Electricity and Magnetism

Question 1

What is an electrical circuit?

Answer 1

A closed loop which an electrical current flows through

Question 2

What are the other names for electrical devices(light bulbs)?

Answer 2

Loads/resistors

Question 3

Name some conductors:

Answer 3

Aluminum, copper, steel, iron

Question 4

Current definition

Answer 4

Electrical velocity, speed of flowing electrons

Question 5

Voltage defintion

Answer 5

Electrical force, force needed to push electrons through a circuit

Question 6

Resistance definition

Answer 6

Electrical friction, how much a material opposes electrons moving through it

Question 7

When adding a bulb in a series circuit, why do the two bulbs become dimmer?

Answer 7

The total resistance increased and the current decreased.

Question 8

What happens when the voltage increases in both series and parallel circuits?

Answer 8

The current increases and the bulbs become brighter

Question 9

What happens when adding more bulbs to a parallel circuit?

Answer 9

Whole Circuit:
Resistance decreases
Individual bulbs/pathways:
Current and brightness stays the same

Question 10

True or False: Increasing the length of the wire of an electromagnet will increase it’s strength

Answer 10

False

Question 11

Definition of electromagnetic induction?

Answer 11

Using a magnetic field to generate current in a wire

Question 12

Motor?

Answer 12

Electrical energy —> Mechanical energy, current runs through a wire coiled around an iron core.

Question 13

Example of a motor?

Answer 13

Blenders, fans, cars, washing machines, dishwashers, dryers, motorcycles, etc.

Question 14

Generator?

Answer 14

Mechanical—>electrical energy, wire is copied around permanent magnet

Question 15

Example of generator?

Answer 15

Hydroelectric dam, steam turbines, etc.

Question 16

True or False, both generators and motors uses permanent and electromagnets?

Answer 16

True

Question 17

Diode?

Answer 17

Ensures electrical current flows one direction

Question 18

Transistors?

Answer 18

Amplify electrical signals and turns the electrical current off and on

Question 19

Semiconductors?

Answer 19

Materials that conduct current better than insulators but not as well as conductors

Question 20

Integrated circuits?

Answer 20

(microchips) small electronic device made up of electrical components, (transistors, diodes, etc.)

Question 21

Example of semiconductors?

Answer 21

Silicon

Question 22

Real life examples of series circuits?

Answer 22

String of fairy lights, home alarm system, circuits breaker

Question 23

Real life examples of parallel circuits?

Answer 23

Microwaves, lamps, ovens, fridges, washer, dryer