lecture one Flashcards
wavelength=?
c/f
v=?
dw/dq volts = the amount of work done per unit charge.
I=?
I=dq/dt= the amount of charge passing by per unit time.
p=?
p=dw/dt=the rate of expanding or gaining energy.
what are active elements? give examples.
active elements are elements that are capable of generating energy, ex. batteries.
what are passive elements? give examples.
they cannot generate energy, ex. inductors, capacitors and resistors.
independent source?
a source witch does not rely on any other voltage or current to produce a voltage or current.
dependent source?
relies on a voltage or current in the circuit to produce a voltage or current.
define resistance?
it’s the ability of materials to hold back current or specifically electric charge.
properties of conductance?
i=Gv it’s the reciprocal of resistance, measured in siemens or mho.
equations of power?
p=i^2*R=v^2/R=iv.
what is a node?
a point where two or more circuit elements meet.
what are properties of resistors connected in series?
they carry the same current and their Req = their sum.
what are properties of resistors connected in parallel?
they carry the same voltage and 1/Req = 1/R1 +…1/Rk.
voltage divider=?
V1=Vt*R1/R1+R2.
