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द्विधातु पट्टी(Bimetallic strip) का थर्मोस्टैट्स में प्रयोग हम जानते हैं कि हर धातु गर्म होने पर प्रसारित होती है, पदार्थों के इस गुण को तापीय प्रसार कहा जाता है। अब प्रसार की मात्रा विभिन्न पदार्थों के लिए अलग-अलग होती है और यह पदार्थों के गुण, तापीय प्रसार गुणांक (γ) द्वारा निर्धारित की जाती…
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उत्प्लावन बल पर तापमान का प्रभाव उत्प्लावन बल पर तापमान का प्रभाव :- हम जानते हैं कि जब भी किसी ठोस वस्तु को किसी द्रव में आंशिक रूप से या पूर्ण रूप से डुबोया जाता है, तो हवा में उसके वजन की तुलना में द्रव में इसका वजन कम प्रतीत होता है। इसका…
तापीय प्रसार पर संख्यात्मक प्रश्न प्रश्न (1). 25 सेमी लंबाई की एक धातु की छड़ A का तापमान, जब 0 डिग्री सेल्सियस से 100 डिग्री सेल्सियस तक बढ़ाया जाता है, तो इसकी लम्बाई में वृद्धि 0.05 सेमी होती है। तापमान में समान वृद्धि के लिए 40 सेमी लंबाई की एक अन्य छड़ B…
Form of Coulomb’s Law when Dielectric is filled partially between the charges Coulomb’s Law with partially filled Dielectric between the charges :- Suppose two charge particles q1 and q2 are placed r distance apart in vacuum, then from Coulomb’s Law force acting between them:- Now let a dielectric medium ( of permittivity εr…
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COP(Heat Pump)=COP(Refrigerator)+1 Heat PUmp: Heat pump is a device that transfers heat from a colder area to a hotter area by using mechanical energy, as in a refrigerator. In heat pump how much heat is rejected at higher temperature is an important quantity. Coefficient of performance of Heat Pump ⇒ ∴ ……….(1) Refrigerator:…
Coulomb’s Law Coulomb’s Law :- On the basis of experiments, Coulomb established the following law known as Coulomb’s law. The magnitude of electrostatic force between two point charges is (i) directly proportional to the product of charges and (ii) inversely proportional to the square of the distance between them. i.e. and ⇒…
Methods of Charging of a body The different methods of Charging of a body are :- (a) friction, (b) conduction, (c) induction, (d) thermionic ionization or thermionic emission (e) photoelectric effect and (f) field emission. (a) Charging by Friction : When a neutral body is rubbed against other neutral body then some electrons…
Properties of Electric Charge Properties of Electric Charge :- (i) Charge is a scalar quantity : It adds algebraically and represents excess, or deficiency of electrons. (ii) Charge is of two types : (a) Positive charge and (b) Negative charge Charging a body implies transfer of charge (electrons) from one body to another….
Electric Charge Charge of a material body or particle is the property (acquired or natural) due to which it produces and experiences electrical and magnetic effects. Some of naturally charged particles are electron, proton, α-particle etc. Charge is a derived physical quantity. The S.I. unit of Charge is coulomb. In practice we use…
Difference between Heat Engine Heat Pump and Refrigerator In this article we are going to have detailed study of difference between Heat Engine Heat Pump and Refrigerator. Heat Engine: Heat engine is a device which converts heat energy into mechanical work. In heat engine how much work is extracted from a given amount of heat…
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