Q. Figure shows an RC potentiometer to measure ac voltage. It is desired that V0/Vi should be independent of frequency. The value of C should be

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Q. Magnetic flux density has the dimensions

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Q. A full wave rectifier type meter is used to measure the wave shape shown in figure. The voltmeter is calibrated to read rms value of sine wave. The reading of voltmeter will be

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Q. In figure the bridge is balanced when Z4 is

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Q. The dimensions of EMF are

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Q. In figure, the position of voltmeter and ammeter are exchanged. It may result in damage to

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Q. In the wheatstone bridge in figure, each resistance is increased by 0.05%. The value of v0 will be

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Q. In the balanced bridge shown in figure. X should be

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Q. In figure, Za = 100∠50°, Zb = 300∠-90° and Zc = 200∠0°. For balanced condition, Zd will be

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Q. The current through a resistance R is shown in figure. The computed value of power is

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Q. What would be the reading of voltmeter as shown in below figure. The voltmeter has a 0-1 V scale and is a 20000 Ω/V meter

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Q. Figure shows a Wheatstone bridge with RTD to one arm. If resistance of RTD = 1020 Ω, the voltage V0 is

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Q. The ac bridge in figure is balanced. Z1 = 100∠30°, Z2 = 150∠0°, Z3 = 250∠ - 40° Then Z4 =

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Q. In bridge circuit of figure, equivalent resistance between A and B is

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Q. Which of the following closely represents the resistance-temperature characteristics of thermistor?

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Q. In figure the output V0 is

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Q. If n measurements of a quantity are made, the arithmetic mean is

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Q. The standard deviation σ in terms of n observations having deviations from mean dm can be written as

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Q. In figure, C0 is distributed capacitance and C is tuning capacitor. If C = C1 for fundamental frequency and C = C2 for second harmonic, then C0 =

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Q. If M is mutual inductance between fixed and moving coils and θ is deflection of dynamometer instrument, then

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