physical science ch 8

Current in a conductor can be increased by A- increasing the voltage across it. B- reducing its resistance. C- both of these D- neither of these

C- both of these

The electrical force between electric charges depends only on their A- separation distance. B- magnitude. C- both of these D- neither of these

C- both of these

A balloon will stick to a wooden wall if the balloon is charged A- negatively. B- positively. C- either of these D- neither of these

C- either of these

When Eddie Electron experiences an electrical shock, the source of electrons composing the shock is A- Eddie's body. B- the power plant. C- the ground beneath Eddie's feet. D- electric field in the air. E- whatever electric device being handled.

A- Eddie's body.

Electrons flow in a wire when there is A- a potential difference across its ends. B- an imbalance of charges in the wire. C- a difference in potential energy across its ends. D- none of the above

A- a potential difference across its ends.

For electric current in the home, your power company supplies A- energy. B- electrons. C- both of these D- neither of these

A- energy.

As more lamps are connected in a parallel circuit, the overall current in the power source A- increases. B- stays the same. C- decreases.

A- increases.

Heat a copper wire and its electric resistance A- increases. B- decreases. C- remains unchanged.

A- increases.

An electrically charged atom is an A- ion. B- isotope. C- both of these D- neither of these

A- ion.

If two copper wires of the same length have different thickness, then the thicker wire has A- less resistance. B- more resistance. C- both the same

A- less resistance.

When two lamps are connected in series to a battery, the electrical resistance that the battery senses is A- more than the resistance of either lamp. B- less than the resistance of either lamp. C- none of these

A- more than the resistance of either lamp.

To say that electric charge is conserved means that no case has ever been found where A- net charge has been created or destroyed. B- the total charge on an object has changed. C- the total quantity of charge on an object has increased. D- quantity of negative charge on an object exactly balances positive charge. E- none of the above

A- net charge has been created or destroyed.

Direct current is normally produced by a A- generator. B- battery. C- both of these D- neither of these

B- battery.

Lillian safely touches a 100,000-volt Van de Graaff generator. Although the voltage is high, the relatively small amount of charge means a relatively small amount of A- electric field. B- energy transfer. C- polarization. D- conduction.

B- energy transfer.

To become a negative ion, an atom must A- gain a proton. B- gain an electron. C- lose an electron. D- lose a proton.

B- gain an electron.

In an electrically neutral atom the number of protons in the nucleus is equal to the number of A- both electrons and neutrons. B- neutrons in the nucleus. C- electrons that surround the nucleus. D- none of the above

C- electrons that surround the nucleus.

Rub electrons from your hair with a comb and the comb becomes A- discharged. B- positively charged. C- negatively charged.

C- negatively charged

The unit of electrical resistance is the A- ampere. B- volt. C- ohm. D- none of the above

C- ohm.

If electrons are stripped from an atom it becomes a A- molecule. B- different element. C- positive ion. D- negative ion.

C- positive ion.

Just as a sustained flow of water in a hydraulic circuit needs a pump, in electric circuits the flow of charge needs A- current. B- resistance. C- voltage.

C- voltage.