Electronics/Formulas

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Conductor's Properties

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

Resistance of a conductor icrease with increasing temperature

For Conductor

R = R_o + N T

For Semi Conductor

R = R_oe^NT

Ohm's Law

Resistance

$R = \frac{V}{I}$

Voltage

$V = I \cdot R$

Current

$I = \frac{V}{R}$

Power

$P = I \cdot V$

Power Delivered

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 = IV

Electric Power Loss

$P_r = I^2 R = \frac{V^2}{R}$

Electric Power Delivered

P = P_v − P_r

P = IV − I²R = I(V − IR)

$P = IV - \frac{V^2}{R} = V (I - \frac{V}{R}$

Work Done

$W = P \cdot t$

$W = F \cdot s$

$W = F \cdot s \cdot \cos \theta$