P = I^{2}R

Where P = power

I = Current

R = Resistance

What is the mathematical relationship between resistance and conductance?

What is the relationship between power and current? Answer : P = I2R Where P = power I = Current R = Resistance This the relationship between current and power. ...

In a transformer the resistance between its primary and secondary should be? Answer : In a transformer the resistance between its primary and secondary should be infinity. ...

When an alternating current passes through an ohmic resistance the electrical power converted into h Answer : When an alternating current passes through an ohmic resistance the electrical power converted into heat isÂ true power. ...

Answer : In a single phase power factor meter the phase difference between the currents in the two pressure coils isÂ exactly 90Â°. ...

Answer : The inductive interference between power and communication line can be minimized byÂ transposition of the power line,Â transposition of the communication line. ...

For maximum transfer of power, internal resistance of the source should be? Answer : For maximum transfer of power, internal resistance of the source should beÂ equal to load resistance. ...

When resistance element of a heater fuses and then we reconnect it after removing a portion of it, t Answer : When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater willÂ increase. ...

Consider a cube of material of sides 1 cm with a resistance of 0.003 Î© between its opposite faces. W Answer : Consider a cube of material of sides 1 cm with a resistance of 0.003 Î© between its opposite faces. What is the resistance if the same volume of the material is drawn into a length of 50 cm with a uniform cross â€“ section? A) 0.003 Î© B) 0.15 Î© C) 7.5 Î© D) None of these ...

Answer : The terms "electronic" and "electrical" are often used interchangeably, but they refer to different concepts: 1. **Electrical**: This generally pertains to the flow of electricity through conductors. It deals with the generation, distribution, and use of electrical power. Electrical systems include...

What is the difference between a cable and a conductor?

Describe the difference between direct and alternating current. Answer : Direct current is the flow of electricity or charge in one direction..Â Alternative current is the flow of charge that doesn't flow in one direction.Â ...

Describe the difference between an open circuit and a short circuit. 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...

Write any four differences between CT and PT. 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 primary is connected in parallel with high voltage of load and secondary winding is connect...

Write difference between absolute & secondary instrument. 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 measurement.Â 2. Calibration is not required. 2. Calibration with absolute instruments is required ...

Differentiate between positive and negative feedback. Answer : PARAMETER POSITIVE FEEDBACK NEGATIVE FEEDBACK Overall phase shift 0Â° or 360Â° 180Â° Feedback and inputÂ signal Are in phase Are out of phase Input signal Increases due to feedback Decreases due to feedback Output signal Increases due to feedback Decreases due to...

Define Î± & Î˛ and derive the relation between (Î±) &) (Î˛) of transistor. Answer : Î± : The ratio of output collector current IC to input emitter current IE in the CB configuration is called current gain alpha (Î±).Â Î˛ : The ratio of output collector current IC to the input base current IB in the CE configuration is called current gain beta (Î˛) .Â Relationship between Î± and Î˛:Â Â ...

Compare between CB , CE & CC transistor configuration. Answer : Parameter CB CE CC I/P impedance Low Or 50â„¦ Medium Or 600â„¦to 4kâ„¦ High Or 1 Mâ„¦ Current Gain Less than or equal to 1 High Highest Voltage Gain Medium Medium Less than or equal to 1 Output Impedance High Or 50 k â„¦ Medium Or 10 k â„¦ to 50 k â„¦ Low Or 50 â„¦...

Distinguish between AC and DC. 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 magnitude and direction continuously changes with respect to time. Use of transformer Not possible Possible ...

Two waves of the same frequency have opposite phase when the phase angle between them is? Answer : Two waves of the same frequency have opposite phase when the phase angle between them isÂ 180Â°. ...

What is the difference between eddy current and hysteresis loss? 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...

What is the difference between an anode and a cathode? Answer : The anode is positively charged electrode and the cathode is negatively charged electrode....

what is the difference between AC and DC current ? 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 frequency. We cannot store AC but we can store DC. Transmission of AC is che...

What is the difference between a coil and an inductor? Answer : Inductor is covering with insulating material is called coil.so they differentiate between coil and inductor....

Compare between Resistance welding and Arc welding on any six points. Answer : Sr.No Parameters Resistance Welding Arc Welding 1 Type of welding Plastic/Pressure/Non-fusion welding Fusion/Non pressure welding 2 Principle of heat developed Heat is developed due to I2R losses where R is the contact resistanceÂ Heat developed due to arc produced in ...

