• #### 1.  Which two areas of physical science are closely related to the development of electric motors and generators?

• sound and light
• electricity and sound
• light and magnetism
• electricity and magnetism

• Ohms
• Omega
• Volts
• Amps

• 50Ω
• 100Ω
• 150Ω
• 200Ω

• 60Ω
• 120Ω
• 180Ω
• 240Ω
• #### 5.  As the resistance in a circuit increases, the electric current __________.

• increases
• decreases
• stays the same
• #### 6.  The strongest part of a magnet is...

• the bars.
• the force field.
• the poles.
• the middle.

• 10Ω
• 20Ω
• 30Ω
• 40Ω

• 1A
• 1.2A
• 1.4A
• 1.6A
• #### 9.  This contains a piece of metal that melts if it gets too hot in order to open a circuit.

• conductor
• insulator
• fuse
• circuit breaker

• electron
• negative
• neutral
• positive

• Ohms
• Omega
• Volts
• Amps
• #### 12.  Alexandra was preparing to go on a hike in the woods. She gathered the equipment she would need and placed it on the kitchen counter. By chance, she placed her compass near an electrical outlet. Although the compass was not moving, the compass needle turned because ______.

• the electric current in the outlet produced a magnetic field
• the compass could only be used outdoors
• the kitchen counter was made of a magnetic substance
• the kitchen had a microwave oven
• #### 13.  Which of the following will decrease the strength of the magnetic field around a wire?

• increasing the current flowing through the wire
• using less loops around the iron core
• flipping the direction of the current flowing through the wire
• using a larger iron core

• 0.5A
• 1A
• 1.5A
• 2A

• 10V
• 50V
• 100V
• 150V
• #### 16.  Electric charges always flow from _____ areas to _____ areas.

• positive; negative
• negative; positive
• neutral; negative
• neutral; positive

• 1.98 V
• 0.000198 V
• 5050 V
• 100.0198 V

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

• shape
• color
• pole
• region
• #### 20.  This exerts a force that causes other electric charges to move.

• electrical poles
• electrical fields
• insulators
• conductors
• #### 21.  In a closed circuit containing one resistor and a battery, if the voltage in the battery increases, the current going through the resistor increases. Why does this occur?

• As the electrons are sped up, they bunch closer together.
• As the electrons have more energy, they vibrate more rapidly.
• As the electrons are pushed more by the battery, they move faster through the circuit.
• As the distance around the circuit increases, the electrons take longer to travel around.
• #### 22.  The force or push that causes electric charges to move is called ______ .

• resistance
• voltage difference
• static electricity
• current
• #### 23.  Which circuit below contains the greatest voltage?

• A circuit with a current of 20 amps and a resistance of 16 ohms
• A circuit with a current of 10 amps and a resistance of 10 ohms
• A circuit with a current of 25 amps and a resistance of 16 ohms
• A circuit with a current of 20 amps and a resistance of 10 ohms

• 1.8 amps
• 45 amps
• 0.022 amps
• 8.8 amps

• 5A
• 15A
• 25A
• 35A
Report Question
access_time