Unit 1: Topic 4: Equations, Symbols and Units and Definitions Flashcards
1) Alternating current (AC):
Value of the current is constantly changing.
1) Capacitance:
A measure of a capacitor’s ability to store charge. Measured in Farad’s.
1) Current:
Amount of coulombs of charge that pass a point per second (I=Q/t).
1) Direct current (DC):
Current flows in one direction only in a continual loop.
1) Differential mode:
In reference to Op-amps. (Both the inverting and non-inverting inputs are used in this mode).
1) Electric field:
A region where a charged particle experiences a force without being touched.
1) Electromotive force (E.M.F):
The electrical energy given to each coulomb of charge as it passes through the source.
1) Frequency:
The number of waves produced in one second (f=N/t).
1) Internal resistance:
The resistance from within a cell or battery (only considered when a current is flowing).
1) Inverting mode:
Positive input (non-inverting input) voltage is connected to 0V.
1) Lost volts:
Voltage dropped across the internal resistor inside the battery.
1) Peak voltage:
Greater than the r.m.s voltage. Peak value in UK is 325V (max voltage).
1) Period:
Time taken for one wavelength to pass a point.
1) Potential difference:
The difference of electrical potential between 2 points.
1) Resistance:
A measure of the opposition to current.
1) Root mean square voltage (Vrms):
Average value of voltage. The Vrms is equal to d.c voltage (230V in UK).
1) Saturation:
Output voltage can not rise above or fall below the supply voltage. In the situation where Vo reaches it’s limit it is said to be saturated.
1) Terminal potential difference (Vtpd):
The voltage measured across the cell (p.d across it’s terminals).
1) Voltage:
Amount of energy given to each coulomb of charge (V=Ew/Q).
