Answered: Transformer 5 000 V R5 Figure P21.25 ll

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter21: Circuits And Dc Instruments

Section: Chapter Questions

Problem 4CQ: Why is the power dissipated by a closed switch, such as in Figure 21.43, small?

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Question

A person is working near the secondary of a transformer, as
shown in Figure P21.25. The primary voltage is 120. V (rms)
at 60.0 Hz. The capacitance C_s, which is the stray capacitance
between the hand and the secondary winding, is 20.0 pF.
Assuming the person has a body resistance to ground of
R_b = 50.0 kΩ, determine the rms voltage across the body.
Hint: Redraw the circuit with the secondary of the transformer
as a simple AC source.

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