What is the purpose of a rectifier in a meter?

1 Answer

Answer :

A rectifier changes alternating current to pulsating direct current  and allows a dc meter to measure ac.

Related questions

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.

Description : What is the purpose of the rectifier in a magnetic amplifier?

Last Answer : The rectifier eliminates hysteresis loss.

Description : What is the purpose of the rectifier section?

Last Answer : To change ac to pulsating dc.

Description : If a half-wave rectifier is added to a half-wave voltage doubler, the resulting circuit is a voltage ___

Last Answer : Trippler.

Description : Is a full-wave rectifier output easier to filter than that of a half-wave rectifier?

Last Answer : Yes.

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 main disadvantage of a conventional full-wave rectifier?

Last Answer : Peak voltage is half that of the half-wave rectifier.

Description : What is the average voltage (Eavg) Output of a full-wave rectifier with an output of 100 volts peak?

Last Answer : 63.7 volts.

Description : What is the ripple frequency of a full-wave rectifier with an input frequency of 60 Hz?

Last Answer : 120 hertz.

Description : What was the major factor that led to the development of the full-wave rectifier?

Last Answer : The fact that the full-wave rectifier uses the full output, both half cycles, of the transformer.

Description : If the output of a half-wave rectifier is 50-volts peak, what is the average voltage

Last Answer : 15.9 volts.

Description : What is the name of the simplest type of rectifier which uses one diode?

Last Answer : The half-wave rectifier.

Description : What type of rectifier is constructed by sandwiching a section of semiconductor material between two metal plates?

Last Answer : Metallic rectifier.

Description : What is the output of a half-wave rectifier?

Last Answer : A pulsating dc voltage.

Description : Is a full-wave rectifier output easier to filter than that of a half-wave rectifier?

Last Answer : Yes.

Description : What main advantage does a bridge rectifier have over a conventional full-wave rectifier?

Last Answer : The bridge rectifier can produce double the voltage with the same size transformer.

Description : What is the main disadvantage of the conventional full wave rectifier?

Last Answer : The peak voltage is half that of a half-wave rectifier.

Description : What is the average voltage (Eavg) output of a full-wave rectifier that has an output of 100 volts peak?

Last Answer : 63.6 volts.

Description : What is the ripple frequency of a full-wave rectifier with an input frequency of 60 Hz?

Last Answer : 120 hertz.

Description : What is the equation for determining average voltage in a half-wave rectifier?

Last Answer : Eavg = 0.318 × Emax

Description : What is the Ripple frequency of a half-wave rectifier if the input frequency is 60 Hz?

Last Answer : 60 hertz.

Description : For a diode to act as a rectifier, should it be connected in series or parallel with the load?

Last Answer : Series.

Description : Does a rectifier tube conduct on the positive or negative alternation of the input signal?

Last Answer : Positive.

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 : In a heterodyne-type frequency meter, what is the difference between the oscillator frequency and the unknown frequency?

Last Answer : Beat frequency.

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.

Description : Why will a meter indicate more voltage at the battery terminal when the battery is out of a circuit than when the battery is in a circuit?

Last Answer : The internal (source) resistance of the battery will drop some of the voltage

Description : What condition produces the 10-kHz error signal generated by the metering bridge in the HP- 431C power meter?

Last Answer : An unbalance in the metering bridge.

Description : Besides setting up the meter for expected voltage ranges, what must be strictly observed when taking dc voltage readings?

Last Answer : Polarit

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 meter reading is shown on each multimeter in each part of figure 1-50?

Last Answer : (A) 410 mA dc; (B) 3.9 mA ac; (C) -22 V dc; (D) 600 V ac; (E) 1.4 V ac; (F) 1.9 kohms

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 is the quantity shown on the watt-hour meter in figure 1-46?

Last Answer : 5.945 megawatt-hours, or 5,945 kilowatt-hours, or 5,945, 000 watt-hours.

Description : What electrical quantity is measured by a watt-hour meter?

Last Answer : Energy.

Description : What is the only use for the voltage sensitive meter movement?

Last Answer : High-voltage measurement.

Description : What type of meter movement reacts to voltage rather than current?

Last Answer : Electrostatic.

Description : How is it possible to use a current sensitive meter movement to measure voltage?

Last Answer : Since the resistance of a meter movement remains the same as the pointer is deflected, the amount of current through the movement is proportional to the voltage applied. Therefore, only the scale of the movement must be changed.

Description : What electrical property is used by all the meter movements discussed so far?

Last Answer : Current.

Description : What value is indicated on the scale of an ac meter?

Last Answer : Effective value (rms).

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

Last Answer : Average value.

Description : What are two methods used to damp a meter movement?

Last Answer : As the coil moves through the field of the permanent magnet, a current is induced in the coil opposing the movement of the coil; and a vane can be attached to the coil and placed in the airtight chamber so that the movement of the vane opposes the movement of the coil.

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 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 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 : If a switch must be checked with power applied, what type of meter is used?

Last Answer : A voltmeter.

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.