Define: i) Input Offset Voltage ii) Input offset Current iii) Input Bias Current iv) Output offset voltage
Last Answer : Definition of parameters of OPAMP is follows: i) Input Offset Voltage: Input offset voltage is defined as the voltage that must be applied between the two input terminals of an OPAMP to null or ... to ground) and output voltage is obtained non zero such voltage is output offset voltage of opamp.
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686 views
1 answer
asked
May 2, 2020
by
anonymous

Define current. State its unit.
Last Answer : Electric current: It is a measure of the amount of electrical charge transferred per unit time. It represents the flow of electrons through a conductive material, such as a metal wire. Unit: 1 coulomb/second. OR Its unit is ampere represented by A
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89 views
1 answer
asked
Jul 26, 2019
by
anonymous

Define: 1) voltage ratio, 2) current ratio, 3) transformation ratio of transformer.
Last Answer : 1) Voltage ratio: The voltages in primary and secondary winding is proportional to number of turns in primary and secondary respectively. So, the voltage ratio is same as transformation ratio. V2/V1 = N2 ... as transformation ratio of transformer. It is denoted by K. K = N2/N1
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2.7k views
1 answer
asked
Aug 12, 2018
by
anonymous

Direct Current (DC) Next Topic : Alternating current (AC)
Last Answer : Direct Current (DC) is the unidirectional electric current. Uni meaning is one. And the flow of charge in same direction. We know that conventional current flow from positive terminal of battery to ... The magnitude of DC may constant or vary but direction do not change with respect to time.
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222 views
3 answers
asked
Nov 22, 2019
by
anonymous

Alternating current (AC)
Last Answer : AC stands for Alternating Current meaning voltage or current that changes polarity or direction respectively over time. An Alternating Current (AC) is an electric current whose magnitude ... energy are known as alternators and are simpler construction than DC electromechanical generators.
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185 views
2 answers
asked
Nov 22, 2019
by
anonymous

Does current flow through a capacitor ?
Last Answer : Imagine a pipe with a flexible diaphram in the middle separating two haves of the pipe. Now the pipe is filled with air. If you apply a pressure to one end the diaphram will deform ... capacitor, the effects on electrons will be recreated across the boundary. But theres no electrical connection...
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103 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
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149 views
3 answers
asked
Aug 25, 2019
by
anonymous

A charge of 0.1 C moves past a given point every 0.01 s. How much is the current?
Last Answer : The current is 10.0A. 1ampere = 1 Coulomb per 1 second. 0.1Coulombs ÷ 0.01seconds = 10.0amperes.
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415 views
1 answer
asked
Jul 1, 2019
by
anonymous

Describe the difference between direct and alternating current.
Last Answer : Direct current is the flow of electricity or charge in one direction.. Alternative current is the flow of charge that doesn't flow in one direction.
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5.3k views
4 answers
asked
Jun 29, 2019
by
anonymous

Explain why potential difference is necessary to produce current in a circuit.
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99 views
0 answers
asked
Jun 29, 2019
by
anonymous

Kirchhoff's Current Law
Last Answer : Kirchhoff's current law
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2.6k views
1 answer
asked
Jun 11, 2019
by
anonymous

Current ratio
Last Answer : Current ratio
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71 views
1 answer
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Jun 11, 2019
by
anonymous

Current divider rule
Last Answer : Current divider rule
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2.5k views
1 answer
asked
Jun 11, 2019
by
anonymous
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Current formula
Last Answer : Current formula
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76 views
1 answer
asked
Jun 11, 2019
by
anonymous

Capacitive current
Last Answer : Capacitive current formula
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77 views
1 answer
asked
Jun 11, 2019
by
anonymous

How to find total impedance Z, current I and Impedance angle ?
Last Answer : How to find total impedance Z, current I and Impedance angle ?
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165 views
2 answers
asked
May 30, 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
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113 views
1 answer
asked
May 24, 2019
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.
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141 views
1 answer
asked
Sep 7, 2018
by
anonymous

List out any four effects of electric current used in measuring instruments & write name of meter working on it.
Last Answer : Effects of Electric Current used in measuring instruments: 1. Magnetic Effect: PMMC and Moving Iron type Ammeters, voltmeter and Dynamometer type wattmeters etc. 2. Electromagnetic induction ... . Electrostatic effect: Voltmeters. 5. Hall Effect: Flux meter, Poynting vector wattmeter.
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1.0k views
1 answer
asked
Sep 6, 2018
by
anonymous

State various effects of electric current and explain any one.
Last Answer : Effects of Electric Current: 1. Magnetic Effect: When a current is passed through a conductor, magnetic field is produced round the conductor. Due to this field when current carrying ... The rise in temperature is converted into elongation of hot wire element causes displacement of pointer.
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121 views
2 answers
asked
Sep 4, 2018
by
anonymous

In a series R-C circuit, with the increase in frequency, current (A) Reduces (B) Increases (C) Does not change (D) Becomes zero
Last Answer : In a series R-C circuit, with the increase in frequency, current Increases
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111 views
1 answer
asked
May 8, 2018
by
anonymous

