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A high-Q tuned circuit in an amplifier permits to have high

Recent questions tagged voltage

1 answer 29 views

Is the power line voltage available in our homes a dc or an ac voltage?

asked Jun 29 by Shimroz123
1 answer 43 views

Voltage ratio

asked Jun 11 by Shimroz123
1 answer 34 views

Voltage divider rule

asked Jun 11 by Shimroz123
1 answer 23 views

Voltage formula

asked Jun 11 by Shimroz123
1 answer 16 views

Self induced voltage across an inductance

asked Jun 11 by Shimroz123
1 answer 15 views

Kirchhoff's voltage law

asked Jun 11 by Shimroz123
1 answer 16 views

Instantaneous value of a sine wave voltage

asked Jun 11 by Shimroz123
1 answer 12 views

Faraday's law of induced voltage

asked Jun 11 by Shimroz123
1 answer 56 views

Why inductor current lags inductor voltage ?

asked May 24 by Shimroz123
1 answer 17 views

Explain how sinusoidal AC voltage is generated by using simple one loop generator.

asked Sep 7, 2018 by Shimroz123
1 answer 7 views

Explain lagging quantity and leading quantity, explain this concept with voltage and current waveform

asked Sep 7, 2018 by Shimroz123
1 answer 32 views

Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.

asked Sep 5, 2018 by Shimroz123
1 answer 8 views

Define pinch off voltage and drain resistance of FET.

asked Sep 5, 2018 by Shimroz123
1 answer 11 views

Define Depletion region and Barrier voltage of PN junction.

asked Sep 5, 2018 by Shimroz123
1 answer 14 views

State the concept of internal voltage drop.

asked Sep 4, 2018 by Shimroz123
1 answer 10 views

Define : (i) Dielectric strength (ii) Breakdown voltage

asked Sep 4, 2018 by Shimroz123
2 answers 65 views

What is internal voltage drop and terminal voltage?

asked Sep 4, 2018 by Shimroz123
1 answer 67 views

Define: 1) voltage ratio, 2) current ratio, 3) transformation ratio of transformer.

asked Aug 12, 2018 in Basic electrical and electronics engineering by Quiz
0 answers 45 views

For a balanced three phase star connected load for which line voltage is 230V and per phase resistance and reactance is 6 Ohm and 8 Ohm respectively. Calculate: 1) phase voltage 2) line current 3) power factor 4) total power absorbed

asked Aug 12, 2018 in Basic electrical and electronics engineering by Quiz
0 answers 28 views

Draw the Delta connected three phase system showing all the voltages and currents. Write the power equation.

asked Aug 11, 2018 in Basic electrical and electronics engineering by Quiz
2 answers 50 views

Write the relation between phase and line current, phase and line voltage for Star connection.

asked Aug 11, 2018 in Basic electrical and electronics engineering by Quiz
0 answers 50 views

What is line voltage and phase voltage? Draw balanced three phase star connected system. Show all the voltages and currents.

asked Aug 11, 2018 in Basic electrical and electronics engineering by Quiz
1 answer 58 views
1 answer 73 views

 An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when A) ZL = R B) ZL = jXS C) ZL = R-jXS D) ZL = R+jXS 

asked Jun 18, 2018 in Electrical Engineering by Shimroz123
1 answer 33 views

An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak Envelope Power? A) 49.98 W B) 79.98 W C) 99.96 W D) 199.93 W

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
0 answers 94 views

The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of A) 10 kHz B) 10 Hz C) 5 kHz D) 5 Hz 

asked Jun 18, 2018 in Power Electronics by Shimroz123
1 answer 27 views

A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is the required value of series resistance with source? A) 5.45 Ω B) 6 Ω C) 7.2 Ω D) 6.38 Ω  

asked Jun 18, 2018 in Diode by Shimroz123
1 answer 18 views

A diode in which the change in reverse bias voltage varies the capacitance is called as A) Varactor diode B) Switching diode C) Tunnel diode D) Zener-diode  

asked Jun 18, 2018 in Diode by Shimroz123
1 answer 23 views

Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 19 views

Two transformers A and B having equal outputs and voltage ratios but unequal percentage impedances of 4 and 2 are operating in parallel. The transformer A will be overloaded by 

