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Voltmeters:
Voltmeters are used to measure emf's and more commonly potential differences. The two probes of the meter are therefore connected to the two points between which the potential difference is required.
If the potential at A with respect to B is required, the red lead is connected to point A, the black lead point B.If the potential at B with respect to A is required, the red lead is connected to point B, the black lead point A.If the potential between a point and Earth or ground is required. The red lead is connected to the point and the black lead is connected to ground or Earth.
Photons and gravity : It is observed that light is affected by gravity. We can recognize the gravitational behaviour of light from the fact that although a photon has zero rest mas
A rectangular rosette is mounted on a test structure as shown, loads are applied, and the following strains are measured by strain gage elements 1, 2, and 3: ε 1 = 1500 μm/ m ε
With all the limitations, what are the uses of fiber optics? There is an ordinary misconception about the quantity of light required for a given task: more light is not essenti
(i) It having of dissimilar bright lines. (ii) It is given by an excited source in atomic state. (iii)E.g. Spectrum of excited helium, mercury vapours sodium vapours or atomi
Construction of UJT The fundamental structure of a UJT is illustrated in fig. (a). It comprises an n-type silicon bar that is lightly doped. Two end connections are taken fr
ISOLATED SYSTEM: "When a number of bodies are like that they can exert force upon one another and no external agency exerts a force on them, they are said to form an isolated s
Red light (λ = 685 nm) falls on a slit that is 0.025 mm wide. The distance between the centers of the central bright band and the second-order dark band is 6.3 cm. What is
Illustrate Gibbs - Helmoltz equation. What are its applications? A Heat engine operating between temperatures 300 K and 500 K rejects 6 Kcal of heat to the sink. How much heat i
As shown in the figure below, a source at S is sending out a spherical wave: E 1 =(A ×D/r) cos( wt-2πr/ λ) ; where r is the distance to source S. In addition, there is anoth
Is stone take longer for the downward motion than for the upward motion Consider a stone thrown vertically upward. if we take friction against air into account, we see that the
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