Aother Flashcards
(19 cards)
Why would we need to add extra resistance
For example if your want to make a lamp dimmer
Less electricity energy is transferred to the lamp
What dose this show
That the resistance is contant
What do we call this resistor
An ohmic conductor
The resistance will only stay constant if the ___ is constant
Temperature
What is a filament lamp.
a type of light bulb that produces light by heating a thin wire
Filament means a very fine
Wire
A filament lamp
The wire is tiely tired together
The tin wire gets really hot when an electrical current passs through it it courses it to glow and bring out light
Filament lamp graph
It’s not directly proportional 
Why is a filament lamp not directly proportional
This is because the filament gets hot which causes the resistance to increase
The high temperature the atoms in the filament vibrate more the electrons in the current not collide more with the atoms more energy is need to push the current though ghe filament as pd increases the current dosent as much
Is a filament lamp an omh mic conditioner
No
Which symbol is this
Voltmeter
Which symbol is this
Diode
Which symbol is this
Ammeter
Which symbol is this
Resistor
The current though the diode can only flow in_____
One direction
The diode is a very high resistance in the
Reverse direction
In this circuit the cell is flipped and the current is flowing in the opposite direction will the diode all the current to pass through
No the diode will not allow it due to it having a very high resistance in the reverse
Graph for diode
In reverse direction it don’t not all any current to pass through
