A transformer has 380 primary turns and 1140 secondary turns. The input voltage is 120 V and the output current is 16.5A. Assume 100% efficiency. A) What is the output voltage? B) What is the input current?
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- Integrated Concepts Hydroelectric generators (see Figure) at Hoover Dam produce a maximum current of 8.00×103A at 250 kV. (a) What is the power output? (b) The water that powers the generators enters and leaves the system at low speed (thus its kinetic energy does not change) but loses 160 m in altitude. How many cubic meters per second are needed, assuming 85.0% efficiency?A transformer has 600 turns on its secondary and 100 turns on its primary. The primary is connected to a 20-V source. (a) What is the voltage output of the secondary? V (b) If 3 A flows in the primary coil, how much current is there in the secondary coil? AMost household power in North America is 120? alternating current (VAC). However, some high-power appliances such as electric ranges and clothes dryers typically require a special 220?circuit. In this problem, you will calculate the energy, power, and current required by a dryer. You will also compare different methods of storing the energy required to run this appliance in a typical drying cycle. Consider a dryer that operates on 220?electricity, and it consumes an average power of 3000?. For this homework, the “Alternating Current” part of the story is irrelevant, so please use our ordinary DC equations (Perhaps this dryer has been specially made for physics experiments so it has a second input that allows it to operate on DC voltage as well!) A cubic meter of “natural gas” (mostly methane) at atmospheric pressure contains about40?? of usable energy. How much natural gas (in m3) would it take to power the dryer for 30minutes? Do some googling, and make an estimate (that means getting…
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