A coffee maker is rated at 1210 W, atoaster at 1110 W, and a waffle maker at1410

Question

A coffee maker is rated at 1210 W, atoaster at 1110 W, and a waffle maker at1410 W. The three appliances are connectedin parallel to a common 120 V household circuit. (a) What is the current in each appliance whenoperating independently? coffee maker A toaster A waffle maker A
(b) What total current is delivered to the appliances when all areoperating simultaneously?
A
(a) What is the current in each appliance whenoperating independently? coffee maker A toaster A waffle maker A
(b) What total current is delivered to the appliances when all areoperating simultaneously?
A
coffee maker A toaster A waffle maker A

Explanation / Answer

The current for each is found by the power formula (with knownvoltage and power): P = V*I Where: P = power V = volts (Voltage is constant in parallel circuits) I = current (currents add for total current in parallelcircuits) Rearrange to find I: I = P/V 1210 = 120 * I I = 1210/120 I = 10.08 amps 1110 = 120 * I I = 1110/120 I = 9.25 amps 1410 = 120 * I I = 1110/120 I = 11.75 amps Add all currents together to get total current: 10.08 + 9.25 + 11.75 = 31.08 amps 1110 = 120 * I I = 1110/120 I = 9.25 amps 1410 = 120 * I I = 1110/120 I = 11.75 amps Add all currents together to get total current: 10.08 + 9.25 + 11.75 = 31.08 amps 1410 = 120 * I I = 1110/120 I = 11.75 amps Add all currents together to get total current: 10.08 + 9.25 + 11.75 = 31.08 amps 1410 = 120 * I I = 1110/120 I = 11.75 amps Add all currents together to get total current: 10.08 + 9.25 + 11.75 = 31.08 amps

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