Electricity

Two objects have collected static electricity with the same charge. What would the objects do when placed near each other?

• repel

• attract

• nothing

• stick together

Which form of electric discharge appears in nature?

• rain

• ocean currents

• lightning

• Volcanoes

If the charge of particle q1 is tripled, what will happen to the force between the charges? (consider coulomb’s law for this question)

• The force will triple

• The force will decrease by a factor of 3.

• The force will double.

• The force will decrease by a factor of 2.

You observe that a piece of tape is attracted to a negatively charged pen. What can you conclude about the tape?

• The tape could be negatively or positively charged

• The tape could be neutrally or positively charged.

• The tape could be negatively or neutrally charged.

• The tape is positively charged.

A metal sphere is charged by touching it with a charged rod. Which charging process was used?

• conduction

• friction

• induction

• Insulation

What are materials that prevent charges from moving freely called?

• balanced

• conductors

• insulators

• unbalanced

Why are electrical wires usually constructed of metals?

• Metals are commonly found in long, thin forms.

• Metals are often shiny and malleable.

• Metals do not provide an easy path through which electrons can travel.

• Metals have many loosely held electrons.

If the distance between two charges is quadrupled, what will happen to the force between the charges? (consider coulomb’s law for this question)

• The force increase by a factor of 4

• The force will decrease by a factor of 4.

• The force increases by a factor of 16.

• The force will decrease by a factor of 16.

What are the two kinds of electric charges?

• electron and neutron

• negative and proton

• neutral and charged

• positive and negative