2.6 Resistors

Question 1

What is a ‘resistor in series’?

Answer 1

Resistors directly alongside one another.

Question 2

What is a variable resistor?

Answer 2

A resistor used in circuits where the resistance may need to be changed.

Question 3

What is a preset?

Answer 3

Preset is used where the value of the resistor can be set before the circuit is housed in a casing. A type of ‘mini’ variable resistor.

Question 4

What is a LDR?

Answer 4

Light Dependent Resistor. A resistor whose value changes with light levels.

Question 5

What is a thermistor?

Answer 5

A resistor whose value changes with temperature.

Question 6

What are resistors used for?

Answer 6

Resistors are used to control/restrict the flow of current in circuits. As a result, one of their functions is to protect delicate components. The resistance of any material is a measure of its ability to conduct electrical current.

Question 7

What is resistance measured in?

Answer 7

Resistance (R) is measured in Ohms (Ω).

Question 8

What does the fourth band on a resistor represent?

Answer 8

The fourth band is the tolerance band (show how accurate the resistor is)

Question 9

What does the colour of the 1st & 2nd band represent?

Answer 9

The number

Question 10

What does the colour of the band on the 3rd band represent?

Answer 10

The number of 0’s