Description : When both deflecting and controlling torque act, the pointer of an indicating instrument comes to
Last Answer : rest
Description : If the pointer of an indicating instrument is in motion, then what opposes deflecting torque?
Last Answer : damping and controlling torque
Description : What is the typical full-scale deflection current of a moving coil instrument?
Last Answer : 50mA
Description : An indicating instrument whose movable coils rotate between two-stationary coils, usually used as wattmeter
Last Answer : electrodynamometer
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 force acting on the pointer of an indicating instrument when it is in motion?
Last Answer : controlling, damping and deflecting torques
Description : Indicating instrument is assumed to be most accurate at what part of the scale?
Last Answer : at half or full
Description : The pointer of an indicating instrument is generally made of
Last Answer : aluminum
Description : Controlling torque in PMMC
Last Answer : spring action
Last Answer : The damping torque must operate only when the moving system of the indicating instrument is: Actually moving
Description : A moving system force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value
Last Answer : controlling force
Description : A force in analog instrument which quickly brings the moving system to rest in its final position.
Last Answer : damping force
Description : Moving-iron instrument has a/an scale
Last Answer : squared
Description : Current range extension in moving coil instruments can be achieved by placing a ___ in shunt with the instrument.
Last Answer : low resistance resistor
Description : Permanent-magnet moving coil instrument can be used in
Last Answer : dc work only
Description : What is the reason why the scale of a permanent-magnet moving coil instrument is uniform?
Last Answer : because it is spring controlled
Description : What kind of voltage is applied to the horizontal deflection plates of the oscilloscope?
Last Answer : sweep voltage
Description : Generally, oscilloscope uses what type of deflection?
Last Answer : electrostatic deflection
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 : In RF and microwave system, what instrument is used to measure the incidental and reflected signals?
Last Answer : reflectometer
Description : A dynamometer instrument is mainly used as a/an
Last Answer : wattmeter
Description : An instrument of device having recognized permanent of stable value that is used as a reference.
Last Answer : standard instrument/device
Description : The scale of a hot-wire instrument is a/an ___function
Description : What is an electronic instrument capable of showing on screen and maybe on print, relative spacing of transmitter carriers, their sidebands and harmonics?
Last Answer : Spectrum Analyzer
Description : A device or instrument, which delivers signals of precise frequency and amplitude, usually over a wide range
Last Answer : signal generators
Description : The smallest change in a measured variable to which an instrument will respond.
Last Answer : resolution
Description : This instrument measures temperatures by electric means, especially temperatures beyong the range of mercury thermometers
Last Answer : pyrometer
Description : Which instrument is the most sensitive?
Last Answer : permanen-magnet moving coil
Description : A device or instrument able to generate noise with accurate voltage for test purposes
Last Answer : noise generator
Description : Resistance measuring instrument particularly used in determining the insulation resistance
Last Answer : Megger/Megaohmmeter
Description : What is that instrument used for measuring the strength and direction of magnetic fields?
Last Answer : magnetometer
Description : Majority of analog measuring instrument utilizes one of the following effects.
Last Answer : magnetic effect
Description : Determine which is not a dynamic instrument
Last Answer : Logic
Description : What do you call of an instrument that depends for its operation on the reaction between magnetic flux set up by currents in fixed windings and other currents set up by electromagnet induction in movable conducting parts?
Last Answer : induction instrument
Description : An electro pyrometer is an instrument used to measure?
Last Answer : high temperatures
Description : An instrument used to detect and measure the presence of electrical current is generally called
Last Answer : galvanometer
Description : Basically, a PMMC instrument can be used only in
Last Answer : dc measurements
Description : Another name for PMMC instrument
Last Answer : D'Arsonval
Description : What is this instrument or circuit that has four or more arms, by means of which one or more of the electrical constance of an unknown component may be measured?
Last Answer : bridge
Description : Dynamometer type instrument can be used for
Last Answer : both dc and ac works
Description : An instrument in which the magnitude of the measured quantity is indicated by means of pointer.
Last Answer : analog instrument
Description : What type of instrument is the watt-hour meter?
Last Answer : an integrating
Description : What kind of instrument is an ammeter?
Last Answer : an indicating
Description : An instrument used for measuring the amount of current flowing in a circuit.
Last Answer : ammeter
Description : A moving system force in an analog instruments which causes the moving system to deflect from its zero position.
Last Answer : deflecting force
Last Answer : A moving coil instrument is used as an ohmmeter. The indicating scale of the meter will be Hyperbolic.
Description : Describe spring control method of producing controlling torque in measuring instrument. Write any two properties required for spring material.
Last Answer : A)Spring control method: As shown in the figure, the inner ends of the both springs are attahced to the spindle, while outer end of upper spring is attached to the lever and outer ... of spring material: 1.Non Magnetic material 2.Low specific resistance 3.Low temperature coefficient of resistance
Description : State the function of controlling torque in electrical measuring instrument.
Last Answer : Function of controlling torque 1. The function is to opposes the deflection force and increases with the increase in the deflection of the moving system, to limit its movement. 2. and brought ... set a position where the two opposing forces i.e. deflection and controlling forces are equal.
Last Answer : In a portable instrument, the controlling torque is provided by spring.