Equipment Final Review

Pascal's law explains how liquid pumps (such as the human heart or the brakes on your car) work: Applied pressure will be transmitted undiminished throughout any liquid because liquids:

resist compression

The energy that would be relased by complete annihilation of any particle of matter is referred to as the particles:

rest energy

Power loss is in the form of heat and is proportional to the:

square of amperage P=I2 R

Which of the following would not be classified as a dielectric:

steel

Which unit is equivalent to one 10-billonth of a meter?

the angstrom

When snow is forming from droplets of water in a cloud, the surrounding air:

is warmed

The SI unit for work and mechanical energy is the:

joule

The generic unit of energy is the:

joule

An x-ray machine has a 30 kilowatt (kW) generator . If the maximum kilovoltage avaliable is 150 kV , what will be the available tube current?

200 mA

At 110 volts EMF and a current of 5 amps , the electrical resistance much be:

22 ohms

In this diagram , how many positive pulses occur each second?

30

The interactions between all matter in the universe are governed by _______ different forces.

4

The secondary coil of a transformer has 20,000 turns ; the primary coild has 500 turns . If the 120 volts is supplied to the primary coil, what will be the resulting voltage in the secondary coil?

4800 volts

Like poles of a magnet will:

repel

40 ms = ____ seconds

0.04

Supermans gas krypton , has 36 electrons arranged in 4 "shells" how many electrons can it hold in its "M" shell:

18

If a circuit contains 30 ohms of resistance with 60 volts applied , the current flowing will be:

2 amps

Two positive 0.4 C charges are positioned 1 meter apart. the force between them is:

repulsive

1 Joule of work done on 1 coulomb of charge equals:

1 volt

Which of the following numbers is the same as 10 raised to the minus 6th power?

1/1,000,000

In this diagram, what is the length of time between points A and C?

1/120 second

A 60 watt lightbulb is turned on in your home with 120 volts of force supplied from the plug. The light bulb must be using:

1/2 amp of current

In most of Europe, the electricity supplied is 50 Hertz AC. How many times does the current stop and start in one second?

100

Approximately how many centimeters is the standard distance of the xray tube from the bucky when preforming a table top radiographic procedures?

120

A fluoroscopic examination is conducted using a 1.5 A (amperes) of electricity . that is equivalent to:

1500 mA

A flashlight holds two 1.5 volt batteries in series for a total EMF of 3 volts. The current flowing when the flashlight is turned on is 1/2 (0.5) amp . how much electrical resistance is being given by the flashlights bulb and wires?

6 ohms

The outermost "shell" of an atom can never hold more than _______ electrons in it.

8

Maximum electromagnetic induction will occur when a conductor (wire) moves through a magnetic field at what angle?

90 degrees

In any transformer, the change in amperage is always __________ the turns ratio of the transformer:

inversely proportional to

Which of the following is not a form of Ohms Law

I=VR

The degree to which various materials can be magnetized is called:

Magnetic susceptibility

The unit of force is the:

Newton

A parallel circuit is one in which:

two or more circuits are connected across different branches

Milliamperes is the unit to measure:

The flow rate of electrons in a circuit

In order for electrical current to flow there must be :

a closed conducting path and a potential difference

Anything that exerts a "push" or "pull" such that can it cause a change in motion of another body may be described as:

a force

The wavelength of xrays may be best describes as:

a fraction of an angstrom

Which of the following will create the most electrical resistance?

a long wire with a small diameter

In a common circuit, electrons actually move at speeds of:

about 2.5cm per hour

In electrical current, electrons always move rather than protons because by comparison, electrons :

all of the above

In a series circuit , what can NOT change throughout the circuit:

amperage

Which of the following does not belong in these terms?

ampere

An isotope is an atom which has:

an unusual number of nucleons

The molecules of a gas:

are not held in fixed positions relative to each other

The smallest unit of chemical compound is:

atom

Temperature measures the ________ of molecules.

average kinetic energy

In an induction motor:

both the rotor and the stator may have windings

In physics , which of the following is a fundamental unit (not a dervied unit):

centimeters

A battery converts:

chemical energy to electrical energy

The path over which an electric current flows is called a:

circuit

Electrical fields are always created inside:

conductors in moving magnetic fields

The greater the power rating of a device , the:

faster it does work

In the secondary coil of a transformer , induced electrical current will always flow in the opposite direction from the current supplied to the primary coil. This is:

is known as Lenz's law

The effect of electrical charges in motion through a conductor is referred to as:

current

For part of a circuit that has constant resistance, as voltage is increased:

current flow is increased

The direction of electrical current flow is traditionally defined by electricians as the:

direction of movement of a positive charge

Ohms law states:

electric current is the result of voltage divided by the resistance

To hold together the nucleus of an atom, the strong nuclear force must overwhelm:

electrical force

An an electron drops drops into a lower atomic shell , its positional form of potential energy is emitted as a ______ form of potential energy.

electromagnetic

An electrical current in a conductor consists of the flow of:

electrons

In this diagram, when comparing segment A to B with regards to electrons ----with segment B to C ; use the diagram of AC electricity below:

electrons are speeding up from A to B and slowing down from B to C

Ohms law states that the electrical current:

equals the voltage divided by the resistance

Anything which converts mechanical energy into electrical energy is an:

generator

In electrical circuits , one by-product of high resistance is:

heat

Condensation results in a:

increase in potential energy

Heating a substance can lead to two results ; It will either increase the temperature OR it will:

increase the potential energy

Materials that do not allow electrons to flow are:

insulators

Heat is defined as the flow of ______ from one substance to another:

internal energy

Which of the following represents the conversion of kinetic energy into potential energy:

lifting the book off of the table

A substance which occupies a definite volume of space, but does not retain a definite shape, would be a:

liquid

Toothpaste flows out of a tube squeezed at the far end because:

liquids cannot be compressed

A ______ always exists around a conductor in which current is flowing:

magnetic field

A million volts would be one:

megavolt

One thousandth of a millimeter would be an:

micron or micrometer

Which factor regulates the number of electrons available to produce xray photons?

milliamperage

The barium sulfate suspension which patients drink for an upper GI series is chemically best described as:

mixture

electrons flow from a:

negative to a positive pole

Electrons flow from:

negative to positive

Which of the following is about the width of your smallest fingernail?

one centimeter

At the moment a liquid changes state into gas , it changes:

potential energy

Most of the heat energy produced in an xray tube during an exposure is released by:

radiation

The only kind of heat transfer that can take place through vacuum space is:

radiation

If a 50-kilogram body is moved from outer space down to the earth, its mass will:

remain the same

In an electrical circuit , electrons are supplied by:

the conductor (wire)

In an alternating current:

the electrons flow in one direction then change direction during a cycle

Michael faraday discovered that a moving magnet will induce electricity to flow in a nearby wire. This is the principle of:

the generator

What is the main advantage of a parallel circuit?

the independence of the branches

Lenz law causes the rotor shaft of the xray tube to spin when an electrical current is supplied to the stator (coil of wire) surrounding it because:

the north pole of the magnetic field around the rotor is repelled by the north pole of the magnetic field around the stator

Within each shell of an atom , which of the two rules for electron configuration always takes precedence:

the octect rule

In a common circuit , the effect of the electrical current travels at :

the speed of light

A circuit is powered by a battery . the electrons flow:

through both the battery and the rest of the circuit

In "closed systems" such as the universe, laws of conservation demand that:

total energy must be equal before and after an event

Any device that can change one form of energy to another is called:

transducer

If an object is lifted from 10 meters to 20 meters above the ground it will have:

twice as much potential energy

In an AC circuit , the actual electrons:

vibrate back and forth

The unit of electrical potential is the:

volt

Electromotive force is measured in:

volts

The unit of measure for electrical power is the:

watt

Which of the following is not a form of energy:

work

Which of the following is not a form of naturally occurring radiation from radioactive nuclei:

xrays