Circuits (Part 2)

Which material is commonly used to make wires in a circuit?

• Copper

• Plastic

• Aluminum

• Iron

What determines the resistance of an object in a circuit?

• Material, length, temperature, and thickness

• Voltage and current

• Type of energy source

• Shape of the object

What is the role of a resistor in a circuit?

• To reduce the flow of current

• To increase the voltage

• To convert electric energy to light

• To store electric energy

What does a load, such as a lightbulb, do in a circuit?

• Converts electric energy to another form of energy

• Stores electric energy

• Increases the flow of current

• Measures the voltage

What is the symbol for an energy source in a circuit diagram?

• + | -

• —

• O

• R

What causes the current to flow in a circuit?

• Voltage supplied by batteries or solar cells

• Resistance in the wires

• The load in the circuit

• The length of the wires

Which of the following could be loads in a circuit?

• 
• 
• 
• 

Loads on a circuit convert (a)   energy to some other form of energy, such as (b)   or (c)   energy. The light and LED convert electrical energy to light energy. The (d)   converts electrical energy to sound energy. The (e)   is used to carry electric current. It does not convert electrical energy to another form.

• electrical
• light
• sound
• speaker
• wire

Which of the following would be appropriate energy sources for a circuit?

• 
• 
• 
• 

The 9-volt battery, car battery, and solar cell could all supply voltage to a ​ (a)   . The ​ (b)   provides resistance to a circuit, so it is not an energy ​ (c)   .

• circuit
• resistor
• source

Tags

NGSS.MS-ETS1-1