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# if source impedance is complex then maximum power transfer occurs when the load impedance is

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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

Option 2 : R - jX

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## Detailed Solution

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

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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Last updated on Sep 22, 2022

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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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Q1. Find the Thevenin resistance (Rth) across MN for the above circuit.Q2. Find the current I in the above circuitQ3. The maximum power drawn by the load RL in the above circuit will beQ4. A dc circuit is Thevenized and found to have parameters as 25Ω and 10V. What will be the maximum power transferred to the load?Q5.  _____ cannot be applied to circuits containing _____.Q6. In the given circuit, viewed from AB, the circuit can be reduced to an equivalent circuit as:Q7. A circuit is replaced by its Thevenin's equivalent to finding current through a certain branch. If VTH = 10 V and RTH = 20 Ω, the current through the branch:Q8. What does Millman’s theorem yield?Q9. Simplify circuit given below into current source -Q10. Determine Thevenin equivalent resistance RTH for the circuit shown in figure -

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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

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

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

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.

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

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

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’.

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

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Mohammed 4 day ago

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