ADC gives polarity indication.
1. True
2. False
3.all of the above
4.All of the Mentioned
Clock pulses are controlled ______
1.automatically
2.using microcontrollers
3.using valves
4.manually
Feedback voltage is applied to the ________
1.comparator
2.error amplifier
3.potentiometer
4.sliding contact
How is 11.87 V displayed on a 10 V range for a 4 digit display?
1.11.870
2.1.1870
3.118.7
4. 0.1187
How to obtain balance?
1. by using a detector
2.by changing the pot setting
3.by supplying voltage
4. by using a transformer
In a potentiometric DVM ____
1.voltage is compared
2.current is compared
3.resistance is compared
4.power is compared
Input voltage depends on ______
1.resistance
2.capacitance
3.current
4.time-period
Noise rejection is poor.
1.True
2.False
3.all of the above
4.None of the mentioned
Old information is used to set range relays.
1. True
2.False
3.all of the above
4.None of the mentioned
Output of a digital multimeter is _____
1.mechanical
2. optical
3. electrical
4.analog
Sensitivity of a DVM is given by _______
1.S = 1
2. S = (fs)min
3. S = (fs)min × R
4.S = R
What is the output voltage in a dual slope integrating type DVM?
1.differential of the input
2.multiple of the input
3.integral of the input
4.zero
A 3 digit display DVM with a maximum reading of 1999 indicates _______
1.increase by a factor
2. reduction by a factor
3.no change in value
4.depends on the circuit components
A practical Q meter consists of ______
1.Wien bridge oscillator
2.AF oscillator
3.RF oscillator
4.Crystal oscillator
A.C. voltages are measured using _______
1.oscillators and op amps
2.rectifiers and filters
3.resistor and capacitor
4.inductor and resistor
Accuracy depends on ______
1. input voltage
2. drop across the capacitor
3.magnitude and stability of pulse generator
4.magnitude of the ramp
Accuracy of a potentiometric DVM is _____
1. zero
2.medium
3. low
4.high
ADC counter ________
1.attenuates the signal
2. converts digital to analog
3.converts analog to digital
4.contains information
Analog mulimeters require power supply.
1.True
2.False
3.all of the above
4.None of the mentioned
Autoranging means ______
1.automatic ranging
2.fixed ranging
3.automobile ranging
4. constant ranging
Basic building blocks of digital multimeter are _____
1. oscillator, amplifier
2.diode, op amp
3.rectifier, schmitt trigger
4.A/D, attenuator, counter
Consider a 3 digit display for a DVM with an accuracy of ± 0.5 % for a reading of ± 1 digit. Compute the error for 5 V reading on a 10 V range.
1. ± 10 V
2.± 0.035 V
3.± 0.05 V
4. ± 1 V
Current is converted to voltage ______
1. through a voltmeter
2.through a resistance
3.through an ammeter
4.through a galvanometer
Digital multimeter is used for _____
1.measuring a.c. and d.c. current, voltage and resistance
2.measuring a.c. current and voltage
3.measuring d.c. current and resistance
4.measuring a.c. voltage and resistance
For a value less than 0200, the instrument should ________
1.read values less than 0200 correctly
2. read values randomly
3.automatically switch range
4.should not respond at all
For resistance measurement, meter contains ____
1.high current source
2. medium current source
3. low current source
4.low voltage source
How is the reference voltage obtained?
1.from a fixed current source
2.from a variable voltage source
3.from a variable current source
4.from a fixed voltage source
In a potentiometric DVM, balance is obtained manually.
1.True
2.False
3.all of the above
4.None of the mentioned
Integration period is obtained by ______
1.using signal amplitude
2.counting the pulse
3.measuring time
4.by differentiating the signal
Integrator’s output is ______
1.attenuated through a filter
2.feedback to the input
3.stored in a flip-flop
4. differentiated
Output of the comparator is known as ___
1.amplified signal
2.error signal
3. feedback signal
4.attenuated signal
Q factor is also defined as the ratio of _______
1.resistance to reactance
2.reactance to resistance
3. power to voltage
4.current to power
Q factor is called ______
1.Quality factor
2.Quantity factor
3.Queen factor
4.Quarter factor
Q meter works on the principle of _______
1.barkhausen criterion
2.piezoelectric effect
3. parallel resonance
4.series resonance
Quantities are digitised using _______
1.D/A converter
2.oscillator
3.amplifier
4.A/D converter
Resistance is measured using _____
1. constant current source
2.constant voltage source
3.variable current source
4. variable voltage source
Resolution of a DVM is given by _______
1. R = 1⁄10n
2.R = 1
3. R = 10n
4. R = n⁄10
Sensitivity is largest change in input.
1.True
2.False
3.all of the above
4.None of the mentioned
Slider movement depends on ______
1.current magnitude
2.resistance magnitude
3.voltage magnitude
4.power magnitude
Unknown voltage is _____
1.converted to current
2.boosted
3.filtered
4.measured using a voltmeter
Voltage across the shunt is measured by ________
1.voltmeter
2.multimeter
3.thermocouple
4.thermometer
What is a Q meter?
1.quality meter
2.quantity meter
3.instrument
4.detector
What is the counter value at the beginning?
1.one
2.ten
3. three
4.zero
What is the effect of clock on the voltage?
1.voltage doubles with clock input
2.voltage halves with clock input
3.no effect
4. voltage becomes zero with clock input
What is the effect of the capacitor on the output?
1.no effect
2.charging effect
3.electrostatic effect
4.magnetic effect
What is the maximum count of the counter?
1.9999
2.0
3. 500
4.1000
What is the resolution for a 3 digit display?
1.1 %
2.0.1 %
3.0.001 %
4. 10 %
What is the resolution of a 3 digit display on 1 V range?
1.1 V
2.0.1 V
3. 0.01 V
4.0.001 V
What is the significance of the name dual slope method?
1. it has two slopes
2.it integrates the input twice
3.it uses two inputs
4.it has two outputs
Why is dual slope method preferred over ramp techniques?
1.no noise
2. partial noise
3.average noise
4.maximum noise