8/19/2019 Electronics 1 Practice Midterm

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  NAME: ID Number:

ENME 350 Midterm 1, Spring 2015

Problem 1: Short answer.

a. Find the values of i1 and i2 in the figure below. (10 pts)

b. The voltage across a 0.5 H inductor is shown below. The initial current in the inductor is 0 A.

Sketch the current, power, and stored energy vs. time. (10 pts)

Problem 2: Find the Thevenin equivalent circuit using NODAL ANALYSIS (you will not receive

credit for any other method). (20 pts)

Problem 3: Find the voltage vx in the circuit below using MESH CURRENT ANALYSIS (you will

not receive credit for any other method). (20 pts)

8/19/2019 Electronics 1 Practice Midterm

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  NAME: ID Number:

ENME 350 Midterm 1, Fall 2015 

Problem 1: Short answer. Draw a box around your answers.

a. An inductor of L=0.5 H is suddenly connected to a voltage source of 10V at time t=0. What is

the energy [J] stored within the inductor at time t=0.1s? (5 pts)

b. What is the equivalent capacitance looking into terminals a and b in the circuit below? (5 pts)

c. If the energy stored in a 44 µF capacitor at a given time is 2 J and is decreasing at 100 J/s, whatis the current and voltage across the capacitor? (10 pts)

Problem 2: Consider the circuit below. Use NODAL ANALYSIS in this problem. You will not

receive credit for other methods used. (20 pt) 

a. Find the Norton equivalent looking into terminals a and b.

b. What is the value of the load resistance R L which if added across terminals a and b wouldproduce maximum power dissipation in R L?

c. What is the maximum power that can be dissipated in R L? 

Problem 3: Consider the circuit below. Use MESH CURRENT ANALYSIS in this problem. You

will not receive credit for other methods used. We know that i1=3i2. Find i1, i2, i3, and the voltage V.

(20 pts)