Ohm's Law and Resistivity Worksheet

Practice flashcards covering fundamental electrical concepts including Ohm's Law, charge calculations, and wire resistivity based on classwork problems.

Ohm's Law

The relationship between current, voltage, and resistance, defined by the formula $I = \frac{V}{R}$.

Electric Current ($I$)

The flow of electric charge through a circuit, measured in Amperes ($A$).

Voltage ($V$)

The potential difference or electromotive force that pushes charge through a circuit, measured in Volts ($V$).

Electrical Resistance ($R$)

The opposition to the flow of electric current, measured in Ohms ($\Omega$).

Electric Charge ($Q$)

The total amount of electricity passing through a circuit, calculated as the product of current and time ($Q = I \times t$) and measured in Coulombs ($C$).

Resistivity ($\rho$)

An intrinsic property of a material that determines its resistance based on length ($l$) and area ($A$), using the formula $R = \frac{\rho \times l}{A}$. It is measured in Ohm-meters ($\Omega-m$).

Cross-sectional Area ($A$)

The area of the wire's end through which current flows, calculated using the formulas $A = \frac{\pi \times d^2}{4}$ or $A = \pi \times r^2$.

Electromotive Force (emf)

The potential difference provided by a source such as a battery, measured in Volts ($V$).

Ampere ($A$)

The standard unit for measuring electric current, defined as the amount of charge passing through a circuit per second ($I = \frac{Q}{t}$).

Coulomb ($C$)

The standard unit for measuring electric charge ($Q$).

Ohm ($\Omega$)

The standard unit for measuring electrical resistance ($R$), represented by the Greek letter omega ($\Omega$).