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    If source impedance is complex, then maximum power transfer occurs when the load impedance is _______ the source impedance.

    If source impedance is complex, then maximum power transfer occurs when the load impedance is _______ ... of (d) negative of complex conjugate of

    If source impedance is complex, then maximum power transfer occurs when the load impedance is _______ the source impedance.

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    [Solved] In case of ac circuit if source impedance is (R + jX) maximu

    Maximum power transfer theorem for AC circuits: The maximum power transfer theorem states that the maximum power flow through an AC circuit will occur when&nbs

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    In case of ac circuit if source impedance is (R + jX) maximum power transfer occurs when load impedance is:

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    NBCC JE Electrical 29 Oct 2017 Official Paper

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    12(R+jX) R - jX R + jX None of these

    Answer (Detailed Solution Below)

    Option 2 : R - jX

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    Maximum power transfer theorem for AC circuits:

    The maximum power transfer theorem states that the maximum power flow through an AC circuit will occur when the load impedance is equal to the complex conjugate of the source impedance as viewed from its output terminals.

    When the load impedance matches the Thevenin equivalent resistance of the given circuit, maximum power is transferred to it. i.e.

    If RL = Rth, Maximum power is transferred to the Load.

    ZL = ZS* |ZL| = |ZS|

    Explanation:

    Zs = R + jX

    For maximum power transfer

    ZL = ZS* = (R + jX)* = R - jX

    Load variable

    The load impedance for maximum power transfer

    RL and XL are variable

    RL = RS XL = -XS ZL = ZS* RL only varied and XL = Constant

    RL =√(RS2 + (XL + XS)2)

    RL only varied and XL = 0 RL =√(RS2 + XS2)

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    More Maximum Power Transfer Theorem Questions

    Q1. The maximum power drawn by the load RL in the above circuit will beQ2. A dc circuit is Thevenized and found to have parameters as 25Ω and 10V. What will be the maximum power transferred to the load?Q3. In the lattice network, the value of RL for the maximum power transfer to it isQ4. Given condition justifies which network theorems: The load impedance should be complex conjugate of the internal impedance of the active network.Q5. In case of max power transfer voltage drop across RL is:Q6. In case of ac circuit if source impedance is (R + jX) maximum power transfer occurs when load impedance is:Q7. In maximum power transfer theorem, load RL will draw maximum power when:Q8. For what value of resistance across terminal A-B, the power transfer will be maximum?Q9. Calculate the value of R to be connected across A - B for maximum power transfer.Q10. In the circuit, the maximum power that can be transferred to Load ZL is

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    Maximum Power Transfer Theorem

    This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Maximum Power Transfer Theorem”. 1. The maximum power is delivered from a source to its load when the load resistance is ______ the source resistance. a) greater than b) less than c) equal to d) less than or equal to 2. If ... Read more

    Network Theory Questions and Answers – Maximum Power Transfer Theorem

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    This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Maximum Power Transfer Theorem”.

    1. The maximum power is delivered from a source to its load when the load resistance is ______ the source resistance.

    a) greater than b) less than c) equal to

    d) less than or equal to

    View Answer

    2. If source impedance is complex, then maximum power transfer occurs when the load impedance is _______ the source impedance.

    a) equal to b) negative of

    c) complex conjugate of

    d) negative of complex conjugate of

    View Answer

    3. If the source impedance is complex, then the condition for maximum power transfer is?

    a) ZL = ZS b) ZL = ZS* c) ZL = -ZS d) ZL = -ZS* View Answer

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    4. If ZL = ZS*, then?

    a) RL = 1 b) RL = 0 c) RL = -RS d) RL = RS View Answer

    5. For ZL = ZS*, the relation between XL and XS is?

    a) XL = XS b) XL = 0 c) XL = 1 d) XL = -XS View Answer

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    6. In the circuit shown below, find the value of load impedance for which source delivers maximum power.

    a) 15-j20 b) 15+j20 c) 20-j15 d) 20+j15 View Answer

    7. What is the load current in the following circuit?

    a) 1.66∠90⁰ b) 1.66∠0⁰ c) 2.66∠0⁰ d) 2.66∠90⁰ View Answer advertisement

    8. The maximum power delivered by the source in the below circuit shown?

    a) 39.33 b) 40.33 c) 41.33 d) 42.33 View Answer

    9. For the circuit shown, the resistance R is variable from 2Ω to 50Ω. What value of RS results in maximum power transfer across terminals ‘ab’.

    a) 1 b) 2 c) 3 d) 4 View Answer advertisement

    10. Find the maximum power delivered by the source in the following circuit.

    a) 96.6 b) 97.6 c) 98.6 d) 99.6 View Answer

    Sanfoundry Global Education & Learning Series – Network Theory.

    To practice all areas of Network Theory, here is complete set of 1000+ Multiple Choice Questions and Answers.

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