Electric Energy (charge)

Question 1

What way is current flow in a circuit?

Answer 1

+ to -

Question 2

What direction is the conventional current (flow of electrons)?

Answer 2

• to +

Question 3

What is an insulator

Answer 3

A material that doesn’t conduct charge (no current can flow)

Question 4

Examples of insulator materials

Answer 4

Rubber and plastic and wood

Question 5

What’s a conductor

Answer 5

A material that can conduct charge easily so current flows (copper, steel)

Question 6

Define current

Answer 6

Flow of electric charge

Question 7

Current equation with charge

Answer 7

I = Q/t

Question 8

What’s charges unit?

Answer 8

C (coulombs)

Question 9

What is resistance?

Answer 9

Anything in a circuit that slows the flow of charge down

Question 10

What is resistance measured in?

Answer 10

Ohms

Question 11

Resistance equation

Answer 11

R = V/I

Question 12

How to increase resistance in wires

Answer 12

Increase length of wire or decrease cross section of wire or decrease current

Question 13

What’s an LDR?

Answer 13

A part in circuit that detects light and then causes resistance to increase in the circuit

Question 14

What is a thermistor?

Answer 14

A component that detects temperature and then increases resistance in the circuit.

Question 15

Electrical power equation

Answer 15

P = IV

Question 16

Energy transferred equation

Answer 16

E = IVt

Question 17

Electric field diagrams charge direction of arrows

Answer 17

q- <—

Question 18

Electric field diagrams charge direction of arrows positive

Answer 18

q+ —>

Question 19

Work equation

Answer 19

W = Fd

Question 20

What is work done in a circuit?

Answer 20

Energy transferred per unit Time

Question 21

Gravitational potential energy equation

Answer 21

Ep = mgh

Question 22

Kinetic energy equation

Answer 22

Ek = 1/2 mv2

Question 23

Efficiency equation

Answer 23

Useful output / total input

Question 24

Increase of light effect on LDR

Answer 24

decrease resistance