Topic 4.3 - Electric Circuits Flashcards
Draw the circuit symbol for a switch
Draw the circuit symbol for a cell
Draw the circuit symbol for a battery
Draw the circuit symbol for a lamp
Draw the circuit symbol for a fuse
Draw the circuit symbol for a voltmeter
Draw the circuit symbol for an ammeter
Draw the circuit symbol for a diode
Draw the circuit symbol for a resistor
Draw the circuit symbol for a thermistor
Draw the circuit symbol for a variable resistor
Describe the current across a series circuit
The current is the same across all points in a series circuit.
Describe potential difference in a series circuit
Potential difference is split between components, according to the ratio of their resistances.
Describe current across a parallel circuit
The current is divided between the branches of the circuit.
Describe the potential difference across a parallel circuit
Each branch has a potential difference equal to the potential difference of the supply
What is total resistance in a series circuit?
The sum of the resistances from each component.
Why is it advantageous to connect lamps in parallel?
If one lamp blows, the rest will be unaffected and can still receive current (i.e. the circuit is still complete).
How do multiple power sources affect emf?
In series, the emfs of individual sources are added to give the total emf.
Emfs in parallel do not add.
What is a thermistor?
A resistor in which resistance decreases as temperature increases.
What is an LDR
A resistor in which resistance decreases as light intensity increases.
What is a diode?
A component which only allows current to flow in one direction
