What term describes voltage or emf?

What term describes voltage or emf?
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1 Answer

Answer :

Difference of potential.
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Related questions

What is the name of the emf generated in the primary that opposes the flow of current in the primary?

Description : What is the name of the emf generated in the primary that opposes the flow of current in the primary?

Last Answer : . Self-induced or counter emf

An emf is generated in a conductor when the conductor is cut by what type of field?

Description : An emf is generated in a conductor when the conductor is cut by what type of field?

Last Answer : Magnetic field.

What is meant by induced emf? By counter emf?

Description : What is meant by induced emf? By counter emf?

Last Answer : Induced emf is the emf which appears across a conductor when there is relative motion between the conductor and a magnetic field; counter emf is the emf induced in a conductor that opposes the applied voltage.

What motor characteristic is affected by counter emf?

Description : What motor characteristic is affected by counter emf?

Last Answer : Speed.

What causes counter emf in a dc motor

Description : What causes counter emf in a dc motor

Last Answer : Generator action.

Why is no emf induced in a rotating coil when it passes through the neutral plane?

Description : Why is no emf induced in a rotating coil when it passes through the neutral plane?

Last Answer : No flux lines are cut.

What rule should you use to determine the direction of induced emf in a coil?

Description : What rule should you use to determine the direction of induced emf in a coil?

Last Answer : The left-hand rule for generators.

Which of the following statements describes what will occur if the motor shown in the illustration is required to carry 150% of full load? EL-0056 A. The primary counter emf will be increased. B. The stator current will increase. C. The slip will decrease. D. The slip value, stator current curve, and torque curve will all coincide.

Description : Which of the following statements describes what will occur if the motor shown in the illustration is required to carry 150% of full load? EL-0056 A. The primary counter emf will be increased. B. ... slip will decrease. D. The slip value, stator current curve, and torque curve will all coincide.

Last Answer : Answer: B

What term describes sounds capable of being heard by the human ear?

Description : What term describes sounds capable of being heard by the human ear?

Last Answer : Sonics.

What term describes a single object?

Description : What term describes a single object?

Last Answer : Unit

What term describes a device used to conduct heat away from a component?

Description : What term describes a device used to conduct heat away from a component?

Last Answer : A thermal shunt.

What term describes a material whose resistance remains relatively constant with changes in temperature?

Description : What term describes a material whose resistance remains relatively constant with changes in temperature?

Last Answer : Zero temperature coefficient.

What term describes how much of a cycle has been completed?

Description : What term describes how much of a cycle has been completed?

Last Answer : Phase or phase angle.

How does voltage drop related to impressed emf?

Description : How does voltage drop related to impressed emf?

Last Answer : Voltage drop is resultant of IR ie current and the lineresistance, not dependent on impressed emf

In the illustration, the diode between terminals 16 and 17 is to _________. EL-0046 A. insure that the voltage across the governor coil (EG-3P) never exceeds .6 VDC B. compensate for the temperature difference of the governor oil heating up C. protect the electronic governor from counter EMF D. act as a filter to prevent hunting

Description : In the illustration, the diode between terminals 16 and 17 is to _________. EL-0046 A. insure that the voltage across the governor coil (EG-3P) never exceeds .6 VDC B. compensate for the ... heating up C. protect the electronic governor from counter EMF D. act as a filter to prevent hunting

Last Answer : Answer: C

What are the advantages and disadvantages of estimating the voltage regulation of an Alternator by EMF method?

Description : What are the advantages and disadvantages of estimating the voltage regulation of an Alternator by EMF method?

Last Answer : Advantages: · Simple no load tests (for obtaining OCC and SCC) are to be conducted · Calculation procedure is much simpler Disadvantages: · The value of voltage regulation obtained by this method is always higher than the actual value

What is electro-motive force (emf) or voltage?

Description : What is electro-motive force (emf) or voltage?

Last Answer : It is the pressure that moves the electrons to flow in any conductor. It is also known as electromotive force voltage. Its symbol is ‘E’ or ‘V’ and measuring unit is volt measured by voltmeter. 

The terminal voltage of a cell supplying energy to a circuit is usually less than its emf because of the cell's w) size x) internal resistance y) mass z) energy

Description : The terminal voltage of a cell supplying energy to a circuit is usually less than its emf because of the cell's w) size x) internal resistance y) mass z) energy

Last Answer : ANSWER: X -- INTERNAL RESISTANCE

Why the emf of a cell is always greater than its terminal voltage? Explain the same.

