CHARGE AND CURRENT

Question 1

Describe the flow of conventional currents.

Answer 1

Positive to negative

Question 2

Describe the flow of electron flow.

Answer 2

Negative to positive

Question 3

Does the direction of current flow matter when shown in circuits?

Answer 3

No, apart from diodes that only allow current in one direction. (line blocks current)

Question 4

What is the actual direction of current flow?

Answer 4

Electron flow

Question 5

What carries charge?

Answer 5

In metals its electrons
In electrolytes its ions

Question 6

How to calculate current?

Answer 6

I = Q/t

Question 7

What is the unit for charge?

Answer 7

coloumbs C

Question 8

What is elecmentary charge?

Answer 8

1.6*10^19

Question 9

Charge is quantisied. What does this mean?

Answer 9

In discrete packets (can only be specific values). Multiplies of e

Question 10

How do you calculate the amount of electrons in 1C?

Answer 10

1C/e = answer

Question 11

Why is ammeter connevted in series but voltmeter is not?

Answer 11

Ammeter has no resistance, voltmeter has infinite resistance so in parallel. (not atually true)

Question 12

Current entering a juntion is equal to current exiting the junction. Name the law.

Answer 12

Kirchoff’s First Law

Question 13

When does CE has random movement in a metal?

Answer 13

No pd

Question 14

What type of movement does CE have when pd is passing thro the metal?

Answer 14

Net movement in one direction, still slightly random hence ‘drift’ velocity.

Question 15

Calculating drift velocity

Answer 15

I=nAev

Question 16

Explain the process of how inaev was made

Answer 16

(check notes)