Description : What is the primary advantage of the electrodynamometer type meter over the D’Arsonval-type meter?
Last Answer : The electrodynamometer-type meter can be used to measure both ac and dc currents.
Description : Which of the following electric meter movements uses a stationary permanent magnet and movable coil? A. D'Arsonval B. Electrodynamometer C. Moving iron-vane D. Inclined coil iron-vane
Last Answer : Answer: A
Description : What advantage is gained by using pole pieces with curved faces in the D’Arsonval meter movement?
Last Answer : Two-position and three-position.
Description : What components in an electrodynamometer-type meter movement produce the magnetic field?
Last Answer : Fixed coils.
Description : What type of meter movement is the d’Arsonval meter movement?
Last Answer : A permanent-magnet moving-coil meter movement used in most electrical and electronic meters.
Description : What is the limiting factor as to the amount of current an electrodynamometer meter movement can handle?
Last Answer : Size of spiral conducting.
Description : How can a d’Arsonval meter movement be adapted for use as an ac meter?
Last Answer : By the use of a rectifier
Description : What are three functions of the hairsprings in a d’Arsonval meter movement?
Last Answer : To return the pointer to its rest position when there is no current flow; to oppose the coil movement when there is current flow; to provide electrical connections for the coil.
Description : What is the effect of current flow through the coil in a d’Arsonval meter movement?
Last Answer : A magnetic field is generated around the coil and the attraction of this field with the permanent magnet causes the coil to move
Description : What modification is made to the D’Arsonval meter movement to enable the meter to measure voltage?
Last Answer : A multimeter (high resistance) is placed in series with the coil of the meter.
Description : What component supplies restoring force to the coil of the D’Arsonval meter movement?
Last Answer : Hairspring.
Description : What component of the D’Arsonval meter movement completes the circuit for current flow to the coil?
Description : A useful instrument for checking A.C. motor performance by measuring possible unbalanced currents is the _____________. A. hand or battery-operated megger B. vibrating-reed frequency meter C. hook-on voltmeter-ammeter D. D'Arsonval iron-vane probe
Last Answer : Answer: C
Description : What is the primary advantage of power-amplifier transmitters over keyed-oscillator transmitters?
Last Answer : Frequency stability.
Description : What is the primary advantage of bulk-effect devices over normal pn-junction semiconductors?
Last Answer : Larger microwave power outputs.
Description : What is one advantage of an out-of-circuit meter when it is compared with an in-circuit meter?
Last Answer : Out-of-circuit meters can be used on more than one electrical or electronic device.
Description : Explain the error occurred due to pressure coil inductance of electrodynamometer type wattmeter. How this error is compensated?
Last Answer : For power measurement assume that the pressure coil of wattmeter is purely restitive. Hence current taken by pressure coil Ipc is in phase with voltage across the pressure coil Vpc ... inductive reactance XL the pressure coil circuit is made purely resistive and the error is eliminated.
Description : Explain construction & working of electrodynamometer type wattmeter.
Last Answer : Electrodynamometer Type Wattmeter: Construction: It essentially consists of the fixed and moving coil. The fixed coil is split into two equal parts which are placed close together and parallel to each other. ... hence these instruments can be used for measurement of A.C. & D.C. power.
Description : What is the primary advantage of the shielded pair?
Last Answer : The conductors are balanced to ground.
Description : What is the primary advantage of hybrid circuits?
Last Answer : Circuit flexibility
Description : What is the primary advantage of a ratio detector?
Last Answer : Suppresses amplitude noise without limiter stages.
Description : What is the primary advantage of using a current probe?
Last Answer : Current probes enable you to perform current measurements without disconnecting wires. Current probes are clamped around the insulated wire.
Description : . What is the primary advantage of an fsk transmission system?
Last Answer : Resistance to noise interference.
Description : What is the primary advantage of pulse-modulation systems?
Last Answer : . Low susceptibility to noise.
Last Answer : An Aryton shunt is used to make a D'Arsonval galvanometer into a multi range ammeter.
Description : What is a major advantage of the crimped terminal over the soldered terminal?
Last Answer : Requires relatively little operator skill to install.
Description : What advantage does a half adder have over a quarter adder?
Last Answer : The half adder generates a carry.
Description : What main advantage does a bridge rectifier have over a conventional full-wave rectifier?
Last Answer : The bridge rectifier can produce twice the voltage with the same size transformer.
Description : What is the advantage of using in-line wattmeters over output power meters?
Last Answer : Most in-line wattmeters are capable of measuring both forward and reflected power.
Description : For power measurements, what advantage does an electronic wattmeter have over an electrodynamic wattmeter?
Last Answer : Electronic wattmeters are capable of measuring high-fequency signals.
Last Answer : The bridge rectifier can produce double the voltage with the same size transformer.
Description : What is the great advantage of computers over typewriters?
Last Answer : Correcting errors.
Description : What is the advantage of single-sideband (ssb) transmission over AM transmission?
Last Answer : The same amount of intelligence can be transmitted with one sixth of the output power with less than one-half the bandwidth.
Description : Why is direct accessing of data a big advantage over the sequential accessing of data?
Last Answer : It gives us fast, immediate access to specific data without having to examine each and every record from the beginning.
Description : What advantage does a shunt motor have over a series motor?
Last Answer : It maintains a constant speed under varying loads.
Description : What is the major advantage of a transistor over a tube?
Last Answer : Rugged design.
Description : What, if any, noise susceptibility advantage exists for pulse-amplitude modulation over analog amplitude modulation?
Last Answer : Both are susceptible to noise and interference
Description : In a heterodyne-type frequency meter, what is the difference between the oscillator frequency and the unknown frequency?
Last Answer : Beat frequency.
Description : What type of frequency meter is shown and what is the value indicated for each meter in figure 1-52?
Last Answer : A) Vibrating-reed, 60Hz. (B) Moving-disk, 58 Hz.
Description : What type of meter is shown and what is the value of the quantity being measured for each meter in figure 1-51?
Last Answer : (A) Megger (megohmmeter), infinity; (B) Wattmeter, 9.5 kilowatts (9,500 watts). (C) Watt-hour meter, 2.693 megawatt-hours 2,693 kilowatt-hours) (2,693,000 watt-hours).
Description : What type of meter is shown and what is the value of the quantity being measured for each meter in figure1-49?
Last Answer : a. A dc ammeter, 90 mA dc b. A dc voltmeter, 200 V dc c. An ac voltmeter, 4.6 V ac d. An ohmmeter, 400 ohms
Description : What type of meter movement reacts to voltage rather than current?
Last Answer : Electrostatic.
Description : If a switch must be checked with power applied, what type of meter is used?
Last Answer : A voltmeter.
Description : Which is more accurate, the bridge- or reactance-type meter?
Last Answer : Bridge type.
Description : What happens when a frequency meter is adjusted to the frequency of the signal being measured?
Last Answer : Power is absorbed by the frequency meter cavity; and a pronounced dip in power, at the output, will be observed.
Description : What is the main difference between a vu and a dB meter?
Last Answer : DB meters are used for measuring sine waves. Vu meters are used to measure the average value of complex waveforms.
Description : When is an optical power meter measurement recommended for conducting field measurements on installed optical fiber cables or cable plants?
Last Answer : When an installed optical fiber cable or cable plant is less than 50 meters in length.