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Electrical Engineering formulas

130 results. Open any card and leave one value empty to calculate it.

Electrical Engineering

Differentially compounded DC generator current

Electrical Engineering

\[I_a = I_f + I_L\]
GATE
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Differentially compounded DC generator voltage

Electrical Engineering

\[V_t = E_a - I_a \cdot ( R_a + R_s )\]
GATE
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Distribution factor

Electrical Engineering

\[Distribution_{factor} \cdot K_{d} = \frac{phasor_{sum\_coil\_emf}}{arthematic_{sum\_of\_coil\_emf}}\]
GATE
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Distribution factor or spread factor or belt factor

Electrical Engineering

\[K_{d} = \frac{The_{emf\_induced\_when\_the\_winding\_is\_distributed}}{The_{emf\_induced\_when\_the\_winding\_is\_concentrated}}\]
GATE
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Diversity factor

Electrical Engineering

\[Diversity_{factor} = \frac{Sum_{of\_individual\_max\_demands}}{Maximum_{demand\_on\_power\_station}}\]
GATE
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Eddy current loss

Electrical Engineering

\[W_e = K \cdot B_m \cdot a \cdot x ^ ( 2 ) \cdot f ^ ( 2 ) \cdot t ^ ( 2 )\]
GATE
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Eddy current loss in motor

Electrical Engineering

\[P_e = K_e \cdot f ^ ( 2 ) \cdot B_m ^ ( 2 )\]
GATE
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Effective reactance by the alternator

Electrical Engineering

\[X_{d} = \frac{maximum_{Voltage}}{minimum_{current}}\]
GATE
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Efficiency

Electrical Engineering

\[\eta = \frac{Output_{in\_k\_cal}}{Input_{in\_k\_cal}}\]
GATE
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Efficiency of the rotor

Electrical Engineering

\[\eta_{rotor} = \frac{Gross_{mechanical\_power\_output}}{Rotor_{input}}\]
GATE
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Efficiency of transformer

Electrical Engineering

\[\eta = \frac{output_{power}}{input_{power}}\]
GATE
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Electric Energy Generated

Electrical Engineering

\[Electric_{energy\_generated} = weight \cdot head \cdot overall \cdot \eta\]
GATE
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Electromagnetic torque

Electrical Engineering

\[T_{e} = \frac{Rotor_{ohmic\_loss}}{\omega_{s} \cdot slip}\]
GATE
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EMF per turn in Transformer

Electrical Engineering

\[\frac{E_{1}}{N_{1}} = \frac{E_{2}}{N_{2}}\]
GATE
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Emf under running conditions

Electrical Engineering

\[E = \sqrt{2} \cdot \pi \cdot f_{r} \cdot K \cdot w_{2} \cdot N_{p} \cdot h \cdot r \cdot \phi_{1}\]
GATE
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Energy Output

Electrical Engineering

\[Energy_output = coal_consumption \cdot calorific_value\]
GATE
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Equivalent X of t/f under N.L condition

Electrical Engineering

\[X_{0} = \frac{v_{1}}{I_{mu}}\]
GATE
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Fault Percentage reactance

Electrical Engineering

\[X = \frac{I \cdot X}{V} \cdot 100\]
GATE
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Fed at both ends with equal voltages

Electrical Engineering

\[Max_{voltage\_drop} = \frac{1}{8} \cdot IR\]
GATE
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Fed at one end

Electrical Engineering

\[V = \frac{1}{2} \cdot {irl}^{2}\]
GATE
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Flux during transformer operation

Electrical Engineering

\[B_max = constant\]
GATE
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Front Pitch (Progressive winding) in Lap winding

Electrical Engineering

\[Y_f = Y_b + 2\]
GATE
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Front Pitch (Retrogressive winding) in Lap winding

Electrical Engineering

\[Y_f = Y_b - 2\]
GATE
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Gross Cross Sectional Area of transformer

Electrical Engineering

\[Gross_cross_sectional_area = Area_occupied_by_magnetic_material + Insulation_material\]
GATE
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