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Rad Spring Final > Physics Unit 2 > Flashcards

Physics Unit 2 Flashcards

1
Q

The process where electrons are removed or added to a body of matter, is called

A

Electrification

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2
Q

The electrostatic force between two charges is____ proportional to the square of the distance between them

A

Indirectly

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3
Q

What device can detect the presence of an electrical charge?

A

Electroscope

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4
Q

Electrostatics is the branch of physics dealing with charges____

A

At rest

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5
Q

A____ charged object has an excess of electrons

A

Negatively

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6
Q

The removal of electrons from one object, by rubbing it with another of a different kind is called electrification by____

A

Friction

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7
Q

When a charged body touches an uncharged body, the uncharged body acquired the same charge, and is called electrification by____

A

Contact

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8
Q

Electrical charges

A

On the external surface of a conductor

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9
Q

The greatest concentration of charges will

A

Reside on the sharpest, external curvature of a conductor

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10
Q

If you increase the charges of two negatively charged objects, the electrostatic force between them____

A

Increases

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11
Q

The process of electrification, when electrical field act upon one another, without touching is known as

A

Induction

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12
Q

T/F electrification by induction is the simplest method of electrification

A

False

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13
Q

T/F in order for electrons to flow. There must be equal charges at both ends of the pathway.

A

False

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14
Q

T/F super conductors, have the ability to conduct or insulate electron flow

A

False

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15
Q

T/F Electrons in an electrical current always move in the same direction

A

False

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16
Q

T/F electrostatics is also called static electricity

A

True

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17
Q

T/F titanium is an example of a non-conductor

A

False

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18
Q

T/F if an object has a deficiency of electrons it has a positive charge

A

True

19
Q

T/F the longer the conductor, the less resistance it has to electric current

A

False

20
Q

T/F the unit of resistance is Ohms

A

True

21
Q

T/F if you increase the temperature of a conductor, you decrease resistance

A

False

22
Q

T/F if a circuit is open, current will not flow

A

True

23
Q

Which method of electrification is of most important to the radiographer

A

Induction

24
Q

In solid conductors,_____ charges are stationary

A

Positive

25
Q

Which of the following statements is true regarding electrolysis

A

Electrolysis is the electron movement through an ionic solution

26
Q

The device that converts chemical energy to electrical energy is known as a

A

Battery

27
Q

The device that converts mechanical energy to electrical energy is known as a

A

Generator

28
Q

______ is termed as the quantity of electrons flowing

A

Current

29
Q

_____ is termed for the number of electrons in excess, at one end of the circuit and a deficiency at the other

A

Potential difference

30
Q

_____ is termed for the strength or force of electron flow

A

Potential difference

31
Q

_____ is termed for the opposition to current flow in a circuit

A

Resistance

32
Q

Potential difference

A

Volt

33
Q

Current

A

Ampere

34
Q

Resistance

A

Ohms

35
Q

Power

A

Watt

36
Q

As the cross-sectional diameter of a conductor increases resistance will

A

Decrease

37
Q

In a conductor as temperature increases, resistance_____

A

Increases

38
Q

Series

A

Has one complete pathway for current flow, current is the same for each component, current stops with any break

39
Q

Parallel

A

Current for each resistor may differ, adding resistors, reduce resistance, break in one branch, has no effect on others

40
Q

Circuit breakers are sometimes used to decrease the occurrence of a short circuit because of an increase in____

A

Amperage

41
Q

Which end of the pole is the source of electrons?

A

Negative pole

42
Q

What term is used to describe the maximum potential difference between positive and negative ends of a source

A

EMF

43
Q

T/F Creating a pathway for electrons to move between a charge body in the Earth is called grounding

A

True

Rad Spring Final (9 decks)

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