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 1mA D' Arsonval movement has resistance of 100 Ω. It is to be converted to a 10 V voltmeter. The value of multiplier resistance is (A) 999 Ω (B) 9999 Ω (C) 9900 Ω (D) 990 Ω
Last Answer : C) Rs = (10/1x10^-3) - 100 Rs = 9900
Description : In order to make an accurate measurement as possible, the internal resistance of a voltmeter must be
Last Answer : as high as possible
Description : A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is (A) 1 Ω (B) 1.001 Ω (C) 0.5 Ω (D) 10 Ω
Last Answer : A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is 1.001 Ω
Description : Insulation resistance is measured by which meter?
Last Answer : megger
Description : A type of meter that gives a precise reading of voltage, current or resistance where there is the generation of samples at the input and then feeds it to a digital read-out.
Last Answer : DMM
Description : How much current does an electrostatic voltmeter require through it to operate?
Last Answer : zero current
Description : Error in voltmeter is due to ___
Last Answer : loading
Description : An electrostatic voltmeter in which an assembly of figure-8-shaped metal plates rotates between the plates of a stationary assembly when a voltage is applied betweeen the assemblies.
Last Answer : Kelvin voltmeter
Description : High sensitive DC voltmeter provides accurate reading when measuring ___ circuits.
Last Answer : high resistance
Description : Voltage measurement in a high impedance circuit requires a voltmeter with
Last Answer : high input impedance
Description : A Kelvin electrostatic voltmeter uses what method of damping?
Last Answer : fluid friction
Description : Which of the voltmeter is used for measuring high direct voltage (say 10kV)?
Last Answer : electrostatic
Description : What is the typical full-scale voltage across a moving coil voltmeter?
Last Answer : 50mV
Description : What should be the resolution of a digital voltmeter having three digit 0-3V?
Last Answer : 3mV
Description : A small swamping resistance is connected in series with operating coil of a moving coil ammter in order to compensate for the effects of ____
Last Answer : temperature variation
Description : To convert a galvanometer to a voltmeter, you should add a: w) high resistance in series x) high resistance in parallel y) low resistance in series z) low resistance in parallel
Last Answer : ANSWER: W -- HIGH RESISTANCE IN SERIES
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 : 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 electrodynamic meter used t measure power
Last Answer : wattmeter
Description : Type of power-line frequency meter composed of vibrating iron reed placed in alternating magnetic field
Last Answer : Vibrating Reed Type
Description : The only use of voltage senstive meter movement
Last Answer : very low voltage measurement
Description : When the meter is unsufficiently damped, it is considered as ___
Last Answer : underdamped
Description : It is the reciprocal of the full-scale current of a meter
Last Answer : sensitivity
Description : A meter when __ will become insensitive to small signals
Last Answer : overdamped
Description : Type of power-line frequency meter device utilizing a principle of balancing an indicator needle at center of a scale using magnetic fields opposing each other.
Last Answer : magnetic type
Description : A meter has a full-scale current of 50uA, what is its sensitivity?
Last Answer : Is=1/50uA=20kohm/V
Description : Errors due to frictions of the meter movement, incorrect spring tension, improper calibration or faulty instruments:
Last Answer : instrument errors
Description : What is that meter that depends for its operation on the forces attraction and repulsion
Last Answer : electrostatic instrument
Description : A tunable RF instrument, which, by means of a sharp dip of an indicating meter, indicates resonance with an external circuit under test
Last Answer : dip meter
Description : What is the most common type of meter movement?
Last Answer : D' Arsonval
Description : In meter movement, how do oyu prevent the meter from oscillating and overswing?
Last Answer : by damping
Description : What type of instrument is the watt-hour meter?
Last Answer : an integrating
Description : ___ meter is the most sensitive
Last Answer : 1uA
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 : 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 : What is interface level ? How do you calculate it ?
Last Answer : When a vessel is filled with two liquids of two different specific gravities the level measurement refers to as interface level. DP = H ( D - d ) On a level set the difference of two specific gravities.
Description : In an L-C -R series circuit connected to an AC source `V=V_(0)sin(100pi(t)+(pi)/(6))``V_(R)=40V, V_(L)=40 and V_(C )=10V`, resistance `R=4Omega` Choos
Last Answer : In an L-C -R series circuit connected to an AC source `V=V_(0)sin(100pi(t)+(pi)/(6))``V_(R)=40V, V_(L) ... (2) A` C. `20sqrt(2) A` D. `25sqrt(2) A`
Description : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is also in series with the diode. The current is a. 10 mA b. 9.3 mA c. 0.7 mA d. 0
Last Answer : b. 9.3 mA
Description : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the diode. The current through the diode is
Last Answer : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the diode. The current through the diode is 9.3 mA
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 : ___ has a series RC combination in one arm and a parallel RC combination in the adjoining arm and used as a notch filter in harmonic distortion analyzer.
Last Answer : wein bridge
Description : In a moving coil ammeter, a ___ is connected in series with the coil to compensate for temperature variations
Last Answer : swamping resistors
Description : Which of the following bridges measures dc resistance?
Last Answer : Wheatstone bridge
Description : A dc bridge widely used for the accurate measurements of resistance
Description : What sensor provides a change of resistance with typical power range of 1uW to 10mW and with maximum frequency greater than 100GHz
Last Answer : thermistor sensor
Description : A four-arm bridge. All arms of which are predominantly resistive; used for measuring resistance
Last Answer : Resistance Bridge and Wheatstone Bridge
Description : An AC bridge that measures inductance in terms of resistance and capacitance.
Last Answer : Owen's Bridge
Description : Resistance measuring instrument particularly used in determining the insulation resistance
Last Answer : Megger/Megaohmmeter