ทบทวนวงจรไฟฟ้า

The picture shows an electrical circuit. This circuit is a series circuit because: 

• It has 3 light bulbs.
• The same current flows through all three light bulbs.
• It uses a single battery.
• The electrical current is divided between the three light bulbs.

This is the symbol for a _____?

• an AC current source
• a DC current source
• a battery
• a single cell

Which best describes a parallel circuit?

• Electricity flows along one pathway.
• The flow of electricity comes from one source. 
• Electricity flows along more than one pathway. 
• The flow of electricity comes from more than one source. 

In a parallel circuit if one of the light bulbs burns out the rest _________.

• stop the flow of electricity
•  can still light up
•  will go out
• of the light bulbs burn out also

Does this diagram represent a series or parallel circuit?

• series circuit
• parallel circuit

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

• 1 Ohm
• 3 Ohms
• 4 Ohms
• 12 Ohms

Calculate current if a charge of 10 Coulombs flows past a point in 5 seconds

• 2 Amps

• 50 Amps

• 0.5 Amps

The total resistance (RT) is equal to the sum of all of the resistances (i.e., R1 + R2 + R3) in a series circuit.

• True

• False

The sum of all of the voltage drops (VR1 + VR2 + VR2) is equal to the total applied voltage (VT) in a series circuit.

• True

• False

In order to have a functioning electric circuit, you must have _______________. (SELECT ALL THAT APPLY)

• an electric potential (power source)

• a switch

• a conductive pathway

• electrical resistance (light, motor, heating element, speaker)