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2 A 0 50 A moving coil ammeter has a voltage drop of 01 V across its terminals at full scale deflection The external shunt resistance in milliohms needed to extend its range to 0 500 A is

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Questions


A 0-1 Ampere moving iron ammeter has an internal resistance of 50 mΩ and inductance of 0.1 mH. A shunt coil is connected to extend its range to 0-10 Ampere for all operating frequencies. The time constant in milliseconds and resistance in mΩ of the shunt coil respectively are
1 Answer

A moving coil instrument having a resistance of 10 Ω, gives a full-scale deflection when the current is 10 mA. What should be the value of the series resistance, so that it can be used as a voltmeter for measuring potential difference up to 100 V? (A) 9 Ω (B) 99 Ω (C) 990 Ω (D) 9990 Ω
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The circuit below incorporates a permanent magnet moving coil milli–ammeter of range 1 mA having a series resistance of 10kΩ. Assuming constant diode forward resistance of 50Ω a forward diode drop of 0.7 V and infinite reve
1 Answer

T he voltage and current drawn by a resistive load are measured with a 300 V voltmeter of accuracy  1% of full scale and a 5 A ammeter of accuracy  0.5% of full scale. The readings obtained are 200 V and 2.5 A. The limiting error (in %) in computing the load resistance is (up to two decimal places) ____.
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A resistance-meter has five measurement range-settings between 200 Ω and 2 MΩ in multiples of 10. The meter measures resistance of a device by measuring a full-range voltage of 2 V across the device by passing an appropriate constant current for each range-setting. If a device having a resistance value in the range 8 kΩ to 12 kΩ and a maximum power rating of 100 μW is to be measured safely with this meter, the choice for range-setting on the meter for best resolution in measurement, in kΩ, is
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A single-phase 100 kVA, 1000 V / 100 V, 50 Hz transformer has a voltage drop of 5% across its series impedance at full load. Of this, 3% is due to resistance. The percentage regulation of the transformer at full load with 0.8 lagging power factor is
1 Answer

M.C (Moving coil) and M.I (Moving Iron) type of instrument can be distinguished by their
1 Answer

The channel resistance of an N-channel JFET shown in the figure below is 600 Ω -gate-ece-2011
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The channel resistance of an N-channel JFET shown in the figure below is 600 Ω -gate-ece-2011
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A 220 V DC shunt motor takes 3 A at no-load. It draws 25 A when running at full-load at 1500 rpm. The armature and shunt resistances are 0.5 Ω and 220 Ω, respectively. The no- load speed in rpm (round off to two decimal places) is ________.
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A 230 V, 50 Hz ac supply is applied to a coil of 0.06 H inductance and 2.5 resistance connected in series with a 6.8 µF capacitor. Calculate (i) Impedance (ii) Current (iii) Phase angle between current and voltage (iv) power factor
1 Answer

Fill in the blanks GATE-Instrumentation-Engineering-2014
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A galvanometer can be converted into an ammeter by connecting a
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The output voltage of a single-phase full bridge voltage source inverter is controlled by unipolar PWM with one pulse per half cycle. For the fundamental rms component of output voltage to be 75% of DC voltage, the required pulse width in degrees (round off up to one decimal place) is __________.
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A single well encounters multiple clean sands of exactly the same thickness, porosity and permeability. Rw is the formation fluid resistivity and Rmf is the mud filtrate resistivity.
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In a laboratory, a flow experiment is performed over a hydraulic structure. The measured values of discharge and velocity are 0.05 m^3/s and 0.25 m/s, respectively. If the full scale structure (30 times bigger) is subjected to a discharge of 270 m^3/s, then the time scale (model to full scale) value (up to two decimal places) is ______ (GATE-CIVIL-Engg-2018)
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A long-channel NMOS transistor is biased in the linear region with 𝑉𝐷𝑆=50 mV and is used as a resistance. Which one of the following statements is NOT correct? Gate-2016
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A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor. He reports that -CBSE physics class 10
1 Answer

Fill in the blanks GATE-Instrumentation-Engineering-2014
1 Answer

A cantilever beam ABC is shown to a highly exaggerated vertical scale. Horizontally, AB is 2 m long and BC is 0.6 m long. Loads act only in the region AB, and there are no loads in the region BC. Under this load system, the deflection at B is 0.24 cm and the slope of the beam at B is θ, where sin θ = 0.038. What is the deflection at D, which is midway between B and C?
0 Answer
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