What is the relationship between power and resistance?
Last Answer : P = I2R Where P = power I = Current R = Resistance
Show More
71 views
2 answers
asked
Mar 15, 2018
by
anonymous

What is the mathematical relationship between resistance and conductance?
Show More
96 views
0 answers
asked
Jun 29, 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.
Show More
5.3k views
4 answers
asked
Jun 29, 2019
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
Show More
3.0k views
1 answer
asked
Mar 15, 2018
by
anonymous
.jpg)
ln HRC fuse the time between cut-off and final current zero is called
Last Answer : ln HRC fuse the time between cut-off and final current zero is called the arcing time
Show More
139 views
1 answer
asked
Apr 26, 2018
by
anonymous

What is the difference between line and phase current?
Last Answer : The currents flows through phase lines is called line voltage and currents flows from phase to neutral line is called phase current
Show More
131 views
1 answer
asked
Mar 10, 2018
by
anonymous

Give the circuit analysis of current source inverter with resistive load. What are the main difference between voltage source inverter and current source inverter?
Last Answer : Current source inverter (CSI): In current source inverter, the output current is independent of load. The input current of current source inverter is constant. Current source converter converts DC input current to ... are connected in parallel. In CSI diodes are connected in series.
Show More
394 views
1 answer
asked
Feb 18, 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.
Show More
964 views
1 answer
asked
Mar 25, 2018
by
anonymous

Last Answer : In a single phase power factor meter the phase difference between the currents in the two pressure coils is exactly 90°.
Show More
352 views
1 answer
asked
Mar 21, 2018
by
anonymous

Last Answer : The inductive interference between power and communication line can be minimized by transposition of the power line, transposition of the communication line.
Show More
175 views
1 answer
asked
Mar 20, 2018
by
anonymous

A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is
Last Answer : Please show the solution for this question
Show More
515 views
2 answers
asked
Apr 29, 2018
by
anonymous

Last Answer : In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be more than full-load current.
Show More
366 views
1 answer
asked
Mar 20, 2018
by
anonymous

About trnsformer
Last Answer : Acc to Ohms law V=IR but it is only applicable when our resistance R is constant, as in case of transformer we take impedence which is equivalent to resistance is not constant it varies with system parameters that why Ohms law not applicable in case of transformer
Show More
120 views
1 answer

Draw the Delta connected three phase system showing all the voltages and currents. Write the power equation.
Show More
93 views
0 answers
asked
Aug 11, 2018
by
anonymous

what is the difference between AC and DC current ?
Last Answer : AC is generated using Alternator. DC is generated using DC generator. AC changes its direction periodically. DC do not change its direction periodically. AC have non zero frequency. DC have zero ... Power factor of AC is between 0 and 1. But power factor of DC is always 1.
Show More
153 views
1 answer

What's the difference between electronic and electrical
Show More
88 views
0 answers
asked
Jan 21, 2020
by
Sampson

What is the difference between a cable and a conductor?
Show More
109 views
0 answers
asked
Aug 12, 2019
by
anonymous

Describe the difference between an open circuit and a short circuit.
Last Answer : Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit
Show More
7.8k views
3 answers
asked
Jun 29, 2019
by
anonymous

Write any four differences between CT and PT.
Last Answer : CT PT CT corresponds to current transformer PT corresponds to potential transformer CT primary is connected in series with load and secondary winding is connected to a low range ammeter. PT ... ) x PT ratio It is a step-up transformer. It is a step-down transformer
Show More
70 views
1 answer
asked
Sep 6, 2018
by
anonymous

Write difference between absolute & secondary instrument.
Last Answer : Absolute Instrument Secondary Instrument 1. These give magnitude of quantity in terms physical constants of instruments 1. These give reading directly of the quantity at the time of ... Raleigh current balance. 6. Examples - ammeter, voltmeter, amperehour meter, wattmeter etc.
Show More
6.1k views
1 answer
asked
Sep 5, 2018
by
anonymous

Differentiate between positive and negative feedback.
Last Answer : PARAMETER POSITIVE FEEDBACK NEGATIVE FEEDBACK Overall phase shift 0° or 360° 180° Feedback and input signal Are in phase Are out of phase Input signal ... Increases Input impedance Decreases Increases Output impedance Increases Decreases
Show More
159 views
1 answer
asked
Sep 5, 2018
by
anonymous

Define α & β and derive the relation between (α) &) (β) of transistor.
Last Answer : α : The ratio of output collector current IC to input emitter current IE in the CB configuration is called current gain alpha (α). β : The ratio of output collector current IC to the input base current IB in the CE configuration is ... ( 1/β) + 1 hence 1/ α = (1+β )/ β Therefore, α = β /(1+β)
Show More
123 views
1 answer
asked
Sep 5, 2018
by
anonymous

Compare between CB , CE & CC transistor configuration.
Last Answer : Parameter CB CE CC I/P impedance Low Or 50Ω Medium Or 600Ωto 4kΩ High Or 1 MΩ Current Gain Less than or equal to 1 High Highest Voltage Gain Medium Medium Less ... k Ω to 50 k Ω Low Or 50 Ω Phase shift between input and output 0° 360° 0°
Show More
111 views
1 answer
asked
Sep 4, 2018
by
anonymous

Distinguish between AC and DC.
Last Answer : Particulars Direct Current Alternating Current Definition It is the current whose magnitude and direction do not change with respect to time. It is the current whose ... system, electroplating, Battery charging, Traction. AC machines, Domestic and industrial supply.
Show More
462 views
2 answers
asked
Aug 8, 2018
by
anonymous

Two waves of the same frequency have opposite phase when the phase angle between them is?
Last Answer : Two waves of the same frequency have opposite phase when the phase angle between them is 180°.
Show More
773 views
1 answer
asked
Mar 24, 2018
by
anonymous

What is the difference between an anode and a cathode?
Last Answer : The anode is positively charged electrode and the cathode is negatively charged electrode.
Show More
128 views
1 answer
asked
Mar 14, 2018
by
anonymous

What is the difference between a coil and an inductor?
Last Answer : Inductor is covering with insulating material is called coil.so they differentiate between coil and inductor.
Show More
110 views
1 answer
asked
Dec 16, 2017
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.
Show More
220 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.
Show More
181 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...
Show More
102 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

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.
Show More
414 views
1 answer
asked
Jul 1, 2019
by
anonymous

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

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

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

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

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

Capacitive current
Last Answer : Capacitive current formula
Show More
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 ?
Show More
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
Show More
112 views
1 answer
asked
May 24, 2019
by
anonymous
.jpg)
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

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.
Show More
996 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.
Show More
115 views
2 answers
asked
Sep 4, 2018
by
anonymous
.jpg)
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
Show More
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
Show More
457 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

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

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
Show More
194 views
1 answer
asked
May 3, 2018
by
anonymous
.jpg)
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

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
Show More
90 views
1 answer
asked
Apr 29, 2018
by
anonymous
