Book 1 Chapter 3 - resistive components in circuits

Question 1

What do you use to choose preferred values

Answer 1

E24 resistance series

Question 2

What must you do when choosing preferred resistor values

Answer 2

You must choose the value above the one that you calculated.

Question 3

What can you use to work out the resistance of a resistor

Answer 3

Resistor colour code

Question 4

What do the different bands in the colour code stand for

Answer 4

Band 1 - first value
Band 2 - second value
Band 3 - x 10 to the power of the number
Band 4 - tolerance

Question 5

What is the rule for resistance in series

Answer 5

R1 = R2 + R3

Question 6

What is the potential divider equation

Answer 6

Vout = R2/R1+R2 x Vin

Question 7

What is the rule for resistance in parallel

Answer 7

1/Rt = 1/R1 + 1/R2

Question 8

How does the resistance of an LDR change

Answer 8

The resistance of a LDR decreases as light intensity increases.

Question 9

How does the resistance of a thermistor change

Answer 9

The resistance of a thermistor decreases as temperature increases.