A coffee maker is rated at 1150 W, a toaster at 1010 W, and a waffle maker at 13

Question

A coffee maker is rated at 1150 W, a toaster at 1010 W, and a waffle maker at 1350 W. The three appliances are connected in parallel to a common 120 V household circuit.

coffee maker
Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. A toaster
Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. A waffle maker
Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error.A

Explanation / Answer

P=VI
where p=power in watt
V=voltage/potential difference
I=current

Since it is parallel combination voltage across each remains the same


a)
coffee maker
I=P/V =1150/120=9.583A

toaster
I=P/V=1010/120=8.416A

waffle maker
I=P/V=1350/120=11.25A

b)total current is delivered to the appliances when all are operating simultaneously is the sum of individual currents
= 9.583+8.416+11.25=29.249A

C) So 15 amp circuit breaker will not do , at least 31 amp wire will be required.

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