Conceptual Problems, Unit 6 Conceptual Problems, Unit 6 It includes the conceptual problems for ambitious, brilliant and curious students for competitions Q.6.01. The color of the surfaces of the bodies that can be impregnated with water becomes darker and richer…
NCERT Textual Problems Unit-7-B Q.7.27 Monochromatic radiation of wavelength 640.2nm (1 nm = 10-9 m) from a neon lamp irradiates a photosensitive material made of cesium on tungsten. The stopping voltage is measured to be 0.54 V. The source is…
Antenna Introduction Antennas are fundamental components of modern communication systems. They serve as the interface between electronic devices and the electromagnetic waves that carry information through the air. In a world where communication plays a pivotal role in our daily…
Wave Propagation The electromagnetic waves of frequencies ranging from 10 K Hz to 100 G Hz are used in space communication. In principle, all types of space communication systems make use of high-frequency radiowaves as the carrier for the message…
Oscillators A parallel combination of an induction coil and a capacitor is called a tank circuit, or LC circuit, which produces the oscillations, and the frequency of these oscillations depends upon the inductance and capacitance of the coil and the…
Logic gates Logic gates are the building blocks of digital electronics. They are used in digital electronics to change one voltage level (the input voltage) into another (the output voltage) according to some logical statement relating them. We’ve focused on…
Modulation Introduction: Definition of Modulation: Modulation is a fundamental process in signal processing and communication systems. It involves the modification of a carrier signal’s amplitude, frequency, or phase in response to variations in a message signal. This technique allows information…
communication People used to use trained pigeons to deliver messages back in the day. This method of the Principles of communication was unreliable, though. A messenger by the name of Harkara used to go through different towns so that the…
Fraunhofer’s lines Fraunhofer’s lines, also known as absorption lines, are dark lines that appear in the spectrum of sunlight or starlight. Joseph von Fraunhofer, a German physicist and optician, observed and studied these lines in the early 19th century. The…
Amplifiers These are the most important semiconductor electronic devices that increase the low level of small signals to higher levels. Transistors perform this function reliably, so they are also called amplifiers. A transistor can be used as an amplifier, an…
