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Electromagnetism & Electronics

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Electromagnetism & Electronics

Wattless Current

The component of alternating current that is 90 degrees out of phase with AC voltage, consuming zero net electrical power.

I_wattless = I_rms sin φ A (Amperes) Electromagnetism & Electronics

Wheatstone Bridge

An electrical bridge network consisting of four resistor arms used to measure an unknown electrical resistance with high precision.

R_x = R₃ (R₂ / R₁) (when balanced: I_galvanometer = 0) Ω (Ohms)