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Two stars of masses m and 2 m at a distance d rotate about their common centre of mass in free space. The period of revolution is:

A

B

C

D

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Exploration 24.1: Flux and Gauss's Law Select a Detector to Begin Green Surface Red Surface Blue Surface In this Exploration, we will calculate the flux through three Gaussian surfaces: green, red, and blue (position is given in meters and electric field strength is given in newtons/coulomb). Note that this animation shows only two dimensions of a three-dimensional world. You will need to imagine that the circles you see are spheres. Restart. Flux is a measure of the electric field through a surface. It is given by the following equation: Flux = E * A * cosθ where E is the electric field, A is the unit area normal to the surface, and θ is the angle between the electric field vector and the surface normal. Move the test charge along one of the Gaussian surfaces. You must imagine that it is a sphere, even though you can only see a cross-section of it. a. What is the magnitude of the electric field along the surface? b. In what direction does it point? c. What direction is normal to the Gaussian surface? If the electric field (E) and the normal to the Gaussian surface (A) always point in the same direction relative to each other, and the electric field is constant, then the equation for flux becomes: Flux = E * A * cosθ d. In the case of the point charge in a-c, what is the angle between the electric field and the normal to the surface? This means that cosθ = 1. Therefore, for this case, Flux = E * A. e. Calculate the flux for the surface you've chosen (remember that the surface area of a sphere is 4πR^2). f. Calculate the flux for the other two surfaces. Because the electric field decreases as 1/r but the area increases as 2, the flux is the same for all three cases. This is the basis of Gauss's law: The flux through a Gaussian surface is proportional to the charge within the surface. With twice as much charge, there is twice as much flux. Gauss's law says that Flux = Gen * cosθ. g. What is the magnitude and sign of the point charge? Download PDF Worksheet
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Question Text
Two stars of masses m and 2 m at a distance d rotate about their common centre of mass in free space. The period of revolution is:
Updated OnMar 8, 2023
TopicSystem of Particles and Rotational Motion
SubjectPhysics
ClassClass 11
Answer TypeText solution:1 Video solution: 5
Upvotes604
Avg. Video Duration10 min