Hello friends,
I am completely newbie in basic electronics and i really don't know how to answer this assignment i have. I don't know how to approach the solution, please help me get the right answers for this questions or point in the direction how to approach the solutions.....
https://img33.picoodle.com/img/img33/4/7/29/f_FIGURE5m_0ef3e59.jpg
questionnaires:
1) Look at the circuit. An ammeter is being used to measure the current in the primary winding. The ammeter displays a reading of 2 A. Which is the following statements about the switch positions is correct?
a) only sw S1 is closed b) switch s1 and sw s2 are both closed c) only sw s3 is closed d) all the three switches are closed.
2) Look again at the circuit. Assuming that all switches are closed, which of the ff. statements are correct.
a) resistor r1 will reach highest temp.
b) R2 will reach the highest temp.
c) R3 will reach the highest temp.
d) all 3 resistors have the same temp.
3) In the same circuit. when all 3 switches are closed, the power in the primary circuits is .
a) at maximum b) 200 W c) less than that any single secondary winding d) reduced by eddy current losses.
4) compared to a single-phase alternator, a three phase alternator will generate?
a) a higher output voltage b) three sine waves 120 degrees displaced c) a higher output current d) three sine waves delta-connected.
Please give me an idea which is the correct answer or how to solve the problem.
Thank you in advance....