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Circuit Theory Question Paper

Circuit Theory

Course:Bachelor Of Electrical And Electronics Engineering

Institution: Moi University question papers

Exam Year:2010

CIRCUIT THEORY REVIEW QUESTIONS.

1. What force of attraction (newtons) will act on a single electron located 0.5 cm from a point charge of +0.005 mC?

2. Two electric charges, one of which is four times as large as the other, develop a mutual force of repulsion of 16 newtons when they are located 12 cm apart. Determine the magnitude of each charge.

3. Two parallel plates 1 cm apart are connected to a 500-V source. What force will be exerted on a free electron between the plates?

4. How many electrons must be removed from one slave of a 270-pF capacitor and added to the other to raise the voltage between the plates to 420 V?

5. A neutralizing capacitor in a radio transmitter consists of two aluminium disks, each 10 cm in diameter and 0.5 cm apart with air between them. What is its capacitance?

6. A 0.001 mF and a 0.004 mF capacitor are connected in parallel to a 400-V source.

a. What is the total capacitance?
b. What is the magnitude of the charge stored by each capacitor?

7. A 0.001 mF, a 20 mF and a 40 mF capacitor are connected in series to a 400-V source.
a. What is the equivalent capacitance?
b. What is the magnitude of the charge stored by each capacitor?
c. What is the voltage across each capacitor?

8. Given three capacitors of 0.01, 0.02, and 0.05 micro Farads, respectively, and a rated working voltage of 400 V For each capacitor, what is the highest voltage that can safely be applied to the series combination of the three capacitors?

9. What is the total elastance of a combination of the three capacitors in question 8 above, connected
a. In series
b. In parallel?

Circuit Theory Question Paper

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