State the procedure for testing of earth pit resistance with necessary diagrams. Answer : Following procedure (Method) for testing of earth pit resistance with necessary diagrams. 1) Earth Tester : i) Three point method ii) Four point method 2) By Potential drop method 3) Water tap method 1) earth resistance measurement for Earth Tester * The earth tester has tw...

what is equivalent resistance when four 4 Ohm resistors are connected in i) series ii) parallel Answer : equivalent resistance ...

Define resistance with its unit. Answer : Resistance is a measure of the degree to which a substance impedes the flow of electric current induced by a voltage.Â Or Resistance is the opposition to current flow in an electrical circuit. Unit is ohm.(â„¦)...

How does the resistance of a conductor compare to that of an insulator? Answer : The resistance of a conductor can be significantly lower than the resistance of an insulator, depending on each material's atomic properties....

Parallel Reactance and Resistance Example 1 Answer : Parallel Reactance and Resistance Example 1 ...

AC Circuits with Resistance but No Reactance Answer : AC Circuits with Resistance but No Reactance AC Circuits with Resistance but No Reactance Series resistances let two resistances R 1 and R 2 are connected in series as shows in figure and there values are 50 ohm and 50 ohm respectively. The AC voltage source is applied. The value of ...

Problems on resistance and resistivity Answer : Problem on resistance and resistivity 1 : https://youtu.be/OqavD7OlZUs Problem on resistance and resistivity 2 : https://youtu.be/0eo8VO8cpwk Problem on resistance and resistivity 3 : https://youtu.be/Ujx4-pwM9-U Problem on resistance and resistivity 4 : https://youtu.be/Boci2bwuVrA Problem on r...

Problem on temperature coefficient of resistance 3 Answer : Problem on temperature coefficient of resistance 3 ...

Problem on temperature coefficient of resistance 2 Answer : Problem on temperature coefficient of resistance 2 ...

Problem on temperature coefficient of resistance 1 Answer : Problem on temperature coefficient of resistance 1 ...

Problem on resistance and resistivity 13 Answer : Problem on resistance and resistivity 13 ...

Problem on resistance and resistivity 12 Answer : Problem on resistance and resistivity 12 ...

Problem on resistance and resistivity 11 Answer : Problem on resistance and resistivity 11 ...

Problem on resistance and resistivity 10 Answer : Problem on resistance and resistivity 10 ...

Problem on resistance and resistivity 9 Answer : Problem on resistance and resistivity 9 ...

Problem on resistance and resistivity 8 Answer : Problem on resistance and resistivity 8 ...

Problem on resistance and resistivity 7 Answer : Problem on resistance and resistivity 7 ...

Problem on resistance and resistivity 6 Answer : Problem on resistance and resistivity 6 ...

Problem on resistance and resistivity 5 Answer : Problem on resistance and resistivity 5 ...

Problem on resistance and resistivity 4 Answer : Problem on resistance and resistivity 4 ...

Problem on resistance and resistivity 3 Answer : Problem on resistance and resistivity 3 ...

Problem on resistance and resistivity 2 Answer : Problem on resistance and resistivity 2 ...

Problem on resistance and resistivity 1 Answer : Problem on resistance and resistivity 1 ...

Name two methods for measurement of low, medium and high resistance. Give one advantage and one limi Answer : Methods for measurement of low resistance:Â 1. Ammeter voltmeter methodÂ 2. Kelvinâ€™s bridge methodÂ 3. Ohm meter methodÂ 4. Potentiometer methodÂ 5. Digital/analog multi-meter method.Â Methods for measurement of medium resistance:Â 1. Ammeter voltmeter methodÂ 2. Digital/analog m...

Name the method used to measure following resistances:- (i) Low resistance (ii) Medium resistance (i Answer : Following are the methods used to measure resistances:-Â (i) Low resistance: 1.Voltmeter-Ammeter Method 2. Kelvinâ€™s Double bridge MethodÂ (ii) Medium resistance: 1.Voltmeter-Ammeter Method 2. Wheatstoneâ€™s Bridge Method 3. Substitution MethodÂ (iii) Insulation resistance: 1. Ohmmeter 2. Megger...

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