Physics Ch.3

A 100 W light bulb with an amperage of 0.91 A is operating at a potential difference of

100 volts. 11 kilovolts. 110 ohms.

A current of 2 amperes and a resistance of 8 ohms require what voltage in a series circuit?

16 volts

The amperage consists of ____________electrons per second.

6.24 x 1018

When the atomic valence and conductance bands overlap,

electrical flow easily occurs.

The flow of electrons at a rate of 6.24 10^18 per second represents:

1 ampere.

What is another term for a variable resistor

A.Filament

What type of current is used in x-ray transformers?

Alternating Current

•Current is measured in _________.

Amps

Objects that encourage the flow electrons and permit them to flow freely are called _______.

Conductors

Which of the following statements is TRUE

Electrical current flows from + to -

The distribution and movement of electrons is know as ______.

Electricity

In which direction do electrons flow in an electric circuit? (hint: there is more than one answer)

From - to + From an area of high concentration to low concentration

What method of electrification is used in the x-ray generator?

Induction

Objects that inhibit the movement of electrons are called _________.

Insulators

Resistance

Is higher in parallel circuits

Which law of electrostatics state that charges reside on the external surfaces of conductors and equally throughout nonconductors?

Law of distribution

What side of the x-ray generator is the mA selector on?

Low voltage

Which of the following statements is TRUE?

The length of a conductor has a direct relationship to resistance

According to Ohms law, if you decrease the Amps, what happens to voltage?

Voltage decreases because you don't have as many electrons

For electricity purposes, the earth is defined as the _________________.

Zero or ground potential

The milliampere (mA) is a unit of

current

The resistance in a wire decreases as its

diameter increases.

Neon lights illustrate the fact that electrons will flow

in a gaseous environment.

An electric circuit that send electrons through various resistance devices by giving each component its own branch is called a __________ circuit.

parallel

The force or strength of electron flow is described as ____________.

potential difference

An electric circuit designed to send electron through various resistance devices by linking them one after the other is a _____________ circuit.

series

The unit of electrical power is the

watt