Vacuum Breakdown: In the Townsend type of discharge in a gas described earlier, electrons get multiplied due to various ionization processes and an electron avalanche is formed. In a high Vacuum Breakdown, even if the…
Permanent Magnet Moving Coil Instrument (PMMC): In this type of Permanent Magnet Moving Coil Instrument (PMMC), we have a coil suspended in the magnetic field of a permanent magnet in the shape of a horse-shoe.…
Pole Amplitude Modulation Induction Motor: Pole changing method as already discussed allows a change of speed by a factor 2. In some applications, speed change is required only by a small amount, e.g. some fan…
Voltage and Current in Series Resonant Circuit: The variation of impedance and current with frequency of Voltage and Current in Series Resonant Circuit is shown in Fig. 8.7. At resonant frequency, the capacitive reactance is…
Difference between loudness and intensity of sound: The difference between loudness and intensity of sound is given in table below Sl no Loudness Intensity 1 It is the amount of sensation produced in the ear…
Skin Effect in Transmission Lines: Skin Effect in Transmission Lines - When a conductor is carrying steady direct current (d.c.), this current is uniformly distributed over the whole X-section of the conductor. However, an alternating…
What is Resistor Transistor Logic (RTL) Circuit? Resistor Transistor Logic (RTL) is a saturated logic and makes use of only transistors and resistors as circuit elements and also of resistors in the input to each…
Ultra High Voltage Circuit Breakers: The specific requirements demanded of a Ultra High Voltage circuit breaker by system and operator considerations are at present considered to be the following. Speed of Operation: For Ultra High…
Thyristor in Static Relay: The structure of Thyristor in Static Relay consists of four alternate p-and n-type layers. In the thyristor (also called a silicon controlled rectifier—SCR) connections are made available to the inner layers.…
Summing Amplifier Circuit Diagram: Figure 14.17 shows an Summing Amplifier circuit diagram in inverting configuration with three inputs Va, Vb, Vc. Depending on the relation between Ra, Rb, Rc and RF, the circuit can be used…
