Description : Decreasing the value of the shunt resistor of an ammeter, it current measuring capability
Last Answer : increases
Description : What ammeter is mostly used in measuring high frequency currents?
Last Answer : thermocouple
Description : Most AC voltmeters have an rms scale which is valid only if the input signal being measured is a __ signal.
Last Answer : sinusoidal
Description : In a moving coil ammeter, a ___ is connected in series with the coil to compensate for temperature variations
Last Answer : swamping resistors
Description : This refers to a four-arm ac bridge used for measuring inductance against a standard capacitance.
Last Answer : Maxwell Bridge
Description : Refers to an ac bridge for measuring the inductance and Q of an inductor in terms of resistance, frequency and a standard capacitance.
Last Answer : hay bridge
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 : Meters with moving coil are normally used for measuring ____
Last Answer : dc only
Description : When the vertical input is 0V, the electron beam may be position at the __ of the screen.
Last Answer : vertical center
Description : The interval of a pulse from start to end is the __ of the pulse
Last Answer : period
Description : An oscilloscope provides easy measurement of __ values.
Last Answer : peak to peak
Description : A meter when __ will become insensitive to small signals
Last Answer : overdamped
Description : On a simple ohmmeter, the 0 ohm(s0 mark is located __ of the scale
Last Answer : at far right
Description : A certain pulse measures 10ms and has a period of 50ms. The duty cycle is __
Last Answer : 10ms/50ms = 20%
Description : ___ ammeter is used to measure high-frequency currents.
Description : Error in ammeter reading is due to
Last Answer : insertion
Description : Which is the best type of ammeter movement?
Last Answer : D'Arsonval
Description : Which of the ammeter below has no insertion error?
Last Answer : clamp-meter
Description : What kind of instrument is an ammeter?
Last Answer : an indicating
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 : 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 : Moving-iron instrument has a/an scale
Last Answer : squared
Description : Draw a potentiometer temp. Measuring circuits and explain its?
Last Answer : OPERATION : The input to the instrument is a measurement of some in the processes using a sensing element ( such as thermocouple ) or a device to produce direct voltage, which is the voltage (signal) ... to zero results ( null point ) the balancing ( servo motor is be longer driven )
Description : What are the primary elements for measuring pressure ?
Last Answer : The primary elements used for measuring pressure are : Bourdon tube. Diaphragm. Capsule. Bellows. Pressure Springs. The above are known as elastic deformation pressure elements. Type ... pressure. Pre.spring : Pressure springs of helical or spiral shape used for measuring high pressures.
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 electronic measuring device that provide instantaneous visual indication of voltage excursions
Last Answer : oscilloscope
Description : Resistance measuring instrument particularly used in determining the insulation resistance
Last Answer : Megger/Megaohmmeter
Description : ___ is used for measuring medium Q coils
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 : High sensitive DC voltmeter provides accurate reading when measuring ___ circuits.
Last Answer : high resistance
Description : A common technique for measuring power at high frequency is to ______
Last Answer : employ a sensing element that converts the RF power to a measureable dc or low-frequency signal
Description : Which of the voltmeter is used for measuring high direct voltage (say 10kV)?
Last Answer : electrostatic
Description : What is the basic unit for measuring current flow?
Last Answer : ampere
Description : An instrument used for measuring the amount of current flowing in a circuit.
Last Answer : ammeter
Description : An AC bridge that measures capacitance and dissipation factor
Last Answer : Schering Bridge
Description : An AC bridge that measures inductance in terms of resistance and capacitance.
Last Answer : Owen's Bridge
Description : An AC bridge that measures mutual inductance
Last Answer : Heaviside bridge
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 : Current range extension in moving coil instruments can be achieved by placing a ___ in shunt with the instrument.
Last Answer : low resistance resistor
Description : As the deflection of the moving system increases, the controlling torque in an indicating instrument.
Description : A moving system force in an analog instruments which causes the moving system to deflect from its zero position.
Last Answer : deflecting force
Description : Permanent-magnet moving coil instrument can be used in
Last Answer : dc work only
Description : A force in analog instrument which quickly brings the moving system to rest in its final position.
Last Answer : damping force
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 : What is the reason why the scale of a permanent-magnet moving coil instrument is uniform?
Last Answer : because it is spring controlled
Description : Which of the following forces does not act on the moving systems of analog instruments?
Last Answer : an electrostatic force
Description : What is the typical full-scale voltage across a moving coil voltmeter?
Last Answer : 50mV
Description : What is the typical full-scale deflection current of a moving coil instrument?
Last Answer : 50mA