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A charging cell phone battery requires a current of 1.60 A and power is dissipated in the battery at 7.52 W. Assume that the charger contains a perfect transformer.
a) If the charger is plugged into a standard wall socket in Philadelphia (120 V AC), determine the voltage supplied to the battery.
b) Determine the current drawn from the wall by the charger.
c) Determine the ratio of the number of primary to secondary turns within the transformer in the charger and determine the minimum values of Np and Ns.
d) State whether the transformer is a step-up or a step-down transformer. Justify your answer.
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what is the angle formed between wire and ground?
The air inside a bicycle tire pump has 193 joules of work done on it as 77.3 joules of heat is conducted away from it. What is the change in internal energy of the air
An electron beam in an oscilloscope is deflected by the electric field produced by oppositely charged metal plates. If the electric field between the plates is 2.75 105 N/C directed downward, what is the magnitude and direction of the force on eac..
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