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A 3 ½ digit dual slope integrated DVM, 2 V full scale is used to measure a time varying voltage V(t) = 1.0 + 2 sin 50 πt. The voltmeter indicates
A digital voltmeter uses a 20 MHZ clock and has a voltage controlled generation switch provides a width of 20 μ sec per volt of unit signal. 25 V of input signal would correspond to pulse count of –
In a digital voltmeter, the oscillator frequency is 400 kHz and the ramp voltage falls from 8V to 0V in 20m sec. The number of pulse counted by the counter is
How would a reading 0.6973 V be displayed on digit digital voltmeter on its 10 V scale.
A 200 mV full scale dualslope 3 ½ digit DMM has a reference voltage of 100 mV and a first integration time of 100 ms. For an input of [100 + 10 Cos (100πt)] mV, the conversion time (without taking the autozero phase time into consideration) in millisecond is______.
A rectifier type instrument uses a bridge rectifier and has its scale calibrated in terms of rms values of a sine wave. It indicates a voltage of 2.22 V. When measuring a voltage of triangular wave shape. Estimate the error –
A dual slope integrating type A/D converter has 5 μF capacitor and 25 kΩ resistor connected to it. If the reference voltage is taken as 10 V and output voltage of integrator cannot exceed 10 V then time for which reference voltage can be integrated will be – (in msec)
In a multimeter circuit, for a.c. voltage measurement, what is the function of diode D_{2}?
Determine the error percentage of the voltage reading due to the insertion of a voltmeter. R_{1} = 3 kΩ, R_{2} = 2 kΩ and the internal resistance of the voltmeter is 40 kΩ.
Which meter has a greater sensitivity meter A having a range of 0  15 V and a multiplier resistance of 22 kΩ, or meter B with a range of 0  300 V and multiplier resistance of 324 kΩ? Both meter moments have a resistance of 2 kΩ.
22 docs284 tests

22 docs284 tests
