In a circuit diagram, what does a resistor look like?
A zig-zag line.
In a circuit diagram, what symbol represents a voltage source?
A long line and a short line parallel to each other.
What is the difference between power and energy?
Power: The rate at which energy is transferred or used. | Energy: The total amount of work done or energy consumed.
Differentiate between using $P=I^2R$ and $P=V^2/R$ to calculate power.
$P=I^2R$: Use when current and resistance are known. | $P=V^2/R$: Use when voltage and resistance are known.
Compare and contrast voltage and current in a circuit.
Voltage: The electric potential difference that drives the current. | Current: The flow of electric charge through the circuit.
What are the differences between the formulas $P=IV$ and $E=Pt$?
$P=IV$: Calculates instantaneous power. | $E=Pt$: Calculates total energy consumed over a period of time.
Differentiate between power dissipated by a resistor and power supplied by a voltage source.
Power dissipated by resistor: Energy converted to heat. | Power supplied by voltage source: Energy provided to the circuit.
What is electrical power?
The rate at which electrical energy is transferred or converted, measured in Watts (W).
Define Watt (W).
The unit of power, representing the rate of energy transfer or conversion.
What is the relationship between power and energy?
Power is the rate at which energy is used or transferred. Energy equals power multiplied by time ($E = Pt$).
Define resistance (R).
A measure of the opposition to current flow in an electrical circuit. Measured in ohms (ฮฉ).
Define current (I).
The rate of flow of electric charge through a conductor. Measured in amperes (A).
