Questions by varun

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If `oint_0^1 vec E cdot vec (ds)=0` over a surface,

asked Mar 20, 2022 in 12th Physics

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The Electric field at a point

asked Mar 20, 2022 in 12th Physics

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If there were only one type of charge in the universe,

asked Mar 20, 2022 in 12th Physics

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Consider a region inside which there are various types of charges but the total charge is zero. At points outside the

asked Mar 20, 2022 in 12th Physics

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Refer to the arrangement of charges in Fig. and a Gaussian surface of radius R with Q at the centre.

asked Mar 20, 2022 in 12th Physics

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An arbitrary surface encloses a dipole. What is the electric flux through this

asked Mar 20, 2022 in 12th Physics

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A metallic spherical shell has an inner radius R1 and outer radius R2. A charge Q is placed at the centre of the spherical cavity. What will be surface charge density on the inner

asked Mar 20, 2022 in 12th Physics

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A metallic spherical shell has an inner radius R1 and outer radius R2. A charge Q is placed at the centre of the spherical cavity. What will be surface charge density on the outer

asked Mar 20, 2022 in 12th Physics

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The dimensions of an atom are of the order of an Angstrom. Thus there must be large electric fields between the protons and electrons. Why, then is the electrostatic field inside a conductor

asked Mar 20, 2022 in 12th Physics

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If the total charge enclosed by a surface is zero, does it imply that the elecric field everywhere on the surface is zero? Conversely, if the electric field everywhere on a surface is zero, does it imply that net charge inside is

asked Mar 20, 2022 in 12th Physics

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Sketch the electric field lines for a uniformly charged hollow cylinder shown in Fig

asked Mar 20, 2022 in 12th Physics

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What will be the total flux through the faces of the cube (Fig. ) with side of length a if a charge q is placed at (I) A: a corner of the cube.(II) B: mid-point of an edge of the

asked Mar 20, 2022 in 12th Physics

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What will be the total flux through the faces of the cube (Fig. ) with side of length a if a charge q is placed at (I) C: centre of a face of the cube.(II) D: mid-point of B and

asked Mar 20, 2022 in 12th Physics

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A paisa coin is made up of Al−Mg alloy and weighs 0.75g. It has a square shape and its diagonal measures 17mm. It is electrically neutral and contains equal amounts of positive and negative charges. Treating the paisa coins made up of only Al, find the magnitude of an equal number of positive and negative

asked Mar 20, 2022 in 12th Physics

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Fig. represents a crystal unit of cesium chloride, CsCl. The cesium atoms, represented by open circles are situated at the corners of a cube of side 0.40nm, whereas a Cl atom is situated at the centre of the cube. The Cs atoms are deficient in one electron while the Cl atom carries an excess electron.(a) What is the net electric field on the Cl atom due to eight Cs atoms?(b) Suppose that the Cs atom at the corner A is