Analysing Electromagnetic WavesThe electromagnetic spectrum consists of a group of waves of similar nature. The members of the electromagnetic spectrum arranged in increasing frequencies (decreasing wavelengths) are radio waves, microwaves, infrared rays…

What do you mean by logic gates?A logic gate is a switching circuit that is applied in computers and other electronic devices.It is the basic electronic building block used in computers and many other digital devices.A logic gate performs logical operat…

What is meant by cathode ray oscilloscope?Cathode Ray Oscilloscope or Cathode Ray Oscilloscope PdfA cathode ray oscilloscope (C.R.O.) is an instrument that converts electrical signals to a visual display.The main structure of the C.R.O. is a highly evacu…

What is Nuclear Energy?Nuclear Energy:In alpha and beta decay, energy is released in the form of kinetic energy of the daughter nuclide and radioactive emission. This is known as nuclear energy.Nuclear energy comes from the loss of mass in a nuclear rea…

What is radio active decay?Radioactive Decay:A stable nucleus of an element has the correct balance of protons and neutrons.Isotopes of an element which have too few or too many neutrons are usually unstable.Carbon-12 is stable but carbon-14 which has 2…

How is electricity generated in a power station?Electricity generated at power stations uses the same principle as the electricity produced by a bicycle dynamo, that is, electromagnetic induction.The huge generator at a power station is also known as an …

What is the electromagnetic induction?Induced E.M.F. and Induced CurrentFigure shows an induction cooker. During cooking, only the frying pan is heated up. The surface of the cooker is not heated. How is this made possible? The induction cooker uses a m…

Understanding Semiconductor DiodesSemiconductors:Figure shows the various types of electronic components made of semiconductor materials.A semiconductor is a material which can conduct electricity better than insulators, but not as well as conductors.Th…

Analysing Refraction of WavesFigure shows a surfer approaching the beach. As the waves enter the shallow water near the beach, the wavelength of the waves decreases. Hence, the speed of the waves decreases as the water gets shallower. Refraction of waves…

Analysing Diffraction of WavesFigure shows a scenery of a fishing village. It is noticed that when the waves passed through the narrow opening between the two concrete barriers, their shape changed. This observation can be explained by the diffraction of…