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Electricity and Magnetism > Module 1 > Flashcards

Module 1 Flashcards

1
Q

The time where Greeks were aware that amber when rubbed vigorously with a piece of cloth could attract nearby objects.

A

600 B.C.

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2
Q

He named substances that attracts as electrics which comes from the Greek word electron meaning “amber”.

A

William Gilbert

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3
Q

It is called the electricity at rest. It refers to the electric charges that build up on the surface of materials and substances.

A

Static Electricity

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4
Q

It is the phenomenon associated with stationary or moving electric charges.

A

Electricity

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5
Q

A Greek who found that when amber was rubbed with silk it attracted feathers and other light objects. He had discovered static electricity.

A

Thales 600 B.C.

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6
Q

It is also known as electricity due to the movement or flowing of electrons

A

Current electricity

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7
Q

A scientist and physician to Queen Elizabeth I, invented the term electricity (from the Greek word for amber, elecktra). He was the first person to describe the earth’s magnetic field and to realize that there is a relationship between electricity and magnetism.

A

William Gilbert 1600

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8
Q

He invented neon light.

A

Francis Hauksbee

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9
Q

He proved that lightning is a form of electricity

A

Benjamin Franklin

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10
Q

A machine that is used to produce static electricity easily and reliably.

A

Wimshurst machine

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11
Q

It is the area of physics that deals with objects that have an electric charge.

A

Electrostatics

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12
Q

It is a property of matter that is responsible for all electric and magnetic forces and interactions.

A

Electric charge

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13
Q

It is a build-up of stationary electric charge on a substance, electricity at rest.

A

Static Electricity

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14
Q

According to Bohr – Rutherford model of the atom, matter is composed of sub – microscopic particles called?

A

Atoms

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15
Q

According to Bohr – Rutherford model of the atom, electric charges are carried by particles within the atom that are called?

A

Protons and electrons

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16
Q

According to Bohr - Rutherford model, protons are found in a small central region of the atom called the

A

Nucleus

17
Q

_____ a fundamental constant that is the smallest known quantity of electricity and that has a value (either positive or negative) of 1.602176634 ×10-19 coulombs.

A

elementary charge, 1.6 x 10^-19 C

18
Q

They are small, very light particles
(each with only slightly more than 1/2000 the mass of a proton), yet each of them
carries a negative electric charge equal in magnitude to that of the proton.

A

Electrons

19
Q

Atoms are normally electrically _____, because the number of (positive) protons in
the nucleus is equal to the number of (negative) electrons in the space around the
nucleus.

A

Neutral

20
Q

They are small, heavy particles (each slightly heavier than a proton) found in
the nucleus. They carry no electrical charge.

A

Neutrons

21
Q

If an atom gains an extra electron, it is no longer neutral but has an excess of electrons and what net charge?

A

Negative charge

22
Q

If an atom losses an electron, it will have a deficient electrons and what net charge?

A

Positive charge

23
Q

mass of electron is =

A

9.11 x 10^-31 kg

24
Q

1 C =

A

6.24 x 10^18 -e

25
Q

Charge of -e =

A

1.6 x 10^-19 C

26
Q

1 nanocoulomb = what coulomb?

A

1 x 10^-9 Coulomb

27
Q

He is best known as the eponymous discoverer of what is now called Coulomb’s law.

A

Charles - Augustin de Coulomb

28
Q

If the charge on either one of the object is doubled, what happens to the force?

A

Force is doubled.

29
Q

If the charge on both of the object is doubled, what happens to the force?

A

The force increases four times the original value.

30
Q

If the distance was doubled, what happens to the force?

A

The force decreases to 1/4 of its original value.

31
Q

2 factors affecting force

A

Magnitude and distance

32
Q

Coulomb’s law formula

A

F = kq1q2/r2

33
Q

Decreasing the separation distance increases what?

A

Force

34
Q

The magnitude of the force and the distance between the two balloons is said to be?

A

Inversely related.

35
Q

The symbol k is a proportionality constant known as the Coulomb’s law constant. The value is approximately?

A

9 x 10^9 N.m2/C2

36
Q

The distance d in the equation is the distance between the centers of charge for both objects (not the distance between their nearest surfaces).

True or false?

A

True

Electricity and Magnetism (2 decks)

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