ECE :: Measurements and Instrumentation
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In a platinum RTD, the change in resistance for a temperature rise of 50° C is about
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Which of the following instruments is used almost exclusively to measure radio frequency currents?
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The coil of a DArsonval galvanometer has N turns. If flux density is B, current is I and area of coil is A, the deflecting torque is
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Consider the following statements regarding electromagnetic flowmeter
- AC excitation is used to avoid polarisation of fluid.
- The meter calibration is changed as viscosity of fluid changes.
- Stainless steel pipes can be used for measuring the flow of liquid of high conductivity.
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In a CRO, the time base signal is applied to
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Which of these instrument does not have a control spring?
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In Weston frequency meter, the magnetic axes of the two fixed coils are
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Which one of the following is true?
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A.
Alternating voltage and current contain odd and even harmonics
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B.
The inductance in a circuit reduces the effect of harmonics and makes current wave more sinusoidal than voltage wave
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C.
Alternating voltage and current waveforms, in general, do not contain odd harmonics
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D.
Inductance of a circuit does not alter wave shape at all
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