Questions №1 Constant current linear electric circuits

Worked out by: Sharofov S.
Head of “EEE” Department: Usmonov Sh.
---------------------------------------------------------------------------------------------------------------------


QUESTIONS №20

1. 
   Three-phase alternating current electric circuits?
   

(system, energy source, EMF, phase shift, phase, line, consumer, generator, transmission line, rotor, stator, induction, symmetrical, EMF expression, sequence, vector diagram, star, triangle, line and phase voltage, relationship, neutral, Kirchhoff's laws, sum, symmetrical consumer)

2. 
   A circuit contains a 10 Ohm heater and six 240 Ohm lamps, each containing a 60 Watt bulb, all connected in series. The voltage across the circuit is 120 V. What is the current in the circuit when only 4 lamps are turned on? What is the current in the circuit when all the lamps are turned on?
   
3. 
   R₁= 10- resistor and two R₂=5- resistors is connected in series to a 120-V generator.
   

a. Draw the circuit diagram.
b. What is the total resistance of the load?
c. What is the potential difference across the R₁ resistors?
e. What is the potential difference across the R₂ resistor?


Worked out by: Sharofov S.
Head of “EEE” Department: Usmonov Sh.