Resistors and Ohm's Law Video Lessons

Concept

# Problem: Which of the following will increase the resistance of a wire? (More than one answer may be correct - select all correct answers).Select one or more:a. Increasing the cross-sectional area of the wire will increase the resistance of the wire.b. Increasing the resistivity of the material the wire is composed of will increase the resistance of the wire.c. Increasing the length of the wire will increase the resistance of the wire.d. Decreasing the resistivity of the material the wire is composed of will increase the resistance of the wire.e. Decreasing the cross-sectional area of the wire will increase the resistance of the wire.f. Decreasing the length of the wire will increase the resistance of the wire.

###### FREE Expert Solution

Resistance:

$\overline{){\mathbf{R}}{\mathbf{=}}\frac{\mathbf{\rho }\mathbf{L}}{\mathbf{A}}}$

ρ is the resistivity, L is the length and A is the cross-sectional area.

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###### Problem Details

Which of the following will increase the resistance of a wire? (More than one answer may be correct - select all correct answers).

Select one or more:

a. Increasing the cross-sectional area of the wire will increase the resistance of the wire.

b. Increasing the resistivity of the material the wire is composed of will increase the resistance of the wire.

c. Increasing the length of the wire will increase the resistance of the wire.

d. Decreasing the resistivity of the material the wire is composed of will increase the resistance of the wire.

e. Decreasing the cross-sectional area of the wire will increase the resistance of the wire.

f. Decreasing the length of the wire will increase the resistance of the wire.