Eletrical circuit Symbols

Question 1

What does a Fixed Resistor Do?

Answer 1

Limits the flow of the electrical current

Question 2

What is a Thermistor

Answer 2

Resistance depends on its temp.
Low Temp = High Resistance
High = Low Resistance
(Be used to activate fire alarms)

Question 3

LDR (Light Dependent Resistor)

Answer 3

Resistance depends on light intensity
-Low temp = high resistance
-Higher temp = Lower resistance
(LDR can be used as sensor in cameras)

Question 4

Semiconductor Diode

Answer 4

Allows current to only flow in only one direction.
Used to convert an alternating current into direct current