Electricity and Electromagnetism - AS91173

Question 1

Electric Field

Answer 1

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

Question 2

Voltage

Answer 2

Potential difference

Question 3

Power

Answer 3

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

Question 4

Right-hand grip rule

Answer 4

Magnetic field = fingers
Current = Thumb

Question 5

Right-hand slap rule

Answer 5

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

Question 6

Induced voltage in a straight conductor

Answer 6

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

Question 7

If charged particles are in an electric field…

Answer 7

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

Question 8

Conventional current flows

Answer 8

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

Question 9

Current in series

Answer 9

Equal in all places

Question 10

Voltage in series

Answer 10

Adds to supply voltage

Question 11

Current in parallel

Answer 11

Splits, but combines just before returning to the supply

Question 12

Voltage in parallel

Answer 12

Equal in all places

Question 13

Magnetic Field travels from

Answer 13

North to South

Question 14

Adding a resistor in parallel

Answer 14

Causes total circuit resistance to decrease

Question 15

Adding resistor in series

Answer 15

Causes total circuit resistance to increase

Question 16

Voltmeters are added in…

Answer 16

…parallel

Question 17

Ammeters are added in…

Answer 17

…series

Question 18

When is voltage induced…

Answer 18

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

Question 19

THE MOTOR EFFECT (I FOUND IT)

Answer 19

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.

Question 20

Electromagnetic Induction

Answer 20

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.