Description : Why the emf of a cell is always greater than its terminal voltage? Explain the same.

Last Answer : Every practical source offers some opposition to the current due to its internal parts or components. Such a resistance of internal parts of source is called internal resistance of source. When source delivers ... less than emf induced. So, emf of a cell is always greater than terminal voltage.

What is called the EIectro-Motive Force (EMF) of a voltage source?

Description : What is called the EIectro-Motive Force (EMF) of a voltage source? (1) Terminal voltage when load is applied (2) Internal voltage when no load is applied (3) Product of internal resistance and load current (4) Electric pressure provided to the load

Last Answer : What is called the EIectro-Motive Force (EMF) of a voltage source? (1) Terminal voltage when load is applied (2) Internal voltage when no load is applied (3) Product of internal resistance and load current (4) Electric pressure provided to the load

What term applies to the voltage variation from no-load to full-load conditions and is expressed as a percentage?

Description : What term applies to the voltage variation from no-load to full-load conditions and is expressed as a percentage?

Last Answer : Voltage regulation.

a. Define the term "working voltage" of a capacitor. b. What should be the working voltage of a capacitor in a circuit that is operating at 600 volts?

Description : a. Define the term "working voltage" of a capacitor. b. What should be the working voltage of a capacitor in a circuit that is operating at 600 volts?

Last Answer : a. It is the maximum voltage the capacitor can work without risk of damage. b. 900 volts.

What is the term used to identify the points of minimum current and minimum voltage on an antenna?

Description : What is the term used to identify the points of minimum current and minimum voltage on an antenna?

Last Answer : Current and voltage nodes.

What is the term used to identify the points of high current and high voltage on an antenna?

Description : What is the term used to identify the points of high current and high voltage on an antenna?

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Write the Emf equation of transformer. State the meaning of each term in it.

Description : Write the Emf equation of transformer. State the meaning of each term in it. 

Last Answer : EMF equation of Transformer:- E1 = 4.44 f ØmN1 OR E1 = 4.44 f BmAN1 E2 = 4.44 f ØmN2 OR E2 = 4.44 f Bm AN2 Let, E1 = Primary emf E2 = Secondary emf N1= Number of turns in the primary N2 ... flux in core (wb) Bm= Flux density (wb/m2 /Tesla) A= Area of cross section of core m2 F = Frequency 

(a) Define permeability. (b) Define MMF. (c) Define form factor of an alternating quantity. (d) Define frequency and time period of an alternating quality. (e) Define transformation ratio of transformer. (f) State the EMF equation of a 1 transformer and state the meaning of each term used. (g) Give two applications of single phase motors.

Description : (a) Define permeability. (b) Define MMF. (c) Define form factor of an alternating quantity. (d) Define frequency and time period of an alternating quality. (e) Define transformation ratio of transformer. ... and state the meaning of each term used. (g) Give two applications of single phase motors. 

Last Answer : Permeability : It is the ability of a magnetic/Non magnetic material to allow setting up of flux in it.  MMF : The magneto motive force (MMF) is the force required to setup flux in a magnetic / ... applications of single phase motors : Water pumps, ceiling fan, lathe machine

The spectrum of a radar transmitter describes what characteristic of the output pulse?

Description : The spectrum of a radar transmitter describes what characteristic of the output pulse?

Last Answer : Frequency distribution

If a voltage (positive or negative) is measured on the "1" output of a flip-flop, what state is it in?

Description : If a voltage (positive or negative) is measured on the "1" output of a flip-flop, what state is it in?

Last Answer : SET state.

What would be the output of a negative clamper with a bias potential of −5 volts and an input voltage swing from +50 to −50 volts?

Description : What would be the output of a negative clamper with a bias potential of −5 volts and an input voltage swing from +50 to −50 volts?

Last Answer : -5 volts.

What is the filter called in which the low frequencies do not produce a useful voltage?

Description : What is the filter called in which the low frequencies do not produce a useful voltage?

Last Answer : High-pass filter, low-frequency discriminator, or low-frequency attenuator.

What is the name of the device that provides an increase in current, voltage, or power of a signal without appreciably altering the original signal?

