EC- charge and current

Question 1

what is current

Answer 1

the rate of flow of charge

Question 2

what is the symbol for current

Answer 2

capital i

Question 3

what is the symbol for charge

Answer 3

capital Q

Question 4

what direction does the current flow

Answer 4

from the positive terminal to the negative terminal of a cell or battery

Question 5

how do you work out the current in a series circuit

Answer 5

all components have the full amount of current therefore they all have the same value

Question 6

how do you work out the total current in a parallel circuit

Answer 6

the sum of the current in all the branches

Question 7

what is the rate of flow of charge if the current is 1 amp

Answer 7

1 columb per second

Question 8

why can’t insulators carry a charge from place to place

Answer 8

there are no free electrons ( they are all bound tightly to the nuclei) therefore the electrons can’t flow through the circuit carrying a charge

Question 9

what do semi conductors contain

Answer 9

some free electrons but it is only a limited number

Question 10

how do you change the number of free charge carriers in a semiconductor

Answer 10

by altering the temp or changing its exposure to light