For each of the multiple choice questions below circle the o

For each of the multiple choice questions below, circle the one best answer. If you really don\'t like any of the choices, you can write in your own. These five questions are all independent of each other. Which of the following statements are true? (i) Two-port networks are used to represent a circuit by an equivalent circuit relative to a pair of terminals. (ii) Two-port networks are used to represent a circuit by an equivalent circuit relative to two pairs of terminals. (iii) Two-port networks are a useful circuit analysis tool for finding any i or v in a circuit using an efficient equivalent circuit model. (iv) The circuit represented by a two-port network can contain any combination of sources (independent or dependent) and impedances (R, L, C). Which of the following statements is not true for balanced 3- power systems? (i) The current in the neutral line is zero. (ii) The 3- system can be analyzed using a single-phase equivalent circuit. (iii) The total instantaneous power (t) is constant, causing less vibration in machinery. (iv) 3- generators use 3 windings around one electromagnet. (v) 3- power systems do not need transformers.

Solution

2) ii

3) v