Current and Resistance, EMF, Terminal Voltage, Kirchoff's Law

Front

What is current?

Back

Current is the flow of electric charge, measured in Amperes (A).

Front

What is resistance?

Back

Resistance is the opposition to the flow of electric current, measured in Ohms (Ω).

Front

What is EMF (Electromotive Force)?

Back

EMF is the voltage generated by a battery or other source, measured in Volts (V).

Front

What is terminal voltage?

Back

Terminal voltage is the voltage output of a battery or power source when a load is connected.

Front

What is Kirchhoff's First Law?

Back

Kirchhoff's First Law states that the total current entering a junction equals the total current leaving the junction.

Front

What is Kirchhoff's Second Law?

Back

Kirchhoff's Second Law states that the sum of the EMF in a closed loop equals the sum of the potential drops in that loop.

Front

How do you calculate equivalent resistance in a parallel circuit?

Back

1/R_eq = 1/R1 + 1/R2 + 1/R3 + ...

Front

What is resistivity?

Back

Resistivity is a material property that quantifies how strongly a given material opposes the flow of electric current, measured in Ohm-meters (Ω•m).

Front

What is the formula for calculating resistance?

Back

Resistance (R) = Resistivity (ρ) × Length (L) / Area (A).

Front

What is the temperature coefficient of resistance?

Back

The temperature coefficient of resistance is a measure of how much a material's resistance changes with temperature.