Power delivered by 6A current source

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Direction: 20 to Q. 25. For the circuit shown below—

Power delivered by 6A current source—

1. 6W
2. – 6W
3. 24W
4. – 24W

Correct Option: B

From figure given in solution 21:
Voltage across terminal D and C is 1V
since terminal D is negative, therefore power delivered by 6A current source is negative
P_delivered = – VI = – 1 × 6 = – 6W.