College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Textbook Question
Chapter 20, Problem 83PE
Find the time after t = 0 when the instantaneous voltage of 60-Hz AC first reaches the following values: (a) V0/2 (b) v0 (c) 0.
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(b)
For the dc network shown in Figure Q3 (b), calculate the following:
i.
The indicated voltage V1 and V2
ii.
The power dissipated in the 3 kQ and 20-kO resistors
i.
The power supplied by the current source.
iv.
The current through 1 kQ and 3 kQ
1 kQ
3 ΚΩ
(4)30 mA
5 k2
20 kΩ
Figure Q3 (b)
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(b)
Two units of DC voltmeters, A and B are used to measure a voltage from a resistor R2 as in
Figure Q4 (b).
These instrument specifications are stated as below:
Meter A: Sensitivity S = 3 kN/V, Internal Resistance Rm = 0.5 kN, Range = 15 V
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Meter B: Sensitivity S = 15 kN/V, Internal Resistance Rm = 3 kN, Range = 20 V
%3D
Ri=5kQ
30 V
RF 25k2
Figure Q4(b)
Calculate:
(i)
Voltage across R2 without any instrument connected.
(ii)
Voltage across R2 using instrument A.
(iii)
Voltage across R2 using instrument B.
(iv)
Absolute error for each measurement.
(b)
For the dc network shown in Figure Q3 (b), calculate the following:
i.
The indicated voltage V, and V2
i.
The power dissipated in the 3 kQ and 20-k2 resistors
ii.
The power supplied by the current source.
iv.
The current through 1 kQ and 3 kQ
1 kQ
3 k2
30 mA
5 kQ
20 k2
Figure Q3 (b)
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Chapter 20 Solutions
College Physics
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