Electronic Principles  Section 3 Multiple Questions and Answers.
Exercise Questions ::
Electronic Principles
1.  Which one of the following statements is true for the voltages in a series RL circuit? 
 
 A.  The total voltages is equal to the sum of the voltages across the resistance and inductance 
 B.  The voltage always has the same amplitude and phase for every part of the circuit 
 C.  The total voltage is less than the sum of the voltages across the resistance and inductance 
 D.  The total voltage lags the total current by less than 90 


Published by:Michael Daani
2.  The core of an electromagnet is said to be in saturation when: 
 
 A.  the core is permitted to move freely within the coil 
 B.  an increase in current through the coil causes no further increase in the mmf 
 C.  frequent changes in the direction of current through the coil causes heating effects in the core material 
 D.  changing the polarity of the current in the coil changes the polarity of the magnetic field around the core 


Published by:Michael Daani
Published by:Michael Daani
4.  Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91? 
 
 A.  200 W 
 B.  1000 W 
 C.  20 W 
 D.  100 W 


Published by:Michael Daani
5.  Doubling the diameter of the coil in an inductor: 
 
 A.  multiplies the value of inductance by two 
 B.  reduces the value of inductance by onehalf 
 C.  reduces the value of inductance by onefourth 
 D.  multiplies the value of inductance by four 


Published by:Michael Daani
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