Chapter 5

Question 1

Describe direct current?

Answer 1

ELECTRONS FLOW ONE WAY AROUND A CIRCUIT(OFTEN SUPPLIED BY A CELL)

Question 2

Describe alternating current

Answer 2

Electron change direction due to the way generators produce electrical energy

Question 3

what is the effective voltage of the mains?

Answer 3

230v

Question 4

what is the frequency of mains?

Answer 4

50hz(hertz)

Question 5

what is the peak voltage of the mains?

Answer 5

325v

Question 6

what is the peak to peak voltage of the mains?

Answer 6

650v

Question 7

how to calculate frequency

Answer 7

frequency = 1/time

use the across squares and multiply by time base then work out frequency

Question 8

power equation(involving energy and time)

Answer 8

power= energy/time

Question 9

power equation (involving potential difference and current)

Answer 9

power= voltage x current

Question 10

power equation (involving resistance and current)

Answer 10

power= resistance x (current)2

Question 11

what is internal energy?

Answer 11

the total energy that its particles have in their kinetic and potential energy stores