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Physics - Level 2 > Electricity and Electromagnetism - AS91173 > Flashcards

Electricity and Electromagnetism - AS91173 Flashcards

1
Q

Electric Field

A

A region where a charged object experiences a force. ALWAYS run positive to negative

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2
Q

Voltage

A

Potential difference

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3
Q

Power

A

Rate at which electrical energy is converted into another form of energy

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4
Q

Right-hand grip rule

A

Magnetic field = fingers
Current = Thumb

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5
Q

Right-hand slap rule

A

Field direction = fingers
Direction of force = ‘slap’
Current = Thumb

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6
Q

Induced voltage in a straight conductor

A

Voltage can be induced across the ends of a straight end conductor by moving the conductor through a magnetic field (and at right angles to the field)
THE DIRECTION OF CURRENT IS THE LEFT HAND SLAP RULE

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7
Q

If charged particles are in an electric field…

A

Positive particles move towards the negative plate
Negative particles move towards the positive plate
(E=Eqd)
In an arc

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8
Q

Conventional current flows

A

From positive to negative though this is NOT the flow of the electrons

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9
Q

Current in series

A

Equal in all places

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10
Q

Voltage in series

A

Adds to supply voltage

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11
Q

Current in parallel

A

Splits, but combines just before returning to the supply

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12
Q

Voltage in parallel

A

Equal in all places

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13
Q

Magnetic Field travels from

A

North to South

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14
Q

Adding a resistor in parallel

A

Causes total circuit resistance to decrease

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15
Q

Adding resistor in series

A

Causes total circuit resistance to increase

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16
Q

Voltmeters are added in…

A

…parallel

17
Q

Ammeters are added in…

A

…series

18
Q

When is voltage induced…

A

…a static conductor is situated within in a changing magnetic field or a conductor moves within a static magnetic field

19
Q

THE MOTOR EFFECT (I FOUND IT)

A

A wire carrying a current creates a magnetic field. This can interact with another magnetic field, causing a force that pushes the wire at right angles. Results in movement of wire. Occurs as long as the current is at right angles to the magnetic field.

20
Q

Electromagnetic Induction

A

Movement of a wire (or a magnet) creates an electric current. The size of the induced voltage will increase if: the strength of the magnet is increased. Wire must be inside the field.a changing magnetic field induces an electric field, which results in the induced voltage.

Physics - Level 2 (3 decks)

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