Look at the circuit diagram.
How many switches does the diagram show?
one
two
three
four
The number of switches shown in the circuit diagram cannot be determined as it is not described or attached in the given question.
Two bar magnets are held close together. When they are released, they move toward one another. Which best describes the original placement of the magnets?
The magnets are placed end to end with the north pole of each pointing toward the other.
The magnets are placed end to end with the south pole of each pointing toward the other.
The magnets are placed side by side with the like poles of each magnet near the other.
The magnets are placed side by side with the opposite poles of each magnet near the other.
The magnets are placed side by side with the opposite poles of each magnet near the other.
Measurements of two electric currents are shown in the chart.
Which best compares the two currents?
Current X has a greater potential difference, and the charges flow at a slower rate.
Current Y has a greater potential difference, and the charges flow at a slower rate.
Current X has a greater potential difference, and the charges flow at a faster rate.
Current Y has a greater potential difference, and the charges flow at a faster rate.
Without the chart or any specific values, it is not possible to determine which current has a greater potential difference or whether the charges flow at a slower or faster rate.
Liang is working with an electrical circuit. She replaces a straight electrical wire with a coiled wire.
What is Liang most likely trying to do?
increase the strength of the magnetic field when current flows through the circuit
decrease the strength of the magnetic field when current flows through the circuit
increase the current that flows through the wire when the circuit is active
decrease the current that flows through the wire when the circuit is active
Liang is most likely trying to increase the strength of the magnetic field when the current flows through the circuit.
Dr. Eriksson is working on a material called selenium. She is adding a certain number and type of atoms to the selenium, which will control its conductivity.
Selenium is most likely what kind of material?
semiconductor
conductor
superconductor
insulator