Questions №1 Constant current linear electric circuits

Worked out by: Sharofov S.
Head of “EEE” Department: Usmonov Sh.
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QUESTIONS №13
1. DC machines:
(property of return, armature, stand, collector, brush, poles, magnetic system, magnetic field, construction, EMF, neutral, moment, power balance, opposing EMF, excitation, circuit, descriptions, scheme
2. Three resistors, whose values are 30 , 45 , and 90 , are connected in parallel across a 35 V battery. Draw the circuit diagram. What is the current through the 45  resistor?
3. T = 0.2 s; 1 s; 40 ms; 50; 250; Determine the frequency f and angular frequency ω.


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

QUESTIONS №14

1. 
   Asynchronous motors:
   

(Structure, principle of operation, short-circuited, phase rotor asynchronous motors, single-phase, three-phase, power, useful work coefficient, rotation speed, adjustment methods)

2. 
   A 15  resistor, a 12  resistor and a 35  resistor are connected in series across a potential difference of 120 V. Draw the circuit diagram. Calculate the voltage drop across the 15  resistor.
   
3. 
   C
   omplete the table of values for this circuit:
   

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

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QUESTIONS №14

1. 
   State all Krichoff's law of voltage and current write the formula
   
2. 
   Three resistors, whose values are 35 , 45 , and 85 , are connected in parallel across a 35 V battery. What is the current through the 85  resistor? Draw the circuit diagram
   
3. 
   Complete the table of values for this circuit: