Electricity - Paper 1 Flashcards
To revise the key points from the Electricity topic (paper 1)
Draw the circuit symbol for a lamp
an X in a circle
Draw the circuit symbol for a diode
An arrow head in a circle
Draw the circuit symbol for a resistor
A rectangular box
Draw the circuit symbol for a variable resistor
A rectangular box with a diagonal arrow
Draw the circuit symbol for an LED
Same as a diode with 2 arrows points away
Draw the circuit symbol for a fuse
A rectangular box with a horizontal one running through it
Draw the circuit symbol for a voltmeter
V in a circle
Draw the circuit symbol for an ammeter
A in a circle
Draw the circuit symbol for a thermistor
a rectangular box with a diagonal line through it
Draw the circuit symbol for an LDR
A rectangular box in a circular with 2 arrows pointing towards it
Define Current
Flow of charge (electrons) measured in amps (A)
State the equation that links charge, current and time.
Charge (C)= Current (A) x time (s)
Q = It
What are the units of charge
Coulombs (C)
What is the relationship between current and resistance?
They have an inverse relationship. As resistance increases, current decreases and vice versa
State the equation that links potential difference, current and resistance
Potential difference (V) = Current (A) x resistance (ohms)
V = IR