In AC circuits, AC meters measure?

In AC circuits, AC meters measure?
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1 Answer

Answer :

RMS values
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Related questions

In AC circuits, AC meters measure – (1) mean values (2) rms values (3) peak values (4) mean square values

Description : In AC circuits, AC meters measure – (1) mean values (2) rms values (3) peak values (4) mean square values

Last Answer : (2) rms values Explanation: Voltages and currents for AC circuits are generally expressed as rms (root mean square) values. For a sine wave, the relationship between the peak and the rms average is: rms value = 0.707 peak value.

In AC circuits, AC meters measure (1) mean values (2) rms values (3) peak values (4) mean square values

Description : In AC circuits, AC meters measure (1) mean values (2) rms values (3) peak values (4) mean square values

Last Answer : rms values

Which of the following statements concerning AC circuits is correct? A. The power factor of a resistive circuit is always zero. B. True power in an inductive circuit always equals apparent power. C. Inductive reactance varies directly with the frequency and the inductance. D. Total opposition to the flow of alternating current depends upon the amount of reactive power.

Description : Which of the following statements concerning AC circuits is correct? A. The power factor of a resistive circuit is always zero. B. True power in an inductive circuit always equals apparent power. ... . D. Total opposition to the flow of alternating current depends upon the amount of reactive power.

Last Answer : Answer: C

Transformers are used onboard ships with AC generators to _____________. A. change frequency B. increase power output to modulating frequency controllers C. decrease power output to modulating frequency controllers D. permit higher voltage for electric motor operation and low voltage for lighting circuits

Description : Transformers are used onboard ships with AC generators to _____________. A. change frequency B. increase power output to modulating frequency controllers C. decrease power output to modulating frequency ... D. permit higher voltage for electric motor operation and low voltage for lighting circuits

Last Answer : Answer: D

AC circuits develop resistance, inductance, and capacitance. The inductive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Description : AC circuits develop resistance, inductance, and capacitance. The inductive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: A

AC circuits possess characteristics of resistance, inductance, and capacitance. The capacitive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Description : AC circuits possess characteristics of resistance, inductance, and capacitance. The capacitive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: A

One of the following is a possible cause of an abrupt frequency variation in a self exited transmitter oscillator circuits resulting to a poor frequency stability to hold a constant frequency oscillation. A. Heating and expansion of oscillator coil B. DC and RF ac heating of resistors which cause change in values C. Heating of capacitor in the oscillatorD. Loose connections in the oscillator, amplifier, or antenna circuits.

Description : One of the following is a possible cause of an abrupt frequency variation in a self exited transmitter oscillator circuits resulting to a poor frequency stability to hold a constant frequency ... capacitor in the oscillator D. Loose connections in the oscillator, amplifier, or antenna circuits.

Last Answer : D. Loose connections in the oscillator, amplifier, or antenna circuits.

Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.

Description : Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.

Last Answer : Real Power: It is the product of voltage, current and power factor i.e. P = V I cos j and basic unit of real power is watt. i.e. Expressed as W or kW. Apparent power: It is the product of ... X current X sinj or Reactive power = V I sin j and has no other unit but expressed in VAR or KVAR.

State different types of power in ac circuits. Write the expression and units for the same. Draw the power triangle.

Description : State different types of power in ac circuits. Write the expression and units for the same. Draw the power triangle. 

Last Answer : i) Active Power (P):- The active power is defined as the average power Pavg taken by or consumed by the given circuit.   ii) Reactive Power (Q):-  The reactive power is defined as the product of ... values of voltage (v) and current (I) it is given by    iv) Power Triangle: 

AC Circuits with Resistance but No Reactance

Description : AC Circuits with Resistance but No Reactance

Last 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 ... voltage. Voltage V A is common to both the branch hence voltage V A is common reference.

What is the need of polarity marking in polyphase AC circuits?

Description : What is the need of polarity marking in polyphase AC circuits?

Last Answer : Need of Polarity Marking in Polyphase AC Circuits: i) Polarity marking of terminals provides reference polarity for better understanding of system, even if the polarity of ac voltage changes ... of current transformers in relay protection circuit and getting desired performance is very difficult.

