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- 1. Multiple Choice
Why are electrical cords covered in plastic or rubber?
because plastic and rubber are insulators which keeps us safe
because it looks nicer
because plastic and wire help conduct electricity
because wires are color coded based on voltage
- 2. Multiple Choice
A series circuit will continue to work if one of the light bulbs is unscrewed.
true
false
- 3. Multiple Choice
These magnets will...
attract
repel
nothing will happen
- 4. Multiple Choice
This is an example of what type of circuit?
simple
series
parallel
- 5. Multiple Choice
What device changes mechanical kinetic energy into electrical energy?
electric motor
insulator
electromagnet
generator
- 6. Multiple ChoiceWhat device changes electrical energy to mechanical energy?electromagnetelectric motorconductorgenerator
- 7. Multiple ChoiceWhat is the purpose of a switch in an electric circuit?to allow the circuit to be opened or closedto change the direction of the currentto provide a push for the currentto increase the electric power to the load
- 8. Multiple ChoiceEach time a lightbulb is added to a series circuit, the other bulbs in the circuitget brighterget dimmerstay the same brightnessrelease more heat
- 9. Multiple ChoiceA group of lights are connected in a parallel circuit. One of the lights is removed. The rest of the lights willget brighterget dimmergo outnot change
- 10. Multiple ChoiceA string of lights is lit. They are part of a series circuit. One of the bulbs is removed. The rest of the lights willgo outstay litget brighterget dimmer
- 11. Multiple ChoiceTo complete a circuit the switch must beunattachedopenclosed
- 12. Multiple ChoiceWhere is the strongest attraction force of the magnet?at the polesin the middleabove the magnetbelow the magnet
- 13. Multiple Choice
Which of the following represents Ohm’s law?
I = V / R
V = I x R
R = V x I
V = I / R
- 14. Multiple Choice
What is part C considered in the circuit?
power source
conductor
load/resistor
- 15. Multiple ChoiceWhat is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?25 V10 V2.5 V0.4 V
- 16. Multiple ChoiceThis circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?3 Amps192 Amps2 Amps4 Amps
- 17. Multiple ChoiceWhat size resistor would produce a 3 Amp current flow with a 12 Volt battery1 Ohm3 Ohms4 Ohms12 Ohms
- 18. Multiple Choice
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 has more than one path to flow through
- 19. Multiple ChoiceAn incomplete circuit is shown.
To complete the circuit, a wire should be placed from —Point D to Point CPoint B to Point CPoint A to Point DPoint B to Point D - 20. Multiple ChoiceThis circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -the switch gives energy to the batterythe buzzer is made of special plasticthe wires are cooled by the surrounding airelectricity can flow in a complete path - Answer choicesTagsAnswer choicesTags