Related InterviewSolutions

• When maximum power transfer takes place, the efficiency of power transfer of the circuit is (A) 100% (B) 75% (C) 50% (D) 25%
• An ideal voltage source should have: (A) Zero source resistance (B) Infinite source resistance (C) Terminal voltage is proportional to current (D) Open-circuit voltage nearly equal to voltage of the load current
• The superposition theorem requires as many circuits to be solved as there are: (A) Nodes (B) Sources (C) Nodes and Sources (D) Nodes, Sources and Mesh
• A wire of resistance R has it length and cross-section both doubled. Its resistance will become (A) 4 R (B) 2 R (C) R (D) R / 4.
• Which of the following is not the same as watt?(A) joule/sec (B) amperes/volt (C) amperes x volts (D) ( amperes )2 x ohm.
• Ohm's law is not applicable to(A) DC circuits (B) high currents (C) small resistors (D) semi-conductors.
• Transformer is a device which (A) Work through on electric induction. (B) Can step up or step down the level of voltage. (C) All of these (D) Its Working without changing the Power.
• In alternator frequency f= (A) NP/120 (B) NP120 (C) N/120P (D) 1/NP120 
• Transfer of electrical power from primary to secondary in a transformer takes place (A) Electrically (B) Magnetically (C) None of these (D) Electromagnetically
•  If a sinusoidal exciting current is applied to a transformer, the mutual flux produced is(A) Zero (B) Sinusoidal (C) Flat top (D) Negative