Compare AC & DC track circuits on i) Length of circuit ii) Application iii) Effect of stray currents. iv) Maintenance

Description : Compare AC & DC track circuits on i) Length of circuit ii) Application iii) Effect of stray currents. iv) Maintenance

Last Answer : Ans: i) Length of circuit - a) AC track circuit is having long length upto 3 to 5 km b) DC track circuit is having short length  ii)Application -a) AC track circuit is used ... ) Maintenance - a) AC track circuit has easier and cheaper maintenance b) DC track circuit has complicated maintenance 

The instantaneous power in ac circuits can be obtained by taking product of the instantaneous values of

Description : The instantaneous power in ac circuits can be obtained by taking product of the instantaneous values of 

Last Answer : The instantaneous power in ac circuits can be obtained by taking product of the instantaneous values of current and voltage

Wagner's earth devices are used in AC bridge circuits for

Description : Wagner's earth devices are used in AC bridge circuits for (a) Eliminating the effect of earth capacitances (b) Eliminating the effect of intercomponent capacitances (c) Eliminating the effect of stray electrostatic fields (d) Shielding the bridge elements

Last Answer : Wagner's earth devices are used in AC bridge circuits for Eliminating the effect of earth capacitances

In AC. circuits, laminated iron is invariably used in order to?

Description : In AC. circuits, laminated iron is invariably used in order to?

Last Answer : In AC. circuits, laminated iron is invariably used in order to reduce eddy current loss.

does ohm's law apply to ac circuits?

Description : does ohm's law apply to ac circuits?

Last Answer : Yes it does, but as it is supplied with ac we will have to take impedance in account.

Which of these is used to measure current in series circuits?

Description : Which of these is used to measure current in series circuits?

Last Answer : ammeter

The illustrated circuits are used to measure ___________. EL-0024 A. resistance B. gauss or magnetic field strength C. battery discharge rate in Amp-hours D. current

Description : The illustrated circuits are used to measure ___________. EL-0024 A. resistance B. gauss or magnetic field strength C. battery discharge rate in Amp-hours D. current

Last Answer : Answer: A

When working on electrical circuits containing large capacitors, in addition to deenergizing the circuit, which of the listed precautions should also be taken? A. Keep all radio equipment away. B. Measure capacitor insulation resistance. C. Ground the capacitor terminals. D. Check capacitor circuit polarity.

Description : When working on electrical circuits containing large capacitors, in addition to deenergizing the circuit, which of the listed precautions should also be taken? A. Keep all radio equipment ... capacitor insulation resistance. C. Ground the capacitor terminals. D. Check capacitor circuit polarity.

Last Answer : Answer: C

Why PM-MC meters can't be used for AC measurements?

Description : Why PM-MC meters can't be used for AC measurements?

Last Answer : It wont work for AC measurements. Not designed for ACapplication

The use of thermocouple meters for AC measurement leads to a meterscale which is _____.

Description :  The use of thermocouple meters for AC measurement leads to a meterscale which is _____.

Last Answer :  The use of thermocouple meters for AC measurement leads to a meterscale which is square law.

Why do we measure a bus in meters rather than centimeters?

Description : Why do we measure a bus in meters rather than centimeters?

Last Answer : Actually, bus dimensions are marked on buses in millimetres (inthe UK, and probably Europe, at least) - for some reason thebuilding trade uses plans to millimetres but then uses pencils(especially as ... object and using centimetres would result in largenumbers - it's a matter of a sensible unit.

Would you measure a goldfish in meters or centimeters?

Description : Would you measure a goldfish in meters or centimeters?

Last Answer : centimeters

If Susan wants to measure of board but she doesn't have a ruler to measure with however she does have several copies of a book that she knows is 17 meters tall Susan leaves the books and to end and fi?

Description : If Susan wants to measure of board but she doesn't have a ruler to measure with however she does have several copies of a book that she knows is 17 meters tall Susan leaves the books and to end and fi?

Last Answer : Feel Free to Answer

Why would i use square meters to measure a floor tile?

Description : Why would i use square meters to measure a floor tile?

Last Answer : Need answer

Would you measure a goldfish in meters or centimeters?

Description : Would you measure a goldfish in meters or centimeters?