A 1000Ohm, 1 Watt resistor can safely pass a current of
Last Answer : A 1000 Ohm, 1 Watt resistor can safely pass a current of 30 mA
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463 views
1 answer
asked
May 8, 2018
by
anonymous
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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
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126 views
1 answer
asked
May 8, 2018
by
anonymous

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
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262 views
1 answer
asked
May 8, 2018
by
anonymous

For a round wire, the approximate value of fusing current is given by
Last Answer : For a round wire, the approximate value of fusing current is given by K√d3
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238 views
1 answer
asked
May 3, 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
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121 views
1 answer
asked
Apr 30, 2018
by
anonymous
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Which of the following can reduce the Eddy current losses? A) By making the core of a stack of plates electrically insulated from each other B) By making the core of solid block C) By increasing the applied voltage D) None of these
Last Answer : Which of the following can reduce the Eddy current losses? A) By making the core of a stack of plates electrically insulated from each other B) By making the core of solid block C) By increasing the applied voltage D) None of these
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91 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
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121 views
1 answer
asked
Apr 29, 2018
by
anonymous

The current flow in a battery is due to ______ A) movement of ions B) movement of protons C) movement of holes D) movement of neutrons
Last Answer : The current flow in a battery is due to movement of ions
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105 views
1 answer
asked
Apr 29, 2018
by
anonymous

A ferrite core has less eddy current loss than an iron core because?
Last Answer : A ferrite core has less eddy current loss than an iron core because ferrites have high hysteresis.
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382 views
1 answer
asked
Mar 25, 2018
by
anonymous

The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is_______Vs.
Last Answer : The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is 20 Vs
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271 views
1 answer
asked
Mar 25, 2018
by
anonymous

When an alternating current passes through an ohmic resistance the electrical power converted into heat is?
Last Answer : When an alternating current passes through an ohmic resistance the electrical power converted into heat is true power.
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966 views
1 answer
asked
Mar 25, 2018
by
anonymous

The equation of 50 Hz current sine wave having r.m.s. value of 60 A is?
Last Answer : (60*√2)Sin(2π*50*t)
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1.1k views
2 answers
asked
Mar 25, 2018
by
anonymous

The frequency of an alternating current is?
Last Answer : The frequency of an alternating current is the number of waves passing through a point in one second.
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102 views
1 answer
asked
Mar 25, 2018
by
anonymous

Magnitude of current at resonance in R-L-C circuit?
Last Answer : The current will be maximum if it is a series rlc circuit.
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286 views
2 answers
asked
Mar 25, 2018
by
anonymous

In the case of an unsymmetrical alternating current the average value must always be taken over?
Last Answer : In the case of an unsymmetrical alternating current the average value must always be taken over the whole cycle.
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271 views
1 answer
asked
Mar 25, 2018
by
anonymous

In a loss-free R-L-C circuit the transient current is?
Last Answer : In a loss-free R-L-C circuit the transient current is sinusoidal.
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408 views
1 answer
asked
Mar 25, 2018
by
anonymous

Inductance affects the direct current flow?
Last Answer : Inductance affects the direct current flow at the time of turning on and off.
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138 views
1 answer
asked
Mar 25, 2018
by
anonymous

The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.
Last Answer : 45
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838 views
2 answers
asked
Mar 24, 2018
by
anonymous

Why does induction motor have high starting current?
Last Answer : In induction motor , the flux produce is quadrature to the applied voltage. Since when we are going to start motor , there is no flux present inside . So in order to lets say compensate it ... times of current to further increase flux. So that is reason for high starting current in induction motor
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143 views
2 answers
asked
Mar 15, 2018
by
anonymous

What is the relationship between power and current?
Last Answer : P = I2R Where P = power I = Current R = Resistance This the relationship between current and power.
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104 views
2 answers
asked
Mar 15, 2018
by
anonymous

What happens to the resistance when the current increases?
Last Answer : Resistance reduces when current increases.
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104 views
1 answer
asked
Mar 15, 2018
by
anonymous

How eddy current can be minimized?
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72 views
0 answers
asked
Mar 15, 2018
by
anonymous

What is the difference between eddy current and hysteresis loss?
Last Answer : Loss occurred by magnetising and demagnetising process is called histerisis loss and the current flowed due to the magnetic field produced by the electric field applied is called eddy current losses
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3.0k views
1 answer
asked
Mar 15, 2018
by
anonymous

How eddy current is produced in a transformer?
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126 views
0 answers
asked
Mar 15, 2018
by
anonymous
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Do cell phones use AC or DC current?
Last Answer : DC of course.
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210 views
2 answers
asked
Mar 14, 2018
by
anonymous

Can you make alternating current through a battery?
Last Answer : Yes, we can make AC through a battery using an inverter.
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102 views
1 answer
asked
Mar 14, 2018
by
anonymous

What happens when a current flows through a wire?
Last Answer : Current can produce two effect one is heating effect and second is magnetic effect.
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126 views
2 answers
asked
Mar 14, 2018
by
anonymous

Is current from a battery AC or DC?
Last Answer : The current from the battery is DC
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135 views
2 answers
asked
Mar 14, 2018
by
anonymous

How does AC current change direction?
Last Answer : This is because the angle at which the magnetic fields cuts across a winding changes its poles thus current has to change dirention .
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92 views
1 answer
asked
Mar 14, 2018
by
anonymous
