Ohm's Law and Wire Resistance Quiz

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Ohm's law relates the potential difference (V) to the current (I) through a constant called resistance (R).

The resistance of a wire increases with its length; a longer wire has greater resistance.

A superconductor is a material that allows electric charge to flow with no resistance.

<p>The unit of electrical resistance is the ohm ($ ext{Ω}$), representing one volt per ampere (V/A).</p> Signup and view all the answers

<p>The two factors are the material type and the wire diameter, with larger diameters having lower resistance.</p> Signup and view all the answers

The ratio of potential difference (V) to current (I) in a conductor.

An electrical component designed to have a specific resistance.

The unit of electrical resistance, equal to one volt per ampere (V/A).

A material where electrical charge flows with no resistance.

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A conductor that does not follow Ohm's law, meaning the ratio of voltage to current is not constant.

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Ohm's law describes the relationship for most conductors, where the ratio of potential difference (voltage) to current is a constant, called resistance.
A resistor is a component with a set resistance.
The unit of electrical resistance is the ohm (Ω), equivalent to one volt per ampere (V/A).

Four factors influence the resistance of a wire:
- The type of material: Different materials have different resistances.
- Length: Longer wires have higher resistance.
- Diameter: Wires with larger diameters have lower resistance.
- Temperature: Warmer wires have higher resistance.