Module 4.2 Flashcards
What is Diode?
A component that allows current through in one direction only. In the correct direction, diodes have a threshold voltage (typically 0.6V) above which current can flow.
What is Electromotive Force?
The energy supplied by a source from chemical to electrical per unit charge.
What is filament lamp?
A bulb consisting of a metal filament that heats up and glows to produce light. As the filament increases in temperature, its resistance increases.
What is I-V characteristics?
Plots of current against voltage, that shows how different components behave.
What is Kilowatt-Hour?
A unit of electrical energy. It is usually used to measure domestic power consumption.
What is LDR?
A light sensitive semiconductor whose resistance increases when light intensity decreases.
What is Ohm?
The unit of resistance.
What is Ohmic conductor?
A conductor for which the current flow is directly proportional to the potential difference across it when under constant physical conditions.
What is Ohms law?
The current and potential difference through an ohmic conductor held under constant physical conditions are directly proportional, with the constant of proportionality being resistance.
What is Potential difference?
The difference in electrical potential between two points in a circuit. It is also the work done per coulomb to move a charge from the lower potential point to the higher potential point. It is measured in Volts.
What is Power?
The rate of work done in a circuit.
What is Resistance?
A measure of how difficult it is for current to flow through a material.
What is Resistivity?
A measure of how difficult it is for charge to travel through a material.
What is Resistor?
A device that has a fixed resistance and follows ohm’s law.
What is Volt?
The unit of potential difference.
