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

Variable Power Supply

Answer 3

Adjustable voltage
Drawn as a diagonal arrow between two circles

Question 4

Switch

Answer 4

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

Question 5

Filament Lamp

Answer 5

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

Question 6

Fixed Resistor

Answer 6

(Ohmic) Linear
Limits flow of current
-Fixed resistance

Question 7

Variable Resistor

Answer 7

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

Question 8

Thermistor

Answer 8

(Non-Ohmic)
Temp ^, Resistance v

Question 9

LDR

Answer 9

(Non Ohmic)
Light ^, Resistance v

Question 10

Diode

Answer 10

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

Question 11

LED

Answer 11

Diode that emits light when current passes
Used for displays

Question 12

Ammeter

Answer 12

Measures Current
Connected in series

Question 13

Voltmeter

Answer 13

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

Question 14

Investigating how current varies with voltage across a component

Answer 14

Set up circuit with a power source, ammeter (series), voltmeter (parallel) across the component, and a variable resistor (used to vary current in the component)
Record measurements of current and voltage in an I-V graph