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General Physics > Magnetism > Flashcards

Magnetism Flashcards

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1
Q

The study of how a material moves if there are a presence of magnetic field and force.

A

Magnetism

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2
Q

Region of magnetic material where magnetism occurs.

A

Magnetic Field

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3
Q

Reason why there’s repulsion and attraction between objects.

A

Magnetic Force

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4
Q

Any material that has the ability to attract metal, producing magnetic field, attracting unlike poles and repelling like poles.

A

Magnet

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5
Q

It is the latin word of Magnet that is derived from “Magnesia”

A

Magnetite

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6
Q

He is a shephered who discovered the natural magnet (Lodestone)

A

Magnes

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7
Q

How many types of magnet are there?

A

Three.

  • Ferromagnetic
  • Paramagnetic
  • Electromagnetic
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8
Q

A substance that is naturally and permanently magnetic like iron.

A

Ferromagnetic

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9
Q

Becomes magnetic under the influence of a magnetic field. It wont magnetize unless there is a strong magnetic force that will act.

A

Paramagnetic

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10
Q

Becomes magnetic under the influence of electric current.

A

Electromagnetic

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11
Q

What are the end of a magnet are called?

A

Poles (free poles)

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12
Q

Like poles ____.

A

Repel

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13
Q

Unlike poles ____.

A

Attract

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14
Q

A magnet has greatest strength at where?

A

Poles. The ends of a magnet.

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15
Q

A magnet has little or no strength at where?

A

In the middle.

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16
Q

What does the forces of attraction and repulsion depend on?

A

The strength of the magnet and the distance between the poles.

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17
Q

It is when natural magnets are brought near magnetic substances such as iron, nickel, cobalt, etc. induces magnetic properties.

A

Magnetic Induction

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18
Q

It is a twisted wire on a paper or wooden cylinder.

A

Solenoid

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19
Q

An instrument used to measure current.

A

Galvanometer

20
Q

In case 1, what is the movement of the magnet when the reading of the voltage of the galvanometer is zero?

A

Stationary (Not moving)

21
Q

In case 2, what did the pointer of the galvanometer deflected to and the movement of the north pole to the solenoid?

A

The galvanometer deflected to the right as the north pole moved towards .

22
Q

In galvanometer, it is a change of direction.

A

Deflect

23
Q

It is a process of increasing electron flow.

A

Induced current

24
Q

If the movement is towards the solenoid, it will deflect towards ___.

A

Right

25
Q

In galvanometer, if the reading is right the current that its carrying is ____.

A

Positive

26
Q

In galvanometer, if the reading is left the current that its carrying is ____.

A

Negative

27
Q

In galvanometer, if the reading is in the middle the current that its carrying is ____.

A

Zero

28
Q

In case 3, what did the pointer of the galvanometer deflected to as the motion of the magnet stops?

A

It showed zero readings.

29
Q

TRUE OR FALSE:

If there is no movement, there is no current.

A

TRUE

30
Q

TRUE OR FALSE:

If there is no current, there will be a reading.

A

FALSE

(No current, no reading)

31
Q

In case 4, what is the movement of the magnet and the direction of current flow as the galvanometer deflects towards the left?

A

The magnet is moved away and the current flows opposite in the solenoid.

32
Q

In case 5, what happens to the deflection if the magnet is moved alternatively with greater velocity?

A

Increases

33
Q

The definition of polarity is ___.

A

The poles

34
Q

In case 6, when the polarity of the magnet is reversed and brought close to solenoid what is the direction of the current flow and the galvanometer?

A

The current flows in an opposite direction and the galvanometer deflects to the left.

35
Q

In case 6, when the polarity of the magnet is reversed and brought far to solenoid what is the direction of the the galvanometer?

A

The galvanometer deflects to the right.

36
Q

If the magnet is at rest, will it deflect?

A

No deflection

37
Q

If the magnet moves towards the coil, it will deflect in ____?

A

In one direction

38
Q

If a magnet is held stationary at same position (near the coil), it will _____?

A

No deflection

39
Q

If the magnet is moved away from the coil, it will deflect in ___?

A

In opposite direction

40
Q

If a magnet is held stationary at same position (away the coil), it will _____?

A

No deflection

41
Q

It is a law that states whenever there is a change in the magnetic flux linked with a coil, an electromotive force (e.m.f) is induced .

A

Faraday’s Law of Induction

42
Q

In Faraday’s Law of Induction, if the magnetic field is changing, what will happen to the voltage?

A

There will be an induced voltage

43
Q

In Faraday’s Law of Induction, if there is higher voltage, the current will also be ___.

A

Higher

44
Q

It is the flow of the electron.

A

Current

45
Q

A force causing the electrons to move.

A

Voltage

46
Q

It is a magnetic field lines that is passing through an object.

A

Magnetic flux

47
Q

What are the factors affecting the magnitude of the e.m.f?

A

Change and time

General Physics (2 decks)

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