11. Superposition theorem is not valid for :
(a) voltage responses
(b) current responses
(c) power responses
(d) all the three
12. Maximum power is transferred when load impedance is :
(a) equal to source impedance
(b) equal to half of the source impedance
(c) equal to zero
(d) none of the above
13. Superposition theorem is not applicable to networks containing :
(a) non-linear elements
(b) dependent voltage sources
(c) dependent current sources
(d) transformers
14. Three equal resistance of 3 Ω are connected in star. What is the resistance in one of the arms in an equivalent delta circuit ?
(a) 10 Ω
(b) 3 Ω
(c) 9 Ω
(d) 27 Ω
15. A 680 Ω load resistor, RL, is connected across a constant current source of 1.2 A. The internal source resistance, Rs, is 12 kΩ. The load current, RL, is ________.
(a) 0 A
(b) 1.2 A
(c) 114 mA
(d) 1.14 A
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5555555555 25. A 120 V voltage source has a source resistance, RS, of 60 Ω. The equivalent current source is ________. (a) 2 A (b) 4 A (c) 200 mA (d) 400 mA- 5555555555 24. A 12 mA current source has an internal resistance, RS, of 1.2 kΩ. The equivalent voltage source is ________. (a) 144 V (b) 14.4 V (c) 7.2 V (d) 72 mV
- 5555555555 23. A 2 Ω RL is connected across a voltage source, VS, of 110 V. The source's internal resistance is 24 Ω. What is the output voltage across the load? (a) 8.5 V (b) 85 V (c) 0 V (d) 110 V
- 5555555555 32. A certain voltage source has the values VS = 30 V and RS = 6 Ω. The values for an equivalent current source are ________. (a) 5 A, 6 Ω (b) 30 A, 6 Ω (c) 5 A, 30 Ω (d) 30 A, 5 Ω
- 5555555555 18. The following resistors (one each) are connected in a series circuit: 470 Ω, 680 Ω, 1 kΩ, and 1.2 kΩ. The voltage source is 20 V. Current through the 680 Ω resistor is approximately ________. (a) 60 mA (b) 30 mA (c) 6 mA (d) 300 mA