Physics Homework [Electricity 1] Flashcards
21/04/25 (20 cards)
State the function of a variable resistor
To provide a resistance that can be manually altered.
What does LED stand for?
Light-emitting Diode
What does LDR stand for?
Light-dependent resistor.
State the function of a fuse.
To stop current flowing if it gets too large.
State the function of a resistor.
To limit the flow of charge.
State the function of a thermistor.
To alter its resistance in response to the temperature of the room.
State the function of an LED
To light up or transfer energy by radiation whilst only allowing current to flow in one direction.
Name the components labelled A to E
Open switch, Closed switch, Cell, Battery, Diode
State the function of a cell or battery
To supply energy to a circuit.
Define closed circuit.
A circuit where all wires are correctly connected and all switches are closed to create complete loops for current to flow through.
Explain which of these diagrams show an ammeter connected correctly to measure the current through the bulb.
A, due to series circuit with bulb.
State the function of an ammeter.
To measure electrical current.
State the function of a diode.
To allow current to flow in one direction only.
Explain which of these diagrams shows a voltmeter connected correctly to measure the potential difference across the bulb.
B due to parallel with bulb.
State the function of a voltmeter
To measure potential difference.
State the difference between a cell and a battery.
A battery is made up of multiple cells.
Name the components labelled K to N
Voltmeter, Ammeter, Thermistor, LDR
State the function of a LDR
To alter its resistance in response to the light intensity in the room.
State the function of a switch.
To turn a circuit on and off (by allowing or not allowing current to flow)
