EXAMIANS
In which of the transformer is the secondary nearly short circuited under normal operating condition?
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Consider the following statement - 1. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the current coil. 2. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the voltage coil circuit.
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The measurement of a quantity
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Purely mechanical instrument cannot be used for dynamic measurements because they have
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The limiting errors of measurement of power consumed by and the current passing through a resistance are ±1.5% and ±1% respectively. What is the limiting error ( in %) of measurement of resistance ?
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For measurement of high direct voltage, one would use _____ voltmeter.
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Most sensitive galvanometer is
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The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as
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For measurement of mutual inductance we can use
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When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is
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