Units 9 and 10 Revision

A material that allows electricity to flow is __________________.

• a conductor
• an insulator
• resistance
• a metal

What is the standard voltage difference of electrical energy entering homes in the United States?

• 120 V
• 12 V
• 220 V
• 1200 V

The word current means ____________________.

• a flow of electrons along a circuit in one direction
• the difference in electrical potential between two places along an electrical circuit
• the flow of electric charge
• a flow of electrons that is always changing directions

In which type of circuit does charge have only one loop to flow through?

• series
• parallel
• open
• uniform

A(n) _____ is a closed, conducting path.

• circuit
• current
• resistor
• ampere

The illustration shows a(n) _____.

• parallel circuit
• broken circuit
• open circuit
• series circuit

_____ is the tendency for a material to oppose the flow of electrons.

• Resistance
• Induction
• Transistance
• Conduction

The regions on a magnet where the magnetic force is strongest are called ______.

• Magnetic poles
• Magnetic lines
• Magnetic field
• Magnetic attraction

The moving ____________ in a speaker vibrates its cone and reproduces the sound recorded on the CD.

• electromagnets
• Screws
• Screens
• magnets

Electric current passing through a wire produces ________.

• a magnetic field around the wire
• a permanent magnet
• geographic poles
• a compass