4.3 Component characterisitics

Question 1

Is a filament lap a non ohmic or ohmic conductor

Answer 1

non-ohmic

Question 2

Does resistance increase or decrease as current increases (in a non-ohmic conductor)?

Answer 2

It increases

Question 3

Why does filament burn out?

Answer 3

When current is too big, it burns the filament out

Question 4

Is a diode an ohmic or non-ohmic conductor

Answer 4

non-ohmic

Question 5

Is the resistor a ohmic or non ohmic conductor

Answer 5

ohmic conductor

Question 6

When its temperature increases, does a thermistor’s resistance increase or decrease?

Answer 6

Decrease

Question 7

When light intensity increases, does an LED’s resistance increase or decrease?

Answer 7

Decrease

Question 8

Explain why the resistance of a filament wire increases with potential difference

Answer 8

• As the electrons move through the filament wire they collide with the ions
• the ions vibrate more as the wire gets hotter
• the increasing collisions make it harder for the electrons to move through the wire e