Problem 26.18 Part A What is the voltage drop along the wire? Express your answe

Question

Problem 26.18

Part A

What is the voltage drop along the wire?

Express your answer with the appropriate units.
(delta)V_wire = _____?

Part B

How much power is dissipated in the wire?

Express your answer to three significant figures and include the appropriate units.

P_wire = _____?

Part C

What is the voltage drop across the device?

Express your answer to three significant figures and include the appropriate units.

(delta)V_device = _____?

Problem 26.18 The wiring in the wall of your house to and from an outlet has a total resistance of typically 0.23 Omega . Suppose a device plugged into a 120 V outlet draws 12.0A of current. Part A What is the voltage drop along the wire? Express your answer with the appropriate units. (delta)V_wire = _____? Part B How much power is dissipated in the wire? Express your answer to three significant figures and include the appropriate units. P_wire = _____? Part C What is the voltage drop across the device? Express your answer to three significant figures and include the appropriate units. (delta)V_device = _____?

Explanation / Answer

a)

voltage drop across the wire is

V = i R = ( 12 A ) ( 0.25 ohm ) = 3 V

b)

power dissipated in the wire is

P = I V

= ( 12 A ) ( 120 V )

= 1440 W

c) voltage drop across the device is

V = 120 V

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