Last Answer : centimeters

What measure is the best estimate for the average height of a middle school students 1.5 meters 1.5 centimeters 1.5 kilometers 1.5 millimeters?

Description : What measure is the best estimate for the average height of a middle school students 1.5 meters 1.5 centimeters 1.5 kilometers 1.5 millimeters?

Last Answer : 1.5 centimeters

What all does FPL meters measure kw/kwh and what else?

Description : What all does FPL meters measure kw/kwh and what else?

Last Answer : Florida Power & Light Company only measures kw/kwh (kilowatt per kilowatt hour). However, your bill will include a standard customer charge to cover general maintenance and administration fees. Fuel charges, ... and taxes are also included in the bill. These charges are based on your electric usage.

Induction type single phase energy meters measure electric energy in?

Last Answer : Induction type single phase energy meters measure electric energy in kWh.

When reading AC current with the multimeter shown in the illustration and you are unsure of the range, the range switch should be set to ___________. EL-0047 A. 10 MA/ 10 AMP with leads in the (-10 A) and (+10 A) jacks B. 10 MA/ 10 AMP with leads in the (-COMMON) and (+) jacks C. 10 MA/ 10 AMP with leads in the (-COMMON) and (+10 A) jacks D. unable to measure AC current with this multimeter

Description : When reading AC current with the multimeter shown in the illustration and you are unsure of the range, the range switch should be set to ___________. EL-0047 A. 10 MA/ 10 AMP with leads in the (-10 A ... leads in the (-COMMON) and (+10 A) jacks D. unable to measure AC current with this multimeter

Last Answer : Answer: D

If reading AC current with the illustrated device and unsure of the range as a precaution , the first step should be to _________. EL-0047 A. secure power and test for voltage B. disconnect the lead to be tested and connect the meter in series C. connect the meter to measure resistance and use Ohm's law to calculate current D. unable to safely measure current with the device

Description : If reading AC current with the illustrated device and unsure of the range as a precaution , the first step should be to _________. EL-0047 A. secure power and test for voltage B. disconnect the ... resistance and use Ohm's law to calculate current D. unable to safely measure current with the device

Last Answer : Answer: A

When attempting to measure AC current with the device shown and you are unsure of the range, the range switch should be set to __________. EL-0047 A. 10 MA / AMPS with leads in the (-10 A) and (+10 A) jacks B. 10 MA / AMPS with leads in the (-COMMON) and (+) jacks C. 10 MA / AMPS with leads in the (-COMMON) and (+10 A) jacks D. unable to accurately measure AC current with this device as illustrated

Description : When attempting to measure AC current with the device shown and you are unsure of the range, the range switch should be set to __________. EL-0047 A. 10 MA / AMPS with leads in the (-10 A) and ... (-COMMON) and (+10 A) jacks D. unable to accurately measure AC current with this device as illustrated

Last Answer : Answer: D

Thermocouple is used to measure a) AC b) DC c) Both d) None

Description : Thermocouple is used to measure a) AC b) DC c) Both d) None

Last Answer : Ans: Both

List three meter movements that can measure either ac or dc without the use of a rectifier.

Description : List three meter movements that can measure either ac or dc without the use of a rectifier.

Last Answer : Electrodynamic, moving vane, and hot-wire or thermocouple.

What value does a meter movement react to (actually measure) when measuring ac?

Description : What value does a meter movement react to (actually measure) when measuring ac?

Last Answer : Average value.

‘PMMC instrument is not suitable to measure AC quantity’. State the reason.

Description : ‘PMMC instrument is not suitable to measure AC quantity’. State the reason.

Last Answer : The direction of force exerted on moving coil depends on the direction of current flowing through moving coil. If the direction of magnetic field is kept constant, it produces unidirectional torque if the current is ... on the coil in one cycle to zero. Hence the meter cannot read A.C. quantities.

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic

Description : An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be  (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

Last Answer : An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field

Which of the following instruments can be used to measure AC current only?

Description : Which of the following instruments can be used to measure AC current only? (a) Permanent Magnet Type ammeter(b) Induction type ammeter (c) Moving iron voltmeter(d) Moving iron ammeter

Last Answer : (b) Induction type ammeter

can ammeter measure ac?

Last Answer : Yes it can...