Description : On what range should you set the voltmeter prior to taking a voltage measurement?
Last Answer : Highest.
Description : Voltage measurement in a high impedance circuit requires a voltmeter with
Last Answer : high input impedance
Description : When making voltage measurements in a high-resistance circuit, you should always use a voltmeter with what relative value of resistance?
Last Answer : . High.
Description : If the approximate voltage to be measured in a circuit is not known, you should _____________. A. use the lowest voltage range on the voltmeter B. connect the meter in series with the circuit C. only have to calibrate the meter before using it D. use the highest voltage range on the voltmeter
Last Answer : Answer: D
Description : An open shunt field in a direct current machine may be located by connecting the field circuit to an external power source, equal to the rated field voltage or less, and tested with a voltmeter from ... C. any suitable ground to any available line lead D. any field pole to each field coil lead
Last Answer : Answer: A
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
Description : Why should you always use the highest range when connecting a voltmeter to a circuit?
Last Answer : To prevent excess current through the meter movement.
Description : How is a voltmeter connected to the circuit to be measured?
Last Answer : In parallel.
Description : How to connect voltmeter and ammeter to circuit ?
Last Answer : : A voltmeter is connected in parallel with the two points of voltage circuit to measure the voltage difference. Again, to measure the flow rate of an electric circuit, ammeters are added to the electromagnetic circuit.
Description : A multimeter may be damaged by taking a _____________. A. voltage reading while in the ammeter mode B. current reading while in the voltmeter mode C. resistance reading while in the ammeter mode D. resistance reading while in the voltmeter mode
Description : When troubleshooting a lead-acid storage battery, a weak or dead cell is best detected by _________________. A. measuring and comparing all cells' specific gravity B. taking an open circuit ... electrolyte levels of each cell D. taking each cell's temperature with a calibrated mercury thermometer
Description : A device which can be used to check the calibration of a circuit breaker is a _________________. A. 500 volt megohmmeter B. portable low voltage high current testing unit C. standard digital multimeter D. clamp-on voltmeter
Last Answer : Answer: B
Description : To test fuses in an energized circuit, you should use a ____________. A. low voltage light bulb B. megohmmeter C. voltmeter D. resistance meter
Last Answer : Answer: C
Description : What is the polarity of voltage at point 'Z' in the circuit shown in the illustration? EL-0085 A. It will always be positive. B. It will always be negative. C. It depends on the instantaneous polarity at point 'W'. D. It cannot be determined without a voltmeter.
Description : A low voltage source is being used for testing armature coils. A coil short circuit will be indicated by a _______. A. high voltage reading, while the other coil readings will have an ... the other coil readings are steady D. steady voltmeter reading, while the other coil readings are fluctuating
Description : ___________ is device that measures the internal open circuit voltage of an equivalent noise generator having an impedance of 600Ω and delivering noise power to a 600 Ω load. A. Psophometer B. Barometer C. Reflectometer D. Voltmeter
Last Answer : A. Psophometer
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
Description : The voltage of a circuit is measured by a voltmeter having input impedance comparable with the output impedance of the circuit thereby causing error in voltage measurement. This error may be called as_________.
Last Answer : error caused by misuse of instrument
Description : What are two ways that circuit measurement is used?
Last Answer : Circuit measurement is used to (1) monitor the operation of a piece of electrical or electronic equipment and (2) determine the reason a piece of electrical or electronic equipment is not functioning properly.
Description : For measurement of potential difference, potentiometer is perferred in comparison to voltmeter because
Last Answer : For measurement of potential difference, potentiometer is perferred in comparison to voltmeter because A. ... does not take current from the circuit
Description : In order to increase its range of measurement, a resistance would be placed in series with which of the following instruments? A. DC voltmeter B. DC ammeter C. frequency meter D. power factor meter
Description : In order to make an accurate measurement as possible, the internal resistance of a voltmeter must be
Last Answer : as high as possible
Last Answer : Ryall crest voltmeter is used for measurement of High AC voltage.
Description : Before you connect a VOM in a circuit for an ohmmeter reading, in what condition must the circuit be?
Last Answer : De-energized
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 should a voltmeter read when a TX is set on coarse zero?
Last Answer : Approximately 37 volts.
Description : What is the advantage of using a battery test set versus a voltmeter to test batteries?
Last Answer : A battery test set will test batteries under load conditions.
Description : What is the general function of the differential voltmeter?
Last Answer : To compare an unknown voltage with a known reference voltage and indicate the difference in their values.
Description : Why would you use a hook-on voltmeter instead of a multimeter?
Last Answer : To measure current safely and easily (with no need to disconnect the wiring of the circuit).
Description : What method is used to allow a voltmeter to have several ranges?
Last Answer : The use of resistors in series with the meter movement.
Description : What is voltmeter sensitivity?
Last Answer : It is an indication of the resistance of the meter expressed in ohms per volt. The total resistance of the meter is the sensitivity multiplied by the full-scale voltage.
Description : How is the loading effect of a voltmeter kept to a minimum?
Last Answer : A voltmeter must have a high resistance compared to the circuit being measured.
Description : What is the loading effect of a voltmeter?
Last Answer : The connection of a voltmeter adds a resistance in parallel with the circuit changing the total circuit resistance, and loads the circuit.
Description : What electrical quantity is measured by a voltmeter?
Last Answer : Voltage.
Description : What term is used to express the sensitivity of a voltmeter?
Last Answer : Ohms per volt
Description : What are the advantages of using a differential voltmeter?
Last Answer : Accuracy and high input impedance.
Description : What if I connect to voltmeter series ?
Last Answer : If connected to the volt meter series, no text can be found on the meter. Because the internal resistance of the voltmeter is infinite.
Description : To determine the state of charge of a nickel-cadmium battery, you should ___________. A. check the electrolyte with a hydrometer B. use the constant specific gravity method C. use a nonbreakable mercury thermometer D. connect a voltmeter to the battery terminals
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
Description : Describe with neat circuit diagram the method of measurement of power in a High voltage, high current a.c circuit.
Last Answer : Circuit diagram: Explanation: The primary winding of P.T is connected across high voltage side and secondary winding is connected to pressure coil of low range wattmeter. The high voltage is ... is used Real power consumed = reading of wattmeter x ratio of C.T x ratio of P.T
Description : The charge of a lead-acid battery is checked with a/an ____________. A. manometer B. hydrometer C. voltmeter D. ohmmeter
Description : To properly use a hook-on-type volt/ammeter to check current flow, you must FIRST _____________. A. de-energize the circuit to allow connection of the instrument in series B. hook the jaws ... test leads to the appropriate terminals D. short the test leads and calibrate the instrument to zero
Description : If a half-wave rectifier is added to a half-wave voltage doubler, the resulting circuit is a voltage ___
Last Answer : Trippler.
Description : Does a filter circuit increase or decrease the average output voltage?
Last Answer : A filter circuit increases the average output voltage
Last Answer : Increase.
Description : What is the relationship of current to voltage in a circuit?
Last Answer : current increases as voltage increases.
Description : A series circuit consists of two resistors in series. R1 = 25 ohms and R2 = 30 ohms. The circuit current is 6 amps. What is the (a) source voltage, (b) voltage dropped by each resistor, (c) total power, and (d) power used by each resistor?
Last Answer : (a) 330 volts. (b) E1 = 150 volts. E2 = 180 volts. (c) 1.98 kilowatts. (d) P1 = 900 watts. P2 = 1.08 kilowatts component but in a parallel circuit total current divides among the available paths.
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 : A circuit has a source voltage of 100 volts and two 50-ohm resistors connected in series. If the reference point for this circuit is placed between the two resistors, what would be the voltage at the reference point?
Last Answer : 50 volts.
Description : If the current was increased to 4 amps, what would be the voltage drop across each resistor in the circuit described in question 17?
Last Answer : E1 = 80 volts. E2 = 240 volts. E3 = 320 volts