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 20 views

A change of 4% in the supply voltage to an induction motor will produce a change of approximately

asked May 8, 2018 in Electrical Machine by Shimroz123
1 answer 23 views

The voltage of transmission can be regulated by  (A) Use of tap changing transformers (B) Switching in shunt capacitors at the receiving end during heavy loads (C) Use of capacitors to neutralize the effect of series reactance (D) Any of the above methods

asked May 8, 2018 in Switchgear And Protection by Zeeshan
1 answer 23 views

The permissible voltage variation in transmission and distribution system is:  (A) ± 0.1% (B) ± 1% (C) ±10% (D) ± 25%

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 36 views

Step-down transformer converts high voltage and low current into:  (A) How voltage and high current (B) High voltage and low current (C) Low voltage and high current (D) None of the above

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 22 views

The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be :  (A) 34.64 kVA (B) 75 kVA (C) 20 kVA (D) None of the above

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 19 views

Which of the following is the least expensive protection for over current in low voltage system?  (A) Rewireable fuse (B) Isolator (C) Oil Circuit breaker (D) Air break circuit breaker

asked May 8, 2018 in Electrical Engineering by Zeeshan
1 answer 51 views

If 3000 kW power is to be transmitted over a distance of 30 km, the desirable transmission voltage will be.  (A) 11 kV (B) 33 kV (C) 66 kV (D) 132 kV

asked May 8, 2018 in Electric Power Transmission by Shimroz123
1 answer 30 views

The voltage gains of the amplifier with and without feedback are 20 and 100 respectively. The percentage of negative feedback would be

asked May 3, 2018 in Power Electronics by Shimroz123
1 answer 34 views

An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of the amplifier with feedback is  (1) 141 (2) 92.3 (3) 9.23 (4) 1.41

asked May 1, 2018 in Power Electronics by Shimroz123
1 answer 38 views

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque  (1) Decreases (2) Increases (3) Remains constant (4) None of the above

asked May 1, 2018 in Electrical Machine by Shimroz123
1 answer 72 views

The voltage gain of a common -source JFET amplifier depends up on its  (1) Input impedance (2) Amplification factor (3) Dynamic drain resistance (4) Drain load resistance

asked Apr 30, 2018 in Power Electronics by Shimroz123
1 answer 27 views

A transformer has negative voltage regulation when its load power factor is   (1) Zero (2) Unity (3) Leading (4) Lagging

asked Apr 30, 2018 in Power system by Shimroz123
1 answer 39 views

A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would  (1) increase progressively  (2) decrease progressively  (3) decrease to a minimum value at α = 0.5 and then increase  (4) increase to a maximum value at α = 0.5 and then decrease

asked Apr 30, 2018 in Power Electronics by Shimroz123
1 answer 70 views

A voltage source inverter will have better performance if its  (1) load inductance is small and source inductance is large.  (2) both load and source inductance are small.  (3) both load and source inductances are large.  (4) load inductance is large and source inductance is small. 

asked Apr 30, 2018 in Power Electronics by Shimroz123
1 answer 79 views

A 3-phase voltage source inverter operates in 180° conduction mode with a star connected resistive load. If input dc voltage is 100 V, then the peak to peak output line voltage is :

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 26 views

A current controlled voltage source is equivalent to :  (A) series voltage feed -back amplifier (B) shunt current feed -back amplifier (C) shunt voltage feed -back amplifier (D) series current feed -back amplifier

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 9 views

Identify the increasing order of voltage regulation of the following dc generators a same load :  (A) differential compound, shunt and under compound  (B) shunt, differential compound and under compound  (C) under compound, shunt and differential compound  (D) shunt, under compound and differential compound

asked Apr 30, 2018 in Electrical Machine by Shimroz123
1 answer 14 views

The arc voltage in a circuit breaker is :

asked Apr 29, 2018 in Utilization of electrical energy by Shimroz123
1 answer 94 views

A voltage source inverter is normally employed when  (1) source inductance is large and load inductance is small (2) source inductance is small and load inductance is large (3) both source and load inductance are small (4) both source and load inductance are large

asked Apr 29, 2018 in Power Electronics by Shimroz123
1 answer 69 views

A single-phase voltage source square -wave inverter feeds pure inductive load. The waveform of the load current will be

asked Apr 29, 2018 in Power Electronics by Shimroz123

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