What are the advantages of using a differential voltmeter?

1 Answer

Answer :

Accuracy and high input impedance.

Related questions

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 : 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 purpose of using differential synchros instead of regular synchros?

Last Answer : Differential synchros can handle more signals than regular synchros and also perform addition and subtraction functions.

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

Last Answer : Ground.

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

Last Answer : Highest.

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 : What should a voltmeter read when a TX is set on coarse zero?

Last Answer : Approximately 37 volts.

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 : 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 : 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 : How is a voltmeter connected to the circuit to be measured?

Last Answer : In parallel.

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 : 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 : What precaution should you take when you use 115 volts to zero a differential?

Last Answer : Never leave the circuit energized for more than 2 minutes.

Description : What determines whether a differential synchro adds or subtracts?

Last Answer : The way the differential synchro is connected in a system is the deciding factor on whether the unit adds or subtracts its inputs.

Description : What are the two types of differential synchros?

Last Answer : The TDX and the TDR.

Description : If the single-input, differential-output, differential amplifier has an output signal taken between the two output terminals, what will the peak-to-peak amplitude of this combined output be?

Last Answer : 200 millivolts. A-18. a. Differential amplifier

Description : If the differential amplifier is configured with a single input and differential outputs, what will the output signals be?

Last Answer : Each output will be a sine wave with a peak-to-peak amplitude of 100 millivolts. The output signals will be 180 degrees out of phase with each other.

Description : How many inputs and outputs are possible with a differential amplifier?

Last Answer : Two inputs, two outputs.

Description : . How do tape transports with differential velocity capstans maintain a constant tape tension in the area around the magnetic heads?

Last Answer : The supply capstan is slightly larger than the take-up capstan. This causes the take-up capstan to pull the tape slightly faster than the supply capstan feeds the tape.

Description : Draw block diagram of successive approximation digital voltmeter. State its two advantages and two disadvantages

Last Answer : Block diagram Or Advantages: o It is economical method of analog to digital conversion. o The resolution is up to 5 important digits are obtained. Disadvantages: o ... depends on which type of switches are used. o The conversion time required for digital to analog converter.

Description : advantages of DVM over electric voltmeter?

Last Answer : Advantages:  1) In case of digital volt meter the output signals is available in the form of discrete numerical. Where as in analog voltmeter, output is made available by using pointer ... using a suitable transducer the quantities such as temperature, pressure, etc. can also be measured.

Description : State two advantages of using aluminum wire for carrying electricity over long distances.

Last Answer : It is light and reduces corona.

Description : Name two advantages in using ICs.

Last Answer : Low power consumption, compact size, and lower cost.

Description : What are the advantages of using two voltmeters in series?

Last Answer : Increased input impedance, greater accuracy, and increased voltage range.

Description : Conversion of heat into electrical er is achieved by using – (1) Ammeter (2) Hydrometer (3) Voltmeter (4) Thermocouple

Last Answer : (4) Thermocouple Explanation: Thermoelectric generators convert thermal energy into electricity by using heat from the body - or any object with a temperature gradient - as their energy source. ... energy into electricity. Bismuth telluride and its alloys are commonly used in thermocouples.

Description : Conductor resistance may be INDIRECTLY measured by using a/an _____________. A. voltmeter only B. ammeter only C. voltmeter and an ammeter D. ohmmeter only

Last Answer : Answer: C

Description : You are calibrating a multimeter using internal batteries to supply power for resistance measurements. However, you are unable to adjust the pointer to 'zero' using the adjustment knob. Therefore, you should ... change scales to the R X 100 scale and adjust using the 'zero ohms' adjusting knob

Last Answer : Answer: A

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 : A resistance in a circuit of unknown value is to be tested using the voltmeter/ammeter method. Therefore, the meters should be connected with _____________. A. both meters in series with the ... parallel with the resistance D. the ammeter in parallel and the voltmeter in series with the resistance

Last Answer : Answer: C

Description : When troubleshooting most electronic circuits, 'loading effect' can be minimized by using a voltmeter with a/an ___________________. A. input impedance much greater than the impedance across which the voltage ... sensitivity of less than 1000 ohms/volt D. sensitivity of more than 1000 volts/ohm

Last Answer : Answer: A

Description : Suppose the ammeter or voltmeter you are using in the Ohm’s law experiment does not have +ve and –ve terminal markings. How will you use such ammeter or voltmeter in the circuit?

Last Answer : Answer. We will use a typical battery to determine this. Connect them with wire and the battery if their readings are positive then we have connected them correctly and if their readings in negative then we have connected in opposite polarity.

Description : Describe working of A.C. voltmeter using half wave rectifier with neat circuit diagram. 

Last Answer : AC Voltmeter using Half Wave Rectifier : The a.c. voltmeter using half wave rectifier is achieved by introducing a diode in a basic d.c. voltmeter. This is shown in the Fig. 1. The diode D ... can be obtained for a.c. voltmeter as, Where Idc is the full scale deflection current..

Description : State any four precautions to be taken while using an Ammeter and Voltmeter. 

Last Answer : Precautions to be taken while using Ammeters: Ammeters are to be connected in series of circuits. 1. While connecting ammeters across emf source always a series resistance should be used. This ... first &then range should be decreased. 4. Loading effect can be minimized by using high sensitivity

Description : Electric current is measured using which of the following instrument ? (1) Ammeter (2) Voltmeter (3) Anemometer (4) Wattmeter

Last Answer : Ammeter

Description : Conversion of heat into electrical er is achieved by using : (1) Ammeter (2) Hydrometer (3) Voltmeter (4) Thermocouple

Last Answer : Thermocouple

Description : State the purpose of calibration of measuring instruments. Explain the procedure of calibration of D.C. voltmeter by using D.C. potentiometer.

Last Answer : Purpose of calibration : Calibration is the process of evaluating and adjusting the precision and accuracy of measuring equipment. Proper calibration of an instrument allows people to have a safe ... calibration curve can be drawn by plotting the percentage error against the measured voltages. 

Description : An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to  (1) 1.414 times dc sensitivity (2) dc sensitivity (3) 0.9 times dc sensitivity (4) 0.707 times dc sensitivity

Last Answer : An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to 0.9 times dc sensitivity

Description : What are two advantages of this type of coupling?

Last Answer : It uses fewer components than capacitive coupling and can provide an increase in gain.

Description : Besides eliminating the emitter-base battery, what other advantages can different biasing methods offer?

Last Answer : Compensation for slight variations in transistor characteristics and changes in transistor conduction because of temperature variations.

Description : What are two advantages that gas-filled tubes have over conventional electron tubes?

Last Answer : a. They can carry more current. b. They maintain a constant IR drop across the tube

Description : What is one of the primary advantages of the FET when compared to the bipolar transistor?

Last Answer : High input impedance.

Description : What are the most important advantages of the Schottky barrier diode?

Last Answer : Lower forward resistance and low noise.

Description : List the major advantages of printed circuit boards.

Last Answer : Eliminate heavy chassis and point-to-point wiring

Description : What are two advantages of a two-motor reeling system over a take-up control reeling system?

Last Answer : The two-motor configuration runs in both directions and a holdback voltage helps control tape tension, but it does not properly control tape tension during starts and stops.

Description : What are three advantages of adding an ac bias voltage to the input signal instead of adding a fixed dc bias voltage?

Last Answer : a. Reproduces a stronger output signal. b. Greatly improves the SNR. c. Greatly reduces the natural tape hiss.