Description : The device used ' for the measurement of current, voltage and resistance is: A. AVO meter B. Galvanometer C. Ammeter D. Ohm meter
Last Answer : ANSWER: A
Description : A multipurpose instrument for measuring current, potential difference and resistance is a) Ohmmeter b) Astatic galvanometer c) Rheostat d) AVO Meter
Last Answer : d) AVO Meter
Description : Which one of the following is the name of a device used to measure voltage without drawing ANY current from the circuit being measured? Is it: w) a wattmeter x) a galvanometer y) an ammeter z) a potentiometer
Last Answer : ANSWER: Z -- A POTENTIOMETER
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
Last Answer : Answer: A
Description : An ammeter with an internal resistance of 50 ohm(s) is used to measure a current thorugh a lod resistor Rl = 1 kohm(s). Determine the percentage error of the reading due to ammeter insertion.
Last Answer : 50/(50+1k)*100 = 4.76%
Description : A galvanometer with 20 ohms coil resistence has a full-scale deflection of 10 mA. A 0.02 ohm is placed across the meter to increase its rating capacity. What is the new full scale current for the meter?
Last Answer : False.
Description : What is the name of the device used to convert alternating current into direct current ? (1) Ammeter (2) Galvanometer (3) Rectifier (4) Transformer
Last Answer : Rectifier
Description : An internal resistance is placed in series with the meter movement of which of the following instruments? A. AC ammeter B. DC ammeter C. DC voltmeter D. Frequency meter
Last Answer : Answer: C
Description : An ammeter has a full-scale deflection current of 100mA. If the same ammeter is used to measure a full-scale current of 1.0ampere, what is the value of the shunt resistor in ohms if the voltage across the meter is 9.0 volts?
Last Answer : 10 ohms
Description : In a ammeter `0.2%` of main current passes through the galvanometer. If resistance of galvanometer is `G`, the resistance of ammeter will be
Last Answer : In a ammeter `0.2%` of main current passes through the galvanometer. If resistance of galvanometer is `G`, the ... 1)/(500)G` D. `(500)/(499)G`
Description : A galvanometer of 65 Ω resistance gives full scale deflection with 4 mA current. In order to convert it into ammeter, the range of 10 A is connected with it, the shunt resistance should be a) 0.1 Ω b) 0.2 Ω c) 0.06 Ω d) 0.03 Ω
Last Answer : d) 0.03 Ω
Description : A galvanometer is an instrument used to measure ___________. A. thickness of galvanized metal B. resistance of electrical wiring insulation C. very small amounts of current or voltage D. quantity of galvans in an electric circuit
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 : An ammeter has a current change of 0-5A and its internal resistance is 0.2 ohm. In order to Change the range to 0-25 A, wear need to add a resistance of A) 0.8 ohm in series with the meter B) ... series with the meter C) 0.04 ohm in parallel with the meter D) 0.05 ohm in parallel with the meter
Last Answer : An ammeter has a current change of 0—5A and its internal resistance is 0.2 ohm. In order to Change the range to 0-25 A, wear need to add a resistance of 0.05 ohm in parallel with the meter
Description : An ammeter should be used to measure ___________. A. the voltage between two points in a circuit B. circuit continuity C. current flow in a circuit D. total or partial circuit resistance
Description : A moving coil galvanometer is converted into an ammeter reads upto `0.03 A` by connecting a shunt of resistance `4r` across it and ammeter reads up `0
Last Answer : A moving coil galvanometer is converted into an ammeter reads upto `0.03 A` by connecting a shunt of resistance `4r` ... `0.02A` C. `0.03A` D. `0.04A`
Description : Desirable resistance of a ________ is achieved by connecting a high resistance Rh in series with a galvanometer a) Ammeter b) Ohmmeter c) LED d) Voltmeter
Last Answer : d) Voltmeter
Description : Which of the instruments listed could be use to locate a grounded field coil in a synchronous motor? A. Ammeter B. Voltmeter C. Megohmmeter D. Frequency meter
Description : A permanent magnet moving coil ammeter has a coil resistance of 99 ohm and Full Scale Deflection (FSD) current of 0.1mA. Shunt resistance is 1 ohm. Current through the meter at 0.5 F.S.D is:
Last Answer : A permanent magnet moving coil ammeter has a coil resistance of 99 ohm and Full Scale Deflection (FSD) current of 0.1mA. Shunt resistance is 1 ohm. Current through the meter at 0.5 F.S.D is: 0.05mA
Description : What is an AVO meter?
Last Answer : The Avometer was a British brand of multimeter, latterly owned by Megger. It is often called simply an AVO and derives its name from the first letter of the words amperes, volts, ohms
Description : Digital version of an AVO meter is known as a) Digital Ohmmeter b) Multimeter c) Digital Multimeter d) None of these
Last Answer : c) Digital Multimeter
Description : The basic meter movement responds to the flow of current through its coil. Therefore, this meter movement may be used as a/an _____________. A. voltmeter by placing a resistance in parallel with the ... in parallel with the coil D. ammeter by placing a low resistance in parallel with the coil
Last Answer : Answer: D
Description : The unit to measure the flow of water is - (1) Micro Mho (2) Ohm meter (3) Milli curie (4) Cusecs
Last Answer : (4) Cusecs Explanation: The unit to measure the flow of water is cusecs. Cusecs is short form of Cubic feet per second.
