The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. Therefore, a transformer is plugged into the wall socket and produces the necessary voltage for charging the batteries. The batteries are rated at 9.0 V, and a current of 252 mA is used to charge them. The wall socket provides a voltage of 120 V. (a) Determine the turns ratio of the transformer. (b) What is the current coming from the wall socket? (c) Find the average power delivered by the wall socket and the average power sent to the batteries. (a) N/N, = Number Units i (b) Ip = Number i Units (c) Pp = Number i Units P3 = Number i Units >

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. Therefore, a
transformer is plugged into the wall socket and produces the necessary voltage for charging the batteries. The batteries are rated at
9.0 V, and a current of 252 mA is used to charge them. The wall socket provides a voltage of 120 V. (a) Determine the turns ratio of
the transformer. (b) What is the current coming from the wall socket? (c) Find the average power delivered by the wall socket and
the average power sent to the batteries.
(a) Ng/Np = Number i
Units
(b) Ip =
Number i
Units
(c) P, =
Number i
Units
%3D
P =
Number i
Units
%3D
S
>
>
>
Transcribed Image Text:The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. Therefore, a transformer is plugged into the wall socket and produces the necessary voltage for charging the batteries. The batteries are rated at 9.0 V, and a current of 252 mA is used to charge them. The wall socket provides a voltage of 120 V. (a) Determine the turns ratio of the transformer. (b) What is the current coming from the wall socket? (c) Find the average power delivered by the wall socket and the average power sent to the batteries. (a) Ng/Np = Number i Units (b) Ip = Number i Units (c) P, = Number i Units %3D P = Number i Units %3D S > > >
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