What is terminal voltage ?
Show More
78 views
0 answers
asked
Jan 24, 2020
by
anonymous

Limitation and application of High Voltage DC (HVDC)
Last Answer : Limitation and application of High Voltage DC (HVDC) : Limitation:- 1) It is difficult to step up and step down DC voltage like AC voltage. 2) Special cooling ... conventional/non-conventional) 12) Increasing existing grid utilization. 13) Interconnection of different grids or networks
Show More
111 views
1 answer
asked
Aug 25, 2019
by
anonymous

State standard voltage in India for the following : (i) Generation Voltage (ii) Primary Transmission Voltage
Last Answer : i. Generation Voltage : 3.3KV, 6.6KV,11KV and 17.5 KV ii. Primary Transmission voltage :- 220 KV, 400KV, 765 KV (750 KV)
Show More
94 views
1 answer
asked
Aug 25, 2019
by
anonymous

What kills, current or voltage?
Last Answer : Current would kill. You can actually have thousands of bolts going through you and not even know it. Yes you probably know already voltage is current times resistance. Since your body is a resistor it would take just a small amount of current to create a very high voltage
Show More
149 views
3 answers
asked
Aug 25, 2019
by
anonymous

Define: i) Knee voltage ii) Reverse saturation current
Last Answer : i) Knee voltage : The applied forward voltage, at which the PN junction starts conducting and current starts increasing exponentially is called knee voltage. It is 0.7V for Si and 0. ... semiconductor diode caused by diffusion of minority carriers from the neutral regions to the depletion region.
Show More
155 views
1 answer
asked
Aug 19, 2019
by
anonymous

If 1-phase voltage is 220V, why is 3-phase 440V and not 660V ?
Last Answer : Phase voltage =220v /( phase to neutral) Line voltage = 380 v ( phase to phase) Phase angle difference 120° So when two phases reach vmax +ve I.e. (+220v) + (+220v) = 440v that time due ... these event happen very fast. Hence we have 440 v only in three phase motor. √3.phase voltage= 380 v.
Show More
372 views
4 answers
asked
Aug 19, 2019
by
anonymous

Is the power line voltage available in our homes a dc or an ac voltage?
Last Answer : The power line voltage available in our homes is AC. Mobile dwellings are the most commonly DC-supplied homes and even then they tend to include AC supply for heavier loads.
Show More
5.2k views
1 answer
asked
Jun 29, 2019
by
anonymous

Voltage ratio
Last Answer : Voltage ratio
Show More
111 views
1 answer
asked
Jun 11, 2019
by
anonymous

Voltage divider rule
Last Answer : Voltage divider rule
Show More
114 views
1 answer
asked
Jun 11, 2019
by
anonymous

Voltage formula
Last Answer : Voltage formula
Show More
86 views
1 answer
asked
Jun 11, 2019
by
anonymous

Self induced voltage across an inductance
Last Answer : Self induced voltage across an inductance
Show More
134 views
1 answer
asked
Jun 11, 2019
by
anonymous

Kirchhoff's Voltage Law
Last Answer : Kirchhoff's voltage law
Show More
84 views
1 answer
asked
Jun 11, 2019
by
anonymous

Instantaneous value of a sine wave voltage
Last Answer : Instantaneous value of a sine wave voltage
Show More
173 views
1 answer
asked
Jun 11, 2019
by
anonymous

Faraday's law of induced voltage
Last Answer : Faraday's law of induced voltage
Show More
106 views
1 answer
asked
Jun 11, 2019
by
anonymous

Why inductor current lags inductor voltage ?
Last Answer : Inductor is a wire wounding structure having a core material it induces emf which is opposite to the voltage supply and proportional to rate of change of current so current lags the voltage in inductor
Show More
112 views
1 answer
asked
May 24, 2019
by
anonymous

Explain how sinusoidal AC voltage is generated by using simple one loop generator.
Last Answer : An electric current produced by means of electrical machine is known as generator which converts mechanical energy into electrical energy. When conductor cuts the magnetic flux, emf induced in it. (Faraday' ... upon position of armature. The nature of emf is alternating as shown by the waveform.
Show More
1.4k views
1 answer
asked
Sep 7, 2018
by
anonymous

Explain lagging quantity and leading quantity, explain this concept with voltage and current waveform
Last Answer : When two alternating quantities attain their respective zero or peak values simultaneously, the quantities are said to be in-phase quantities. When the quantities do not attain their respective zero or ... current is leading the voltage or the voltage is said to be lagging behind the current.
Show More
139 views
1 answer
asked
Sep 7, 2018
by
anonymous

Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.
Last Answer : Two advantages of voltage divider biasing of BJT. 1. It is very simple method of transistor biasing. 2. The biasing conditions can be very easily set. 3. there is no loading of ... 5. The resistor RE introduces a negative feedback. So all the advantages of negative feedback are obtained.
Show More
776 views
1 answer
asked
Sep 5, 2018
by
anonymous

Define pinch off voltage and drain resistance of FET.
Last Answer : 1 . Pinch-off Voltage: It is the value of the drain to source voltage VDS at which the drain current ID reaches its constant saturation value. Any further increase in VDS does not have any ... drain to source voltage to the change in drain current. It is also called AC/dynamic drain resistance.
Show More
120 views
1 answer
asked
Sep 5, 2018
by
anonymous

Define Depletion region and Barrier voltage of PN junction.
Last Answer : 1. Depletion region : The region consisting of immobile positive charge at n-side and immobile negative charge at p-side near the junction acts like a barrier and prevents the further flow of ... charge formed at the p-n junction is called barrier voltage, barrier potential or junction barrier.
Show More
116 views
1 answer
asked
Sep 5, 2018
by
anonymous
.jpg)
State the concept of internal voltage drop.
Last Answer : Concept of internal voltage drop: Every practical source offers some opposition to the current due to its internal parts or components. e.g. a 12V battery has electrodes made up of conducting ... internal voltage drop, the terminal voltage of practical voltage source is always less than its emf.
Show More
243 views
1 answer
asked
Sep 4, 2018
by
anonymous

Define : (i) Dielectric strength (ii) Breakdown voltage
Last Answer : (i) Dielectric strength: The voltage which a dielectric material can withstand without breaking down (without losing its dielectric property) is called its dielectric strength. It is represented by kV/mm ... or is no longer an insulator) for a specified thickness, is its breakdown voltage.
Show More
109 views
1 answer
asked
Sep 4, 2018
by
anonymous

What is internal voltage drop and terminal voltage?
Last Answer : It is not permissible to just connect the positive terminal to the negative terminal of a cell with a copper wire. It will overheat and get damaged. This happens because the electromotive force (emf) ... than the nominal voltage (emf) of the cell and this lower voltage is called terminal voltage.
Show More
167 views
2 answers
asked
Sep 4, 2018
by
anonymous

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
Last Answer : An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when ZL = R-jXS
Show More
4.0k views
1 answer
asked
Jun 18, 2018
by
anonymous

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
Last Answer : 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
Show More
578 views
1 answer
asked
May 8, 2018
by
anonymous

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
Last Answer : 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 33%
Show More
671 views
1 answer
asked
May 8, 2018
by
anonymous

The permissible voltage variation in transmission and distribution system is: (A) ± 0.1% (B) ± 1% (C) ±10% (D) ± 25%
Last Answer : The permissible voltage variation in transmission and distribution system is: ±10%
Show More
481 views
1 answer
asked
May 8, 2018
by
anonymous

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
Last Answer : Step-down transformer converts high voltage and low current into: Low voltage and high current
Show More
123 views
1 answer
asked
May 8, 2018
by
anonymous

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
Last Answer : The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be : 34.64 kVA
Show More
199 views
1 answer
asked
May 8, 2018
by
anonymous
.jpg)
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
Last Answer : 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
Show More
260 views
1 answer
asked
May 8, 2018
by
anonymous

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 :
Last Answer : 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 : 200 V
Show More
205 views
1 answer
asked
Apr 30, 2018
by
anonymous

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
Last Answer : A current controlled voltage source is equivalent to : shunt voltage feed -back amplifier
Show More
119 views
1 answer
asked
Apr 30, 2018
by
anonymous

In which of the following waveforms is RMS voltage equal to the average voltage? A) Triangle wave B) Square wave C) Sine wave D) None of these
Last Answer : In which of the following waveforms is RMS voltage equal to the average voltage? A) Triangle wave B) Square wave C) Sine wave D) None of these
Show More
82 views
1 answer
asked
Apr 29, 2018
by
anonymous

What is a capacitor voltage transformer? A) It is a transformer used in power systems to step up low voltage signals and provide extra high voltage B) It is a transformer used in power systems ... in power systems to step down extra high voltage signals and provide low voltage D) None of these
Last Answer : What is a capacitor voltage transformer? A) It is a transformer used in power systems to step up low voltage signals and provide extra high voltage B) It is a transformer used in power systems ... power systems to step down extra high voltage signals and provide low voltage D) None of these
Show More
99 views
1 answer
asked
Apr 29, 2018
by
anonymous

