PS Ch. 17 Review Day

There is a repulsive force between two charged objects when

• their charges are of unlike sign.

• they have the same number of protons.

• their charges are of like sign.

• they have the same number of electrons.

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Electric force varies depending on the

• charge and distance between charged objects.

• charge and mass of charged objects.

• height and mass of charged objects.

• mass and distance between charged objects.

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Batteries typically have

• two positive terminals.

• two negative terminals.

• one positive and one negative terminal.

• no terminals.

An electric current is produced when charges are accelerated by an electric field to move to a position of potential energy that is

• Higher

• Lower

• Equal

• Infinite.

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Resistance is caused by

• internal friction.

• proton charge.

• electron charge.

• kinetic energy.

The SI unit of resistance is the

• Volt.

• Ampere

• Ohm

• Joule

What happens to the resistance of a superconductor when its temperature drops below the critical temperature?

• Resistance increases.

• Resistance doubles.

• Resistance drops to zero.

• Resistance is reduced by one half.

What happens to the overall resistance of a circuit when too many appliances are connected across a 120-V outlet?

• Resistance is increased.

• Resistance is decreased.

• Resistance remains the same.

• Resistance is zero.

When there is an equal amount of positive and negative charges on an object, the object is

• positively charged.

• neutral.

• negatively charged.

• Supercharged.

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Every charged particle produces a(n)

• negative charge.

• magnetic field.

• positive charge.

• electric field.