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The primary of a step-down transformer has 290 turns and is connected to a 120 V rms line. The secondary is to supply 17 A at 7 V.
(a) Find the current in the primary.
A
(b) Find the number of turns in the secondary, assuming 100% efficiency.
An electron with kinetic energy of 6.0 x 10-16 J is moving to the right along the axis of a cathode-ray tube. There is an electric field vector = (2.0 x 104 N/C) j in the region between the deflection plates.
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