The document provides an overview of key calculations and concepts in electronics, focusing on series and parallel circuits. It includes definitions of fundamental electrical terms such as voltage, current, resistance, and power, along with Ohm's Law and Watt's Law. Additionally, it presents examples using a 'VIRP' chart to solve for unknown values in circuit calculations.

1. Calculations in
Electronics
don’t wait! calculate!

2. Series Circuits
describe how it acts

3. Parallel Circuits
describe how it acts

4. Series Parallel

5. Don’t Forget the Units!!!
Term Description Unit Symbol
Voltage (V or Electromotive Force Volts V
E)
Current (I) Rate of Electron Flow Amps A
Resistance (R) Opposition to electron flow Ohms Ω
Power (P) Rate of doing electrical work Watts W
Charge (Q) Quantity of accumulated Coulombs C
electrons

6. Ohm’s Law

7. Watt’s Law

8. Series vs. Parallel Behavior
Series Parallel
V1+V2+V3…= VT = in parallel it stays the
same
In series it stays the same IT =I1+I2+I3…
R1+R2+R3…= RT =1/(1/R1 + 1/R2 + 1/R3 …)
P1+P2+P3…= PT =P1+P2+P3…

9. VIRP Chart
V I R P
1
2
3
T

10. Make a VIRP Chart and
solve for unknown values
V I R P
1 1.27 2.7mA 470Ω 3.4mW
2 5.94 2.7mA 2.2kΩ 16mW
3 2.7 2.7mA 1kΩ 7.3mW
T 10V 2.7mA 3760Ω 27mW

11. Make a VIRP Chart and
solve for unknown values
V I R P
1 10V 21.3mA 470Ω 213mW
2 10V 4.55mA 2.2kΩ 45.5mW
3 10V 10mA 1kΩ 100mW
T 10V 35.8mA 279Ω 358mW