Yr11 Flashcards
What is the unit and symbol for current?
Amps
I
What is the unit and symbol for resistance
Ohms
R
What is the unit and symbol for charge
Coolons
Q
What is the unit and symbol for power
Watts
P
What is the unit and symbol for energy
Joules
E
What is a series circuit and how is the current placed
A single loop circuit
The current is the same everywhere
What is a Parallel circuit and how is the current spread
Multiple looped circuit
It is shared around so between each point
What is the equation for voltage
Current (amps) X resistance Ohms
How to work out voltage in a series circuit
V1+V2+V3
How to work out resistance in a series circuit
R1+R2+R3
How to work out resistanse in a paralel circuit
I1+I2
Does all the voltage the same in a paralel circuit
True
How does the resistance change
When temperature increases the resistance of the thermistor decreases
What is a LDR
Light Dependent resistor
What happens to the resistor when the light intensity increases
The resistance of LDR decreases
What do LDRs do
Detect light levels
Types of Resistors
Filament lamp
Diode
LDRs
What does the voltage do and the current increases in a resister
Increases
What do resistors mainly do
Slow down he current and voltage
What ways can electricity flow
Direct current or alternating current
How does direct current flow
In one direction
How does alternating current flow
The voltage and current change size and direction in a regular way which repeats as time goes on
