Black V box re 4.143

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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A black box with a circuit in it is connected to a variable resistor. An ideal ammeter (with zero resistance) and an ideal voltmeter (with infinite resistance) are used to measure current and voltage as shown in Fig. 4.143. 

For Prob. 4.85.
4.86 A black box with a circuit in it is connected to a vari-
able resistor. An ideal ammeter (with zero resistance)
and an ideal voltmeter (with infinite resistance) are
used to measure current and voltage as shown in
Fig. 4.143. The results are shown in the table on
the next page.
Black
R.
box
Figure 4.143
For Prob. 4.86.
Transcribed Image Text:For Prob. 4.85. 4.86 A black box with a circuit in it is connected to a vari- able resistor. An ideal ammeter (with zero resistance) and an ideal voltmeter (with infinite resistance) are used to measure current and voltage as shown in Fig. 4.143. The results are shown in the table on the next page. Black R. box Figure 4.143 For Prob. 4.86.
(a) Find i when R = 12 Q.
(b) Determine the maximum power from the box.
R(Ω)
V(V)
i(A)
3.
16
21
1.5
284
Transcribed Image Text:(a) Find i when R = 12 Q. (b) Determine the maximum power from the box. R(Ω) V(V) i(A) 3. 16 21 1.5 284
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