Physical Science - Unit 2: Test Review

What is the unit for current?

• Watts

• Ohms

• Volts

• Amperes

What is the unit for resistance?

• Watts

• Ohms

• Volts

• Amperes

The flow of electricity (electrons)  through a circuit (or conductor) is called:

• Resistance

• Voltage

• Current

A material where electrons can flow freely is called a:

• Insulator

• Conductor

• Resistor

• Lightbulb

A material where electron cannot flow freely is called a:

• Insulator

• Conductor

• Resistor

• Lightbulb

What are the three ways to transfer charge?

• Friction, insulator, and conduction

• Friction, conduction, and polarization

• Friction, polarization, and conductor

• Friction, resistor, and polarization

Which one is NOT true about magnets:

• Magnets have a north and a south pole

• Like poles repel, opposite poles attract

• Magnetic force is exerted through the magnetic field

• Magnetic force is exerted through the electric field

One way to increase the strength of an electromagnet is to:

• Decrease the number of coils in the solenoid

• Stack a couple straight wires together

• Add a ferromagnetic material to the middle of the solenoid coil

• Lower the current running through the wire

Ohm's Law is an equation that explains the realtionship between: voltage, current, and _______.

A parallel circuit has ______ loop(s) whereas a series circuit only has _____ loop(s).