Electronics Basics

Question 1

State the ohm’s law

Answer 1

The voltage v across the resistor is directly proportional to the current I flowing through the resistor

V = iR

Question 2

Conductance

Answer 2

The ability of an element to conduct electricity.

G = 1/R = i/V

Question 3

Parallel Resistors - Equivalent Resistance

Answer 3

Is equal to the product of their resistance divided by their sum. Or

1/R,eq = 1/R1+1/R2+ 1/Rn

Question 4

Superposition

Answer 4

States that the voltage across an element in a linear circuit is the algebraic sum of the voltages across that element due to each independent source acting alone.

Independent voltage source : Short circuit
Independent current source:
Open circuit

Question 5

Source Transformation

Answer 5

The process of replacing a voltage source Vs in series with a resistor R by a current source Is in parallel with a resistor R or vice versa

Vs = Is*R

Question 6

Capacitor

Answer 6

W = 0.5×C×v^2
C = capacitance
W = energy stored

Under DC conditions acts as a open circuit

Question 7

Parallel Capacitors

Answer 7

Ceq = C1+ C2+ Cn

Question 8

Series Capacitors

Answer 8

1/Ceq = 1/C1 + 1/C2 + 1/Cn

Or

Ceq = C1 C2/(C1+C2)

Question 9

Inductor

Answer 9

Under DC conditions acts as an open circuit

W= 0.5×L×i^2
i= current

Question 10

Series Inductors

Answer 10

Leq= L1+ L2 + Ln

Question 12

Parallel Inductors

Answer 12

1/Leq= (1/L1)+ (1/L2)+(1/Ln)

Or

Leq=L1L2/(L1+L2)