What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known
Last Answer : What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known
Show More
119 views
1 answer
asked
Apr 29, 2018
by
anonymous

Which of the following cells produces a highly stable voltage? A) Weston cell B) Leclanche cell C) Both A and B D) None of these
Last Answer : Which of the following cells produces a highly stable voltage? A) Weston cell B) Leclanche cell C) Both A and B D) None of these
Show More
116 views
1 answer
asked
Apr 29, 2018
by
anonymous

A network that consists of at least a voltage source or current source is called A) Active network B) Ideal network C) Sourced network D) Outsourced network
Last Answer : A network that consists of at least a voltage source or current source is called Active network
Show More
118 views
1 answer
asked
Apr 29, 2018
by
anonymous

Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero
Last Answer : Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero
Show More
170 views
1 answer
asked
Apr 29, 2018
by
anonymous

What is the RMS voltage in a series RL circuit, if the voltage across R and L is 256 V and 192 V respectively? A) 320 V B) 448 V C) 64 V D) None of these
Last Answer : What is the RMS voltage in a series RL circuit, if the voltage across R and L is 256 V and 192 V respectively? A) 320 V B) 448 V C) 64 V D) None of these
Show More
145 views
1 answer
asked
Apr 29, 2018
by
anonymous

A circuit that binds the upper or lower extreme of a waveform to a fixed DC voltage level is called ______ A) DC voltage restorer B) Clamping circuit C) Both A and B D) None of these
Last Answer : A circuit that binds the upper or lower extreme of a waveform to a fixed DC voltage level is called ______ A) DC voltage restorer B) Clamping circuit C) Both A and B D) None of these
Show More
105 views
1 answer
asked
Apr 29, 2018
by
anonymous

In a battery, the difference between the no-load voltage and the measured voltage output is called ________ A) Internal voltage B) Internal resistance C) External resistance D) All the above
Last Answer : In a battery, the difference between the no-load voltage and the measured voltage output is called Internal resistance
Show More
122 views
1 answer
asked
Apr 29, 2018
by
anonymous

A single core cable is designed to work for a single phase system with a peak voltage of 220 kV. The maximum permissible stress in the dielectric is not to exceed 20 kV/mm. For economical size, the overall core diameter of the cable is (A) 28.2 mm (B) 26.4 mm (C) 24.4 mm (D) 22.0 mm
Last Answer : A single core cable is designed to work for a single phase system with a peak voltage of 220 kV. The maximum permissible stress in the dielectric is not to exceed 20 kV/mm. For economical size, the overall core diameter of the cable is 22.0 mm
Show More
755 views
1 answer
asked
Apr 28, 2018
by
anonymous

At a particular instant, the R-phase voltage of a balanced 3-phase system is + 30 V, and the Y-phase voltage is – 90 V. The voltage of B-phase at that instant is (A) + 120 V (B) – 120 V (C) – 60 V (D) + 60 V
Last Answer : At a particular instant, the R-phase voltage of a balanced 3-phase system is + 30 V, and the Y-phase voltage is – 90 V. The voltage of B-phase at that instant is + 60 V
Show More
108 views
1 answer
asked
Apr 25, 2018
by
anonymous

A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is (A) 300 W (B) 150 W (C) 45 W (D) 20 W
Last Answer : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is 150 W
Show More
289 views
1 answer
asked
Apr 25, 2018
by
anonymous

An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms?
Last Answer : An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms, both resistance and inductance carry equal currents.
Show More
253 views
1 answer
asked
Mar 25, 2018
by
anonymous

what is the minimum voltage required to turn on a diode ?
Last Answer : 0.7 v sil and 0.3 v for gr
Show More
156 views
1 answer
asked
Dec 28, 2017
by
anonymous

Electrical shock happens for voltage/current?
Last Answer : The severity ofelectric shockdepends on thecurrentflowing through the body, which is a function of the electromotive force (E) involts, and the contact resistance (R) in ohms.
Show More
79 views
1 answer
asked
Oct 30, 2017
by
Niloy

If resistance is 8 Ohm and current is 16 ampere then what will be the voltage and power?
Last Answer : 128 volts ,2048 watts
Show More
127 views
2 answers
asked
Oct 21, 2017
by
anonymous

Last Answer : yes High Voltage side of Transformer winding have more number of turns. and low voltage side of Transformer winding have less number of turns.
Show More
156 views
1 answer
asked
Sep 30, 2017
by
anonymous

Last Answer : Unit of voltage is volt denoted by capital V .
Show More
104 views
1 answer
asked
Sep 20, 2017
by
anonymous
