Electricity 1

Question 1

What is current

Answer 1

Charge flowing per second

Question 2

What are the 2 types of current

Answer 2

A.C. And D.C.

Question 3

What does D.C stand for

Answer 3

Electrons (charges) flow in 1 direction

Question 4

What does A.C stand for

Answer 4

Charges flow back and forth constantly changing direction

Question 5

As the current changes so does the …

Answer 5

Voltage

Question 6

What is the voltage and frequency mains supply in the uk

Answer 6

V = 230v
f = 50 Hz

Question 7

What is the peak voltage of the main supply

Answer 7

325v

Question 8

What is the other name for the stated value

Answer 8

Root mean square

Question 9

How to calculate peak and rms voltage

Answer 9

Vpeak = /2 x Vrms

Vrms = Vpeak
———-
/2

Question 10

How to calculate peak
And rms current

Answer 10

Ipeak = /2 x Irms

Irms = Vpeak
———
/2

Question 11

Is Vpeak or Vrms always bigger

Answer 11

Vpeak

Question 12

What is the x-axis of the oscilloscope pattern called.

Answer 12

Time base

Question 13

How to calculate the frequency from the period of a wave

Answer 13

Frequency = 1
———-
Period