Piezoelectric Effect in Rochelle Salt, Quartz Crystal and Tourmaline

Piezoelectric Effect in Rochelle Salt, Quartz Crystal and Tourmaline Piezoelectric Effect: Some crystalline materials like Rochelle Salt, Quartz and Tourmaline exhibit the Piezoelectric Effect. When we apply an AC voltage across them they vibrate at the frequency of the applied Read More

Oscillators – Introduction, Types and Applications

Oscillators – Introduction, Types and Applications An electronic device that generates sinusoidal oscillations of desired frequency is known as sinusoidal oscillator. It receives DC energy and changes it into AC energy of desired frequency. In oscillators, the feedback voltage is Read More

Operational Amplifier – Input Characteristics, Common Mode Gain, CMRR and Slew Rate

Operational Amplifier – Input Characteristics, Common Mode Gain, CMRR and Slew Rate Operational Amplifier: An operational amplifier (Op-amp) is a multistage amplifier and consists of a differential amplifier stage, a high Common Emitter (CE) amplifier stage and Class-B Push-Pull emitter follower. Read More

Amplifier Frequency Effects

Amplifier Frequency Effects Frequency response of an amplifier is the graph of its Gain versus the Frequency. The middle range of frequency is where amplifier is normally operated. At low frequencies coupling and bypass capacitor acts as high capacitive reactance Read More

Types of MOSFET

TYPES OF MOSFET Suitable for the post of Junior Engineer in BSNL, DMRC, DRDO, PTCUL, RRB, UPCL, etc examination. Metal Oxide Semiconductor Field Effect Transistor (MOSFET) is also called as Insulated Gate Field Effect Transistor (IGFET). The Depletion Mode MOSFET (DMOS): DMOS has a piece Read More

Most Important Points | DC Circuits

Most Important Points | DC Circuits An independent source which can deliver or absorb energy continuously is called an Active Element. The resistivity of Annealed Copper at 20 degree centigrade is 1.725 x 10^-8 ohm-m. Of all Pure Metals, the Read More

What is Reflectance

The measure of the proportion of light striking a surface which is reflected off it is known as Reflectance. On a clear Day, the sun may produce in excess of 90,000 lm/m2 of illumination on the surface of the Earth and Read More