Chapter 6 electricity

The attractive force between two unlike charges has the same strength as the repulsive force between two like charges.

TRUE

The electrical force is much weaker than the force of gravity.

FALSE

An object becomes positively charged by gaining protons.

FALSE

If you double the distance between two charged objects, you reduce the electrical force by a factor of four,.

TRUE

The volt is a measure of the difference in electrical potential energy between two points.

TRUE

The reading on your electric bill shows the amount of power you have consumed in a month.

FALSE

The north end of a suspended magnet will point to Earth's magnetic north pole.

TRUE

Charge moving through a wire produces a magnetic field around the wire.

TRUE

Electrons move from the power plant to homes in an alternating current.

FALSE

Thomas Edison argued that our electrical system should use direct current because he felt that alternating current was dangerous.

TRUE

A neutral atom that gains one or more electrons is called a(an)

negative ion.

The unit of electric charge is called a(an)

Coulomb

Electric field lines are drawn

show the direction a test charge would move

The unit of electric potential difference between two points is

a volt.

When a switch is closed in a DC electrical circuit,

All of the above

An electric current is measured in units of

amp

An electric current is a(an)

flow of charge.

What is it that travels through an electric circuit at near the speed of light?

electric field

The resistance of a wire depends on

All of the above

If you multiply amp X ohm, the answers will be in units of

potential

Which of the following unit is actually a measure of a rate?

amp

Electrical resistance is a property of conductors that is measured in units of

ohm

Electric power is measured in units of

watts

Consider an electrical transformer has 10 loops on its primary coil and 20 loops on its secondary coil. What is the voltage in the secondary coil if the primary coil is supplied with 120 V?

240 V

Consider an electrical transformer has 10 loops on its primary coil and 20 loops on its secondary coil. What is the current in the secondary if the current is the primary coil is 5.0 A?

2.5 A

If you were to mechanically fotate the armature in an electric motor

nothing would happen.

The rate of flow of electric charge is measured in

amperes.

Ohm's law states

that the current in a circuit increases if the potential difference increases.

The natural magnetic field surrounding Earth

surrounding is produced by moving charges.

An electric field

is always present around an electron.