The given circuit:

The equivalent circuit for calculating time constant is shown below:

Now, time constant,

Correct Option: C

The given circuit:

The equivalent circuit for calculating time constant is shown below:

Now, time constant,

From above figure:
Voltage across terminals A and C is 30 – 4 = 26V; since terminal A is positive, therefore power delivered by the 8A current source is positive
P_delivered = VI = 26 × 8 = 208W.

Correct Option: A

From above figure:
Voltage across terminals A and C is 30 – 4 = 26V; since terminal A is positive, therefore power delivered by the 8A current source is positive
P_delivered = VI = 26 × 8 = 208W.

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.

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.

From figure given in solution 21, we conclude that current passing through 2Ω resistor is 15A. So power absorbed by 2Ω resistor.
P_absorbed = I²R = 15² × 2 = 450W.

Correct Option: A

From figure given in solution 21, we conclude that current passing through 2Ω resistor is 15A. So power absorbed by 2Ω resistor.
P_absorbed = I²R = 15² × 2 = 450W.

The power absorbed by the element F is negative since here current exits from the positive terminal.

Correct Option: C

The power absorbed by the element F is negative since here current exits from the positive terminal.