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A transformer is to be used to provide power for a computerdisk drive that needs 6.0 V (rms) instead of the 120 V (rms) fromthe wall outlet. The number of turns in the primary is 400,and it delivers 500 mA (the secondary current) at an output voltageof 6.0 V (rms).
(a) Should the transformer have more turns inthe secondary compared with the primary, or fewer turns?
(b) Find the current in the primary.
(c) Find the current in the secondary.
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Show that the total charge contained in the charge distribution is Q. Show that the electric field in the region r = R is identical to that produced by a point charge Q at r = 0.
A butterfly at eye level is 26 cm in front of a plane mirror. You are behind the butterfly, 48 cm from the mirror. What is the distance between your eye and the image of butterfly in the mirror.
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a family wishes to purchase a heat pump for their home. The get-it-cheap co. sells a heat pump that has an operating performance 38% of the coefficient of performance of an ideal Carnot heat pump. Compute the overall coefficient of performance for ..
A 1kg ball released from horizontal attatched to a 2.5 m string collides ellastically with a 2 kg block at rest. what is the speed of the block after the collision.
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