Bulenee, I echnology, Engineering & Mathematics Electronics Engineering Technolo

Question

Bulenee, I echnology, Engineering & Mathematics Electronics Engineering Technology Program Electric Circuits I, EET 111-01 Final Exam, Fall of 2017 PARTI 4 points each question True/False. Write "T" if the statement is true and "F" if the statement is false. 1. 2. 3. An ideal voltage source has infinite internal resistance. An ideal current source has infinite internal resistan Maximum Power transfer occurs when the load resistance equals the source resistance. 4. The superposition theorem is used to simplify circuit analysis where two or more sources are present. 5. Thevenin's theorem is used to simplify complex networks to a simple voltage source with its source resistance. Multiple Choice. Choose the one alternative that best completes the statement or answers the question. Two Ikg2 resistors are in series and this series combination is in parallel with a 2.2k resistor. The voltage across one of the 1 k resistors is 6V. The voltage across the 2.2 is 6.

Explanation / Answer

ANS) PART-I

1) ans) FALSE :-An Ideal voltage source has infinite internal resistance

Reason: An ideal voltage source maintains same voltage whatever be the load hence voltage drop in it is zero i.e because ideal voltage source has zero internal resistance which is in series with the voltage source

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2)ans) TRUE :-An Ideal current source has infinite internal resistance

Reason :An ideal current source maintains constant current irrespective of load hence its internal resistance which is in parallel with the current source is infinite i.e it acts as open circuit ,so no current drawn by internal resistance and all the current flows through the load

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3)ans) TRUE :- Maximum power transfer occurs when load resistance equals source resistance

proof:Maximum power transfer theorem

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4)ans TRUE: Superposition theorem used to simplify circuit analysis when two or more sources present in it

Reason: By superposition theorem we can find the response (voltage or current or power) across element due to multiple sources in a network by considering one source at a time and algebraically add the individual responses to get total response

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5)ans: TRUE: Thevinin's theorem is used to simplify complex network into voltage source with its resistance

Reason: Thevinins theorem

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