Description : What is the name of the device that provides an increase in current, voltage, or power of a signal without appreciably altering the original signal?

Last Answer : Amplifier.

What is the relationship between the polarity of the voltage applied to the PNP transistor and that applied to the NPN transistor?

Description : What is the relationship between the polarity of the voltage applied to the PNP transistor and that applied to the NPN transistor?

Last Answer : The polarity of voltage applied to the PNP transistor is opposite of that applied to the NPN

To properly bias an NPN transistor, what polarity voltage is applied to the collector, and what is its relationship to the base voltage?

Description : To properly bias an NPN transistor, what polarity voltage is applied to the collector, and what is its relationship to the base voltage?

Last Answer : Positive, more positive.

The leads to the primary and the high-voltage secondary windings of a power transformer usually are of what color?

Description : The leads to the primary and the high-voltage secondary windings of a power transformer usually are of what color?

Last Answer : Primary leads-black; secondary leads red.

What causes a voltage to be developed across the secondary winding of a transformer?

Description : What causes a voltage to be developed across the secondary winding of a transformer?

Last Answer : The magnetic lines generated by the current in the primary cut

When taking a voltage measurement, which lead of the voltmeter should you connect to the circuit first?

Description : When taking a voltage measurement, which lead of the voltmeter should you connect to the circuit first?

Last Answer : Ground.

On what range should you set the voltmeter prior to taking a voltage measurement?

Description : On what range should you set the voltmeter prior to taking a voltage measurement?

Last Answer : Highest.

Which quantity (voltage or current) determines the intensity of an electrical shock?

Description : Which quantity (voltage or current) determines the intensity of an electrical shock?

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What is the purpose of "stickoff voltage"?

Description : What is the purpose of "stickoff voltage"?

Last Answer : It is used in synchro systems to prevent false synchronizations.

If an ac voltmeter is connected between the S2 and S3 windings on a TX, at what two rotor positions should the voltmeter read maximum voltage?

Description : If an ac voltmeter is connected between the S2 and S3 windings on a TX, at what two rotor positions should the voltmeter read maximum voltage?

Last Answer : . 150º and 330º

What is the output voltage of a CT when it is set on electrical zero?

Description : What is the output voltage of a CT when it is set on electrical zero?

Last Answer : Zero or minimum voltage.

What is the amplitude and voltage induced into the rotor when the CX is turned 90º while the CT remains on electrical zero?

Description : What is the amplitude and voltage induced into the rotor when the CX is turned 90º while the CT remains on electrical zero?

Last Answer : The voltage is maximum and in phase with the ac excitation voltage to the CX.

. What three factors determine the amplitude of the voltage induced into a stator winding?

Description : . What three factors determine the amplitude of the voltage induced into a stator winding?

Last Answer : The amplitude of the primary voltage, the turns ratio, and the angular displacement between the rotor and the stator winding.

When is the maximum voltage induced into a stator coil?

Description : When is the maximum voltage induced into a stator coil?

Last Answer : When the rotor coil is aligned with the stator coil.

How does the stator receive its voltage?

Description : How does the stator receive its voltage?

Last Answer : By the magnetic coupling from the rotor

Cold-cathode tubes can be used as voltage regulators because of what characteristic?

Description : Cold-cathode tubes can be used as voltage regulators because of what characteristic?

Last Answer : They have the ability to maintain a constant voltage drop across the tube despite changes in current flow.

The sequential rise in voltage between the two bases of the UJT is called what?

Description : The sequential rise in voltage between the two bases of the UJT is called what?

Last Answer : A voltage gradient

. In a common anode, seven-segment LED display, an individual LED will light if a negative voltage is applied to what element?

Description : . In a common anode, seven-segment LED display, an individual LED will light if a negative voltage is applied to what element?

Last Answer : The cathode.

In the inverting configuration, what is the voltage (for all practical purposes) at the inverting input to the operational amplifier if the input signal is a 1-volt, peak-to-peak sine wave?

Description : In the inverting configuration, what is the voltage (for all practical purposes) at the inverting input to the operational amplifier if the input signal is a 1-volt, peak-to-peak sine wave?

Last Answer : 0 volts.

In a full-wave voltage doubler, are the capacitors connected in series or in parallel with the output load?

Description : In a full-wave voltage doubler, are the capacitors connected in series or in parallel with the output load?

Last Answer : In parallel.