Which one of the following impedance values of load will

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Which one of the following impedance values of load will cause maximum power to be transferred to the load for the network shown in the given figure?

1. (2 + j2) Ω
2. (2 – j2) Ω
3. – j2 Ω
4. 2 Ω

Correct Option: D

In order to transfer the maximum power to the load
Z_L = Z*_m (i.e. complex conjugate of the thevenin impedance)
Calculation for Z_th:
Z_th = J2 + (2 + J2) || – J2

= J2 +	(2 + J2) (–J2)
	2 + J2 – J2

= J2 +	J4 – J²4
	2

=	4J – J4 – J²4
	2

=	4	= 2 Ω
	2