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Matt's Physics 2 > Module 3 > Flashcards

Module 3 Flashcards

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1
Q

The word “electric’ is derived from the Greek word “elektron”, meaning _______.

A

amber

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2
Q

It is discovered when they rubbed amber with wool, the amber could attract other objects.

A

Electric Charge

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3
Q

It is an invisible force in nature consisting of two electrical charges, the proton and electron.

A

Electricity

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4
Q

It is a property of matter that causes it to produce and experience electrical and magnetic effect.

A

Electrical Charge

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5
Q

The unit for electrical charge is:

A

Coulomb (C)

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6
Q

The unit of electrical charge is named after:

A

Charles Augustin De Coulomb

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7
Q

Coulomb found out that each electric point charge exerts a _________ force on the other.

A

mechanical force

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8
Q

The charge of an electron or proton:

A

e = ±1.602 x 10^-19 C

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9
Q

Plastic rods and fur are particularly good for demonstrating ___________, the interactions between electric charges that are at rest.

A

electrostatics

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10
Q

This person suggested to calling the two kinds of charges which are positive and negative charges.

A

Benjamin Franklin

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11
Q

Similar charges ________ each other.

A

repel

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12
Q

Different charges ________ each other.

A

attract

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13
Q

When a material has an excess number of electrons, it has __________ electrical charge.

A

negative electrical charge (more electrons = negative)

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14
Q

When a material has an deficiency number of electrons, it has __________ electrical charge.

A

positive electrical charge (less electrons = positive)

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15
Q

Properties of Charge:

A
  • Quantization of Charge
  • Charge is always associated with mass
  • Conservation of Charge
  • Invariance of Charge
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16
Q

This property of charge states that an electric charge can only have discrete values.

A

Quantization of Charge

17
Q

This property of charge states that a charge cannot exist without mass but particles such as photon or neutrino have no mass and can never have a charge.

A

Charge is always associated with mass

18
Q

The higher the electrons, the _________ an object.

A

heavier (more electrons = heavier)

19
Q

The lower the electrons, the _________ an object.

A

lighter (less electrons = lighter)

20
Q

Particles that have no mass, can never have a ________.

A

charge (no mass = no charge)

21
Q

This property of charge states that an electric charge is always conserved in an isolated system.

A

Conservation of Charge

22
Q

This property of charge states that the numerical value of a charge is independent of the frame of reference. The value of a charge is the same whether stationary, or moving.

A

Invariance of Charge

23
Q

It is charging that involves contact.

A

Conduction

24
Q

These are materials that permit electric charge to move easily from one region to the other.

A

Conductors

25
Q

These are materials that do not easily permit the electric charge to flow.

A

Insulators

26
Q

These are materials that has an intermediate property of both conductor and insulator.

A

Semiconductors

27
Q

It is a charging process that does not involve contact.

A

Induction

28
Q

When objects are rubbed together and charges transfer.

A

Friction

29
Q

The phenomenon when an electrified object picks up uncharged bits.

A

Induced-Charged Effect

30
Q

The charges within the molecules of an insulating material can shift slightly; atomic level of separation of charges in insulators.

A

Polarization

31
Q

This law states that the magnitude of the electric force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

A

Coulomb’s Law

32
Q

What is the Coulomb’s Law formula?

A

F = k(|q1q2|)/r^2

33
Q

This principle states that the net electric force on a charge is the sum of force due to other charges.

A

Superposition Principle

Matt's Physics 2 (10 decks)

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