electric current creates a magnetic field.
In a motor, a magnetic field induces an electric current.
In a motor, a magnetic current creates an electric field.
In a motor, an electric current induces a magnetic current.
A) How could you use a magnet to gather evidence that magnetic fields and electric currents have a causal relationship? (1 point)
Move the magnet through loops of wire
Move the magnet around a compass
Place a magnet close to a generator
Place a magnet close to a motor