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विद्युत ऊर्जा विद्युत ऊर्जा :- जब किसी बैटरी द्वारा किसी चालक में विद्युत धारा प्रवाहित की जाती है, तो बैटरी के अंदर संचित रासायनिक ऊर्जा का रूपांतरण चालक में मुक्त इलेक्ट्रॉनों की गतिज ऊर्जा के रूप में होता है। चालक में मुक्त इलेक्ट्रॉनों की परमाणुओं से निरंतर टक्कर होने के कारण इलेक्ट्रॉनों की गतिज…
de Broglie wavelength associated with an electron de Broglie wavelength associated with an electron :- Let an electron is accelerated from rest through a potential difference of V volt, then Kinetic energy acquired by the electron, Work done on electron, If the de Broglie wavelength of the electron is λ , then… de…
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de Broglie Equation de Broglie Equation :- Because radiation has a dual nature, that is, radiation exhibits both wave and particle properties, and because the universe is made up of radiation and matter, de-Broglie concluded that a moving particle must also have a dual nature because nature seeks symmetry. De Broglie’s hypothesis(de Broglie Equation)…
Question :- The velocity of end A of a rigid rod placed between two smooth vertical walls is u along vertical direction. Find out the velocity of end B of that rod, rod always remains in contact with the vertical wall and also find the velocity of centre of rod. Also find equation of path of centre of…
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What is Thermal Expansion What is Thermal Expansion :- Most materials expand when their temperatures increase. This phenomenon is known as thermal expansion and it has an important role in numerous engineering applications. For example, thermal-expansion joints, are included in buildings, concrete highways, railroad tracks, brick walls, and bridges to compensate for dimensional changes…
1 किलो वाट घंटा से क्या तात्पर्य है 1 किलो वाट घंटा से क्या तात्पर्य है :- कारखानों, घरों और कई अन्य कार्यों में खपत होने वाली बिजली की लागत की गणना किलोवाट घंटा (kWh) नामक इकाई के आधार पर की जाती है। विद्युत ऊर्जा की वाणिज्यिक इकाई अर्थात, “Board of trade unit” (BOTU) या…
Commercial Unit of Electrical Energy | (BOTU) Commercial Unit of Electrical Energy :- The cost of electricity consumed in the factories, houses and for many other works is calculated on the basis of a unit called kilowatt hour(kWh). What is Commercial Unit of Electrical Energy | (BOTU) | kWh Commercial Unit of Electrical Energy…
Temperature Dependence of Resistivity Temperature Dependence of Resistivity :- The resistivity of almost all materials depends on temperature, but not all materials show the same temperature dependence. In a limited temperature range (about 100 ºC or less), the resistivity of a conductor is expressed by the following relation :- …..(1) Here ρt…
प्रतिरोधकता की ताप पर निर्भरता प्रतिरोधकता की ताप पर निर्भरता :- लगभग सभी पदार्थों की प्रतिरोधकता ताप पर निर्भर करती है, किंतु सभी पदार्थ तापमान पर एक जैसी निर्भरता प्रदर्शित नहीं करते। एक सीमित ताप परिसर (लगभग 100 ºC या कम) में किसी चालक की प्रतिरोधकता ρ निम्न संबंध द्वारा व्यक्त की जाती है…
Carbon Resistor (Carbon Resistor Colour Code) Resistors used in laboratories and for domestic use are of two major types :- Wire bound resistors and Carbon resistors. 1. Wire bound resistors :- The selection of materials of wire bound resistors is done in such a way that their resistivity is relatively insensitive to temperature i.e., there…