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

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