A copper wire is connected across a constant voltage source. Which change will cause an increase in the current flowing through the wire? A. an increase in the length of the wire B. an increase in the resistance of the wire C. an increase in the diameter of the wire D. an increase in the insulation around the wire

A copper wire is connected across a constant voltage source. An increase in the length of the wire will cause an increase in the current flowing through the wire.

What is resistance of wire?

Resistance is proportional to resistivity and length, and inversely proportional to cross sectional area.

[tex]R =\dfrac{\rho l}{A}[/tex]

Where,

ρ is resistivity of wire which is same for a material.

[tex]l[/tex] is length of wire.

[tex]A[/tex] is cross sectional area .

For constant voltage and increase in current flowing through the wire, one have to increase the resistance of the wire. That means we have to increase the length of wire.

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