C9 - Electrical Current

Question 1

what direction is conventional current

Answer 1

from positive to negative

Question 2

what are conduction/free electrons

Answer 2

these are negatively charged electrons that are free to move about, they allow the metal to conduct an electrical current

Question 3

how do conduction electrons form

Answer 3

usually one electron from each atom breaks away and this then becomes a conduction electron

Question 4

in what direction do conduction electrons travel when an electrical force is applied to it

Answer 4

because they are negative they go away from negative terminal of cell and towards the positive terminal. the opposite of current

Question 5

what makes there be a current in a circuit

Answer 5

when charged particles flow past a point we say that there is a current

Question 6

what is current measured in

Answer 6

amperes

Question 7

what is charge measured in

Answer 7

couloumbs C

Question 8

what is equation for charge

Answer 8

charge = current x time

Question 9

what is the elementary e charge of each electron

Answer 9

1.6 x 10-19

Question 10

what is kirchoffs first law

Answer 10

the sum of current entering a point in a circuit is the same as that leaving the point

Question 11

what is NAVE

Answer 11

n = number density
a = cross sectional area
v = mean drift velocity
e = elementry charge
I = nAve