Questions №1 Constant current linear electric circuits

Worked out by: Sharofov S.
Head of “EEE” Department: Usmonov Sh.
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QUESTIONS №3

1. 
   Single-phase alternating current electric circuits:
   

(output, transmission, sinusoidal, 50 , frequency, analytical expression, graphical expression, vector expression, diagram, instantaneous value, period, phase, angular displacement, complex number, abstract value, real value, math operation, irreversible process, advance, lag behind, active, reactive, instantaneous power, field energy)

2. 
   Fill out the table for the circuit diagramed at the right.
   

Circuit Position	Voltage (V)	Current (A)	Resistance (Ω)	Power (W)
1			10.0
2			20.0
3			30.0
Total	6.00

3. 
   An Electric iron is rated 1500W, 220V. Find the current drawn & resistance of the heating element
   

Worked out by: Sharofov S.
Head of “EEE” Department: Usmonov Sh.
QUESTIONS №4

1. 
   Three-phase 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. 
   F ill out the table for the circuit diagramed at the right.
   

Circuit Position	Voltage (V)	Current (A)	Resistance (Ω)
1			10.0
2			20.0
3			30.0
Total	6.00

1. 
   An electric hob with power P = 1500 W is connected to the AC mains with voltage U = 220 V. Determine the current, resistance, and amount of energy consumed by the hob during operation t = 2 hours.
   

Worked out by: Sharofov S.
Head of “EEE” Department: Usmonov Sh.
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QUESTIONS №5

1. 
   Transformers:
   

(transformation, power line, nominal, current, magneto conductor, magnetic flux, electric state, coefficient, magnetic state, operating current, direct operation, external, real, short circuit, diagram, efficiency, three-phase, o measurement, electrical connection)

2. 
   Questions 1 and 2 refer to the following:
   

The diagram to the right represents an electric circuit consisting of four resistors and a 12-volt battery.
1) What is the equivalent resistance of the circuit shown?
2) What is the current measured by ammeter A shown in the diagram?

3. 
   The angular frequency of an alternating current ω= 3140; 942; 12560; 5024; 94200; If 10048 • 1 / sec, find the frequency and period of the signal.
   

Worked out by: Sharofov S.
Head of “EEE” Department: Usmonov Sh.
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QUESTIONS №6

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. 
   Two resistances, one 62  and the other 88 , are connected in parallel. The resistors are then connected to a 12-V battery.
   

a. What is the equivalent resistance of the parallel combination?
b. What is the current through each resistor?

3. 
   An electric hob with power R = 500 W is connected to the AC mains with voltage U = 220 V. Determine the current, resistance, and amount of energy consumed by the hob during operation t = 4 hours.