Description : The unit to measure the flow of water is (1) Micro Mho (2) Ohm meter (3) Milli curie (4) Cusecs
Last Answer : Cusecs
Description : In a galvanometer, the deflection becomes one half when the galvanometer is shunted by a 20 ohm resistor. The galvanometer resistance is
Last Answer : In a galvanometer, the deflection becomes one half when the galvanometer is shunted by a 20 ohm resistor. The galvanometer resistance is 10 Ohm
Description : Instrument used to find the source of seismic waves is known as a) seismometer b) voltmeter c) galvanometer d) ammeter
Last Answer : a) seismometer
Description : The bridge most suited for measurement of a four-terminal resistance in the range of 0.001 Ohm to 0.1 Ohm (A) Wien’s bridge (B) Kelvin double bridge (C) Maxwell’s bridge (D) Shering Bridge
Last Answer : The bridge most suited for measurement of a four-terminal resistance in the range of 0.001 Ohm to 0.1 Ohm (A) Wien’s bridge (B) Kelvin double bridge (C) Maxwell’s bridge (D) Shering Bridge
Description : If resistance is 8 Ohm and current is 16 ampere then what will be the voltage and power?
Last Answer : 128 volts ,2048 watts
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 : In order to take a current reading with a 'clamp-on' ammeter, the instrument's jaws _________________. A. should remain open B. cannot touch the adjacent conductor C. must be fully closed D. will act as a transformer primary
Description : Prior to taking a resistance reading with a volt-ohm-milliammeter, the 'zero' setting must be adjusted. After clipping the two leads together, you find the adjustment knob will not return the pointer ... range setting B. weak batteries C. a faulty zero ohms knob D. a faulty meter movement
Last Answer : Answer: B
Description : Calculate the shunt resistance needed to increase the FSD of an ammeter 5 times if the meter resistance is 1kohm
Last Answer : 250ohms
Description : A moving coil meter has a resistance of 3 Ω and gives full scale deflection with 30 mA. To measure voltage up to 300 V, the external resistance to be connected in series with the instrument is (A) 9997 Ω (B) 10000 Ω (C) 997 Ω (D) 10003 Ω
Last Answer : A moving coil meter has a resistance of 3 Ω and gives full scale deflection with 30 mA. To measure voltage up to 300 V, the external resistance to be connected in series with the instrument is 9997 Ω
Description : A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The value (in ohm) of necessary shunt will be
Last Answer : A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The value (in ohm) ... 001` B. `0.01` C. 1 D. `0.05`
Description : A potentiometer having the potential gradient of `2 mV//cm` is used to measure the difference of potential across a resistance of `10 ohm`. If a lengt
Last Answer : A potentiometer having the potential gradient of `2 mV//cm` is used to measure the difference of potential across a ... `) A. 1 B. 2 C. 5 D. 10
Description : What is the name of the device used to convert alternating cur-rent into direct current? (1) Amreter (2) Galvanometer (3) Rectifier (4) Transformer
Last Answer : (3) Rectifier Explanation: A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification.
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
Description : What is the difference between megger test equipment and contact resistance meter test instruments?
Last Answer : Megger test equipment used to measure cable electric resistance, conductor continuity, phase identification. Contact resistance meter test instruments used to measure low resistance like relays, contactors.
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 : Assertion current sensitivity of a galvanometer is directley proportionall to the current through the coil. Reason Voltage sensitivity is inversely pr
Last Answer : Assertion current sensitivity of a galvanometer is directley proportionall to the current ... sensitivity is inversely proportional to voltage.
Description : A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10-divisions per milliampere and voltage sensitivity is 2 divisions per
Last Answer : A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10-divisions per milliampere and voltage ... `10^(3)` D. `10^(5)`
Last Answer : If we increase the current sensitivity of a galvanometer the voltage sensitivity will Decrease.
Description : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is (A) 11% (B) 9% (C) 1.1% (D) 3%
Last Answer : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is 11%
Description : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is (A) 300 W (B) 150 W (C) 45 W (D) 20 W
Last Answer : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is 150 W
Description : Which of the following precautions should be taken when troubleshooting various power circuits using a common solenoid-type mechanical voltage tester (wiggins)? A. Never use this tester on circuits greater ... voltage expected in the circuit in order to prevent damage from an off-scale reading.
Description : A galvanometer having resistance of `50 Omega` requires a current of `100 Omega A` to given full scale deflection. How much resistance is required to
Last Answer : A galvanometer having resistance of `50 Omega` requires a current of `100 Omega A` to given full scale ... in series D. `10^(5)Omega` in parallel
Description : A galvanometer has a coil of resistance `100 Omega` and gives a full-scale deflection for `30 mA` current. If it is to work as a voltmeter of `30 V` r
Last Answer : A galvanometer has a coil of resistance `100 Omega` and gives a full-scale deflection for `30 mA` current. ... Omega` C. `1000 Omega` D. `1800 Omega`