Honors Unit 10 Review

What changes in a parallel circuit?

• Current can change in the different branches depending on the resistance

• Voltage changes

What changes in a series circuit?

• Current / amperage drops in each resistor

• Voltage changes / drops in each resistor

What is true of voltage in a parallel circuit?

• Voltage remains the same throughout

• The voltage changes depending on energy demand in the circuit

• Current is the same as voltage in a parallel circuit

• If there are light bulbs, they will be progressively dimmer on each branch

At point x on the series circuit, the current will be:

• The same as the rest of the circuit

• Less than what it was at the first resistor

• 3x higher after running through the three resistors

A battery demonstrates this type of current:

• Alternating

• Direct

What would the current flowing through an alternator (a device that changes the flow of electrons at regular intervals) look like?

• Electrons moving in one direction only (DC)

• Electrons spiraling around the outside of a wire

• Electrons moving in one direction, then in the other direction (AC)

• Slow electron flow that can be captured and used later

Tags

NGSS.MS-PS2-3

What would adding more light bulbs do to this type of circuit?

• Reduce the amount of resistance

• Reduce the overall voltage, resulting in less intense lights

• Change nothing within the circuit

A battery with 3V is plugged into a circuit with 9 ohms of total resistance. What is the current in this circuit?

• 1

• 3 A

• 27 A

• 0.3 A

How does a maglev (magnetic levitation) train work?

• A large electromagnet generates a field that pulls the train to its' destignation

• electricity creates a magnetic field that pulls the train along the tracks

• opposite poles / like charges repel along the track, alternating current pulls the train

• Electricity causes a magnetic field opposite that of the train so it is repelled along the track

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If the resistance in the resistor increases from 3 to 6 ohms, but no change in voltage takes place, what happens to the current?

• It will increase by a factor of 2

• It will decrease by a factor of 2

• It will decrease by a factor of 6

• It will increase by a factor of 3