RADPRO HUHU

Question 1

is the science of stationary electric charges

Answer 1

Electrostatics

Question 2

–is the science of electric charges in motion.

Answer 2

Electrodynamics

Question 3

is a means of transferring electric potential energy from one position to another.

Answer 3

Electromagnetic induction

Question 4

describes how electrons are given electric potential energy (voltage) and how electrons in motion create magnetism.

Answer 4

Electromagnetism

Question 5

Electric energy is supplied to the x-ray imaging system in the form of well-controlled

Answer 5

electric current.

Question 6

Electric charge comes in discrete units that

Answer 6

positive or negative

Question 6

the smallest units of electric charge.

Answer 6

PROTON AND ELECTRON

Question 7

1c is equal to hoy many columb

Answer 7

6.3 𝑥 1018 electron charges

Question 7

Removal of these electrons electrifies the substances from which they were removed and results in

Answer 7

static electricity.

Question 7

An object is said to be ____ if it has too few or too many electrons.

Answer 7

electrified

Question 8

what law states that Like charges of electricity repel each other, whereas unlike charges attract each other.

Answer 8

1st

Question 9

what law states The force exerted between two point charges is directly proportional to the product of their strengths

Answer 9

2

Question 10

what law states The force exerted between two point charges is inversely proportional to the square of the distance between them.

Answer 10

3

Question 11

what law states The force exerted between two point charges is inversely proportional to the absolute permittivity of the surrounding medium.

Answer 11

4

Question 11

the direction of the energy field of a positive charge

Answer 11

outward

Question 12

the direction of the energy field of a negative charge

Answer 12

inward

Question 13

the force of attraction between unlike charges or repulsion between like charges is attributable to the electric field.

Answer 13

Electrostatic force

Question 14

the electrostatic force is directly proportional to the product of the electrostatic charges and inversely proportional to the square of the distance between them.

Answer 14

Coulomb’s law

Question 15

Coulomb’s constant: 𝑘

Answer 15

8.99 𝑥 109 𝑁 𝑚2/𝐶2

Question 16

Electric potential is sometimes called

Answer 16

voltage

Question 17

higher the voltage, the greater is the potential to do work.

Answer 17

NOTE

Question 18

the electric potential in homes and offices IN PH

Answer 18

220 V

Question 19

If an electric potential is applied to objects such as copper wire, then electrons move along the wire.

Answer 19

electric current, or electricity

Question 20

any substance through which electrons flow easily.

Answer 20

Conductor

Question 21

any material that does not allow electron flow

Answer 21

Insulator

Question 22

material that under some conditions behaves as an insulator and in other conditions behaves as a conductor

Answer 22

Semiconductor

Question 23

EXAMPLE OF SEMICONDUCTOR

Answer 23

SILICON AND GERMANIUM

Question 24

is the property of some materials to exhibit no resistance below a critical temperature (Tc).

Answer 24

SUPERCONDUCTIVITY

Question 25

EXAMPLE OF SUPERCONDUCTIVITY

Answer 25

TITANIUM AND NIOBIUM

Question 26

When this resistance is controlled and the conductor is made into a closed path, the result is an

Answer 26

ELECTRIC CIRCUIT

Question 27

IN ELECTRICT CIRCUIT WHAT IS THE ROLE OF THE DIAMITER OF WIRE

Answer 27

the diameter determine the increase of electric current

Question 27

electric resistance is measured in

Answer 27

ohms

Question 28

Electric current is measured in

Answer 28

A ampere

Question 29

One ampere is equal to an electric charge of

Answer 29

1c

Question 30

The manner in which electric currents behave in an electric circuit is described by a relationship known

Answer 30

ohm's law

Question 31

“The voltage across the total circuit or any portion of the circuit is equal to the current times the resistance.”

Answer 31

ohm's law

Question 32

increase or decrease voltage

Answer 32

transformer

Question 33

allow electron to flow in one diection

Answer 33

diode

Question 34

all circuit elements are connected in a line along the same conductor.

Answer 34

Series circuit

Question 35

contains elements that are connected at their ends rather than lying in a line along a conductor

Answer 35

Parallel circuit

Question 36

Rules for Series Circuits resisttance

Answer 36

The total resistance is equal to the sum of the individual resistances

Question 37

Rules for Series Circuits current

Answer 37

The current through each circuit element is the same and is equal to the total circuit current.

Question 38

Rules for Series Circuits voltage

Answer 38

The sum of the voltages across each circuit element is equal to the total circuit voltage.

Question 39

Rules for Parallel Circuits current

Answer 39

The sum of the currents through each circuit element is equal to the total circuit current.

Question 40

Rules for Parallel Circuits resistance

Answer 40

The total resistance is the inverse of the sum of the reciprocals of each individual resistance.

Question 40

Rules for Parallel Circuits voltage

Answer 40

The voltage across each circuit element is the same and is equal to the total circuit voltage.

Question 41

Electrons flow first in a positive direction and then in a negative direction.

Answer 41

The waveform for AC

Question 42

Electric power is measured in

Answer 42

watts

Question 43

Light bulbs require W of electric power

Answer 43

30 to 150