Figure. RVDT In the previous article, we have learned about Linear variable differential transformer (LVDT). Rotary Variable Differential Transformer (RVDT) is a variation of LVDT and used to sense angular displacement. It is a passive transducer. In short, RVDT provides
Fig. Inductive Transducers (source: eddylab.com) Inductive Transducers In Inductive transducers, the basic principle is that self-inductance of a single coil or the mutual inductance between two coils is changed by a quantity to be measured i.e. measurand. Usually,
Unit The result of measurement of a physical quantity must be defined both in kind and magnitude. The standard measure of each kind of physical quantity is called a unit. Lets take an example of length.
Modulation The term modulation means ‘to change‘ or ‘to modify‘. Modulation is the process of transmission of the information signal (low-frequency audio signal) using a high-frequency carrier signal. Modulation is the basic requirement for transmitting the message signal through free space.
Frequency Modulation It is the process in which the frequency of the carrier signal is varied by the modulating signal while the amplitude remains same. It is different from Amplitude modulation as there is amplitude variation. Let carrier wave be
Amplitude Modulation(AM) The process of varying amplitude of the high-frequency or carrier wave in accordance with the intelligence (code, voice or music) to be transmitted, keeping the frequency and phase of the carrier wave unchanged, is known as the amplitude
The comparison between Moving Coil & Moving Iron Instruments is given in the table below. S.No. Moving Coil Instruments Moving Iron Instruments 1. It works on the principle of DC motor. It works on the principles of magnetism. 2. Deflection torque is proportional
Digital Voltmeter A digital voltmeter (DVM) is truly a voltage measuring unit where unknown analog DC voltage is to be measured i.e. first converted to digital form and then displayed on seven segment display. The accuracy, versatility, precision, robustness of Digital
Q-meter is an instrument designed for measuring Q-factor of a coil as well as for the measurement of inductance, capacitance, and resistance of an electric circuit at radio frequency. Q-meter is also known as RLC meter. What is Q-factor of
Q. What is VTVM? Answer. VTVM is a vacuum tube voltmeter. It makes the use of vacuum tube(s) as an active device. Q. Enlist the types of VTVMs? Answer. Average reading, peak reading, slide back, logarithmic, balanced Bridge and electrometer