Electronics/Formulas

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Electronics | Foreword | Basic Electronics | Complex Electronics | Electricity | Machines | History of Electronics | Appendix | edit

Conductor's Properties[edit]

Voltage
V = \frac{W}{Q}
Current
I = \frac{Q}{t}
Energy
E = \frac{W}{t} = \frac{W}{Q} \frac{Q}{t} = V \cdot I
Conductance
Y = \frac{I}{V} = \frac{1}{R}
Resistance
R = \frac{V}{I} = \frac{1}{Y}

Resistance and Temperture[edit]

Resistance of a conductor icrease with increasing temperature

For Conductor
R = Ro + N T
For Semi Conductor
R = R_o e^NT

Ohm's Law[edit]

Resistance
R = \frac{V}{I}
Voltage
V = I \cdot R
Current
I = \frac{V}{R}
Power
P = I \cdot V

Power Delivered[edit]

Electric Power delivered through resistive network is equal to Electric Power Supply minus Electric Power Loss as Heat through resistance of the resistive network

Electric Power Supply
P_v = I V
Electric Power Loss
P_r = I^2 R = \frac{V^2}{R}
Electric Power Delivered
P = P_v - P_r
P = IV - I^2 R = I (V - IR)
P = IV - \frac{V^2}{R} = V (I - \frac{V}{R}

Work Done[edit]

W = P \cdot t
W = F \cdot s
W = F \cdot s \cdot \cos \theta