Compute the voltage drop along a 26-m length of household no. 14 copper wire (used in 15-a circuits). the wire has diameter 1.628 mm and carries a 13-a current. the resistivity of copper is 1.68×10−8ω⋅m. express your answer to two significant figures and include the appropriate units

V= 2.7 [v]

Explanation:

The value of the resistance is given by:

so:

We can calulate the voltage dropped using the Ohm's law:

d.7.5cm is your answer

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27