Electricity

What force causes two metals to repel or attract?

• Friction

• Gravity

• Magnetism

• Electricity

The space around a magnet where the force of the magnet can act is called-

• static electricity

• lightning

• a magnetic field

• resistance

Many electrical wires are wrapped with a plastic coating because plastic is -

• More dense than copper

• Able to keep its shape

• Less expensive than steel

• A good insulator

Which would make the strongest electromagnet?

• A battery with 4 wire coils around a nail

• A battery with 6 wire coils around a nail

• A battery 10 wire coils around a nail

• A battery with 8 wire coils around a nail

Lightning is an example of _________.

• static electricity
• current electricity
• watts
• voltage

What is a closed path for electrons to flow through?

• static electricity
• circuit
• amperes

Electric current is measured in ______.

• Watts
• Volts
• Amperes

As the resistance in a circuit increases, the electric current __________.

• increases
• decreases
• stays the same

Which formulas represents Ohm's law?

• V=IR
• R=IV
• I=RV

Two types of circuits are

• parallel and magnetic
• electromagnetic and series
• series and parallel