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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. How would you justify the statement that the current is the same in all parts of a simple series circuit?

2. How would you justify the statement that the total resistance of a series circuit is the sum of all the individual resistances?

3. Prove that in a series circuit, the ratio between any two power dissipations is the same as the ratio between the two resistances.

4. A lamp, rated at 120 V, 100 W and one rated at 120 V, 25 W are connected in series to a 120-V source. Which one will glow more brightly? Explain.

5. Explain the visible effect when the 25-W lamp in question 4 is
a. Open-circuit and
b. Short-circuit

6. What disadvantage does the "series string" type of Christmas tree lamp possess as compared to the 110-V parallel type of Christmas tree lamp?

7. How would you go about determining the internal resistance of a given flashlight battery?

8. Explain why the kitchen light becomes a bit dimmer when a toaster is turned on.

9. When a storage battery is discharging, its terminal voltage is less than its open-circuit voltage; but when it is being charged, its terminal voltage is greater than its open-circuit voltage. Explain

10. Generator B develops three times the open-circuit voltage of generator A but has three times as great an internal resistance. Each generator is developing the same power in its load. Which has the greater efficiency?

11. A generator is operated in such a manner that its terminal voltage is kept constant by increasing its generated potential difference as the load current is increased. Does this mean that ve efficiency is 100%? Explain.

Circuit Theory Question Paper

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