115 V. This difference is enough for your eye to detect. Assume the resistance o

Question

115 V. This difference is enough for your eye to detect. Assume the resistance of the bulb does not change appreciably 11.25. (11) What is the cost of opera 5.0 kW of power and is on an average of 2.0 hriday? Assumie that the cost is70e per kWh 11.26. (II) Modern solid-state electronics consume less energy than older vacuum tube devices. Compare the cost of operating a 500- W oscilloscope to monitor a heart patient's ECG for a week to the cost of doing the same thing with a solid state oscilloscope consuming 80 W. Assume the cost of electric energy is 11.0 psr

Explanation / Answer

Ans: Given power consumed by hot-water heater (P) =5.0 kW

Operating time for one day (T)= 2.0 hrs/day

The power consumed by water heater in one day (P1)= P*T =5.0*2.0=10 kWhr/day

The power consumed by water heater in one year (P365)=P1*365=10*365=3650 kWhr

The cost of electricity per 1 Kwh is (C)= 7.0 cent

The cost of electricity for one year power consumed by heater =3650*7=25550 cents

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