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प्रतिबल | प्रतिबल किसे कहते हैं प्रतिबल | प्रतिबल किसे कहते हैं ? पदार्थ के एकांक अनुप्रस्थ काट क्षेत्रफल के संगत आंतरिक प्रत्यानयन बल को प्रतिबल कहते हैं। प्रतिबल = (आंतरिक प्रत्यानयन बल/अनुप्रस्थ काट क्षेत्रफल ) = Fआंतरिक /A = Fबाह्य/A SI मात्रक : Nm–2 विमाएं : [M1 L–1 T–2] प्रतिबल के प्रकार (प्रतिबल किसे…
दृढ़ वस्तु (Rigid meaning in Hindi) Rigid body meaning in Hindi (rigid meaning in Hindi) दृढ़ वस्तु ( rigid meaning in Hindi) ( rigid body meaning in Hindi ) एक दृढ़ वस्तु एक ऐसे पिंड का एक आदर्शीकरण है जिसमें विरूपण शून्य होता है, चाहे उस पर कितना भी बाह्य विरूपक बल लगाया जाए। हम…
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प्रत्यास्थता (Elasticity in Hindi) प्रत्यास्थता (Elasticity in Hindi) प्रत्यास्थता पदार्थ का वह गुण है जिसके कारण वस्तु विरूपण बल के हटने पर अपने मूल आकार और आकृति को पुनः प्राप्त करने के लिए प्रवृत्त होती है। प्रत्यास्थता से संबंधित कुछ महत्वपूर्ण पद (Elasticity in Hindi) विरूपक बल :- वह बाह्य बल जो किसी पिंड की…
Elasticity Elasticity Elasticity is the property of matter by virtue of which a body tends to regain its original shape and size after the removal of deforming forces. Some important terms related to elasticity Deforming Force :- The external force which try to change the length, volume or shape of a body is called deforming…
Rigid Body A rigid body is an idealization of a body in which deformation is zero no matter how large an external deforming force is applied on it. We can define a rigid body as an object in which the relative positions of its constituent particles remains unchanged when external deforming forces are applied to…
De Broglie Equation in Hindi (डी ब्रोग्ली की परिकल्पना) डी ब्रोग्ली की परिकल्पना (De Broglie Equation in Hindi) क्योंकि विकिरण का दोहरा स्वभाव होता है अर्थात विकिरण, तरंग व कण दोनों गुण प्रदर्शित करती है और क्योंकि ब्रह्मांड विकिरण एवं द्रव्य से मिलकर बना है, अतः डी-ब्रोग्ली ने निष्कर्ष निकाला कि गतिमान कण का…
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Mass Energy Equivalence Mass Energy Equivalence :- From his special theory of relativity, Einstein showed that it is necessary to treat mass as another form of energy. According to this theory mass can be converted into energy and vice-versa. Mass Energy Equivalence relation(equation) :- If rest mass of an object is m, then Einstein…
Size of Nucleus Size of Nucleus As a measure of size of nucleus Geiger and Marsden(on Rutherford’s suggestion) performed α-particles scattering experiment on thin gold foils to find the distance of closest approach of the α-particles to the nucleus. They used α-particle of kinetic energy about 5.5 MeV and using principle of the conservation…
Isotopes and Isobars Isotopes and Isobars :- Mass spectrometer is a device which is used for accurate measurement of atomic masses. From this device it was found that there exist some atoms of the same element, which exhibit the same chemical properties, but differ in mass. Such atomic species of the same element differing…
Discovery of Neutron Discovery of Neutron :- Rutherford had discovered the nucleus in 1911, and had observed the proton in 1919. However, it seemed there must be something in the nucleus in addition to protons as there exist some atoms of the same element, which exhibit the same chemical properties, but differ in mass(called…