Question

question 10 of 20
how does increasing the length of a wire affect a circuit?
a. it increases the voltage.
b. it increases the resistance.
c. it decreases the voltage.
d. it decreases the resistance.

Explanation:

The resistance formula is \(R =
ho\frac{l}{A}\) (where \(R\) is resistance, \(
ho\) is resistivity, \(l\) is length, \(A\) is cross - sectional area). When the length \(l\) of the wire increases (assuming \(
ho\) and \(A\) remain constant), the value of \(R\) increases. Voltage in a simple circuit is provided by the power source (like a battery) and is not directly affected by the length of the wire in the way described in options A and C.

Answer:

B. It increases the resistance.