EBK PHYSICS FOR SCIENTISTS & ENGINEERS
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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Chapter 40, Problem 8P

(I) Show that the quantity 2 / I has units of energy.

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(I) An ac voltage, whose peak value is 180 V, is across a 310 Ωresistor. What are the rms and peak currents in the resistor?
(tı, Vi) (t2, V.) A voltage vs. time plot is given above for a discharging capacitor, which follows the equation V(t) = Ve-t/T. If t_1 = 2.4 ms, t_2 = 10 ms, V1 = 12 V, and V2 = 1.2 V, the %3D %3D %3D time constant is equal to ms.
A) A transformer for a transistor radio reduces 120 V ac to 9 V ac (Such a device also contains diodes to change the 9 V ac to de). The secondary contains 30 tums and the radio draws 400 mA. Calculate (a) the number of turns in the primary, (b) the current in the primary.
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