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Electrical Engineering 40/40I/41I
Midterm 1 - Fall 1995
Professors S. Schwarz (40) and R.M. White (40I/41I)
Problem 1: [25%]
Circuit models for a battery and a physical voltmeter are shown below:
A circuit is constructed as shown below:
When the switch is open (not connected) the physical voltmeter reads 8 volts. When the switch is closed (connected) the physical voltmeter reads 6 volts. Rind RB and V B.
Page 1
Problem 2: [25%]
A two-terminal subcircuit is shown with terminals A and A'. Find its Thé venin equivalent, making your method clear. (Label the terminals AA' in your equivalent circuit)
Page 2
Problem 3: [25%]
(a) Plot the I-V characteristic of the Norton equivalent circuit having terminals B-B' on the axes below:
(b) The I-V characteristic of a load device is also plotted on these azes. If the load device is connected to terminals B-B',what current, I D , flows and what voltage, V D , appears across the load device?
(c) Under the conditions of part (b), find the power delivered to the load device.
© 1995 by Schwarz and White translated to HTML by Walter Hsiao Eta Kappa Nu (November 1995)
