Question 1
Multiple Choice
Electric Current
Question 2
Multiple Choice
Electromotive Force (emf)
Question 3
Multiple Choice
Electric Resistance
Question 4
Multiple Choice
Thermistor
Question 5
Multiple Choice
Light-Dependent Resistor (LDR)
Question 6
Multiple Choice
Resistivity (\rho)
Question 7
Multiple Choice
Resistance of a Wire
Question 8
Multiple Choice
Conventional Current
Question 9
Multiple Choice
Electron Flow
Question 10
Multiple Choice
Direct Current (DC)
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Electric Current
The rate at which charges move past a particular point in a circuit.

Electromotive Force (emf)
The simultaneous transfer of repulsive force between charges throughout a circuit.

Electric Resistance
A measure of how difficult it is for current to flow through a material.

Thermistor
A resistor where resistance decreases as temperature increases.

Light-Dependent Resistor (LDR)
A resistor where resistance decreases as light brightness increases.

Resistivity (\rho)
A material's structural resistance to electron flow.

Resistance of a Wire
It is directly proportional to length and inversely proportional to cross-sectional area.

Conventional Current
Flows from the positive terminal to the negative terminal.

Electron Flow
Moves from the negative terminal to the positive terminal.

Direct Current (DC)
Current that flows in only one constant direction.

Ohm's Law
Resistance is the constant ratio of potential difference to current, provided temperature is constant.

Ohmic Behavior
A linear relationship where voltage and current are directly proportional.

Electric Power (P)
The rate at which energy is delivered or consumed by a circuit element.

Kilowatt-hour (kWh)
A unit of energy equal to .

Voltmeter
Connected in parallel and has infinite resistance.

Ammeter
Connected in series and has zero resistance.

Series Circuit Current
The current is the same through all components.

Series Circuit Voltage
The sum of the individual voltage drops equals the source voltage.

Parallel Circuit Voltage
The potential difference is the same across each branch.

Parallel Circuit Resistance
The total resistance is always smaller than the smallest individual resistor.

Kirchhoff's Current Law (Parallel)
The total current entering a junction equals the sum of the currents in the branches.

Potential Divider
A series circuit that allows the input voltage to be split between two resistors.

Primary Cell
A chemical cell that cannot be recharged.

Secondary Cell
A cell that can be recharged by forcing charges back to their original position.

Internal Resistance (r)
Resistance within a cell that causes the terminal voltage to drop when current flows.

Solar Cell Efficiency
Approximately

Ideal Ammeter
Has zero resistance to avoid affecting the circuit's current.

Ideal Voltmeter
Has infinite resistance to minimize current draw from the circuit.

Drift Velocity
The average velocity attained by charged particles in a material due to an electric field.

Combination Circuit
A circuit containing both series and parallel pathways.

Energy Transformation in a Cell
Chemical energy to electrical energy.

Anode in a Battery
The negative metal electrode where electrons flow from.

Terminal Voltage ()
The actual voltage delivered to the external circuit ().

Resistor Color Code Purpose
To indicate the resistance value and tolerance of a fixed resistor.
