Elec. Circuits: Circuit Components

Question 1

Cell

Answer 1

Provides circuit with a source of potential difference (energy)

Question 2

Battery

Answer 2

2 or more cells

Question 3

Switch

Answer 3

Turns circuit on(closed), or off(open)

Question 4

Filament Lamp

Answer 4

Emits Light(Non Ohmic)
-As I^ , R^
Temperature of filament ^, metal ions scatter electrons more,
resistance increases

Question 5

Fixed Resistor

Answer 5

(Ohmic)
Limits flow of current
-Fixed resistance

Question 6

Variable Resistor

Answer 6

Resistor with a slider
-Changes resistance
(E.g. Volume controls)

Question 7

Thermistor

Answer 7

(Non-Ohmic)
Temp ^, Resistance v

Question 8

LDR

Answer 8

(Non Ohmic)
Light ^, Resistance v

Question 9

Diode

Answer 9

Allows current to flow in only one direction
After a small forward voltage resistance drops quickly
-Reverse Direction resistance is very high

Question 10

LED

Answer 10

Diode that emits light when current passes
Used for displays

Question 11

Ammeter

Answer 11

Measures Current
Connected in series

Question 12

Voltmeter

Answer 12

Measures potential diff. of a component
Connected in parallel with the component