What factors determine the resistance of a wire?

There are several factors that affect the resistance of a conductor;

• material, eg copper, has lower resistance than steel.
• length – longer wires have greater resistance.
• thickness – smaller diameter wires have greater resistance.
• temperature – heating a wire increases its resistance.

What are the four things that affect the resistance of a wire?

There are 4 different factors which affect resistance:

• The type of material of which the resistor is made.
• The length of the resistor.
• The thickness of the resistor.
• The temperature of the conductor.

What is the resistance of 18 gauge wire?

Common Wire Gauges

AWG wire size (solid)	Diameter (inches)	Resistance per 1000 ft (ohms)
20	0.0320	10.15
18	0.0403	6.385
16	0.0508	4.016
14	0.0640	2.525

How does resistance depend on nature of material?

The resistance of a length of material is proportional to its length and inversely proportional to the material’s cross sectional area. With a given material, resistance increases with length and decreases with greater cross sectional area.

What is resistance of a wire?

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. The resistance of a conductor, or circuit element, generally increases with increasing temperature.

How do you measure resistance in a circuit?

Instead, resistance is calculated by measuring the current and voltage applied to the circuit. When a current is applied to the circuit under measurement, the circuit (resistance) exhibits a voltage (or more precisely, a voltage drop). Resistance can be calculated by measuring the current and voltage using Ohm’s Law.

How much resistance is normal?

In the first example, total normal circuit resistance, a known reference value, is 60 Ω (240 ÷ 4 = 60 Ω). The 60 Ω resistance can help determine the condition of a circuit.