Problem 12-42 Electric power - Part 3 - A

A \(1.10\;kW\) hairdryer and a \(60.0\;W\) light bulb are turned on in the same \(120\;V\; AC\) parallel circuit. Assuming three significant digits in the given voltage, determine the current in the (a) hairdryer (b) light bulb (c) fuse in the circuit. (d) If the fuse is rated at \(15 \;A,\) will it blow?

[Ans. (a) \(9.17\; A\)   (b) \(0.500\; A\)   (c) \(9.67 \;A\)  (d) \(\text{no}\)]

Accumulated Solution

Circuit diagram with a light and hairdryer.

\(W = \Delta VI\)

No. You have used the power in \(kW\). How many watts are there in a \(kW\)?

10

100

1000

1000000

Choose one.