Electricity Topic 1-3 Review

When a charged acetate strip and a similarly charged vinyl strip are brought together they will

• attract
• repel
• not affect each other
• both become negatively charged

What charge will a material take on if it loses electrons?

• positive
• negative
• no charge
• neutral

Materials that allow charges to flow through them are called

• unbalanced
• conductors
• insulators
• balanced

If a material is a good conductor, it must

• hold electrons tightly
• have no electrons
• hold its electrons loosely
• have neutral electrons

What instrument is used to measure very weak electrical currents?

• ammeter
• galvanometer
• ohmeter
• voltmeter

When a circuit is set up, the main purpose of the battery is to provide

• heat
• current
• resistance
• insulation

When you measure current, you are measuring the number of _______ that pass a point in one second.

• protons
• neutrons
• atoms
• electrons

This circuit component converts electricity into other forms of energy.

• load
• conductor
• switch
• control

The voltage of most household appliances is

• 240V
• 120V
• 9V
• 6V

What equation will give the resistance of a circuit?

• R=V/I
• R=I/V
• R=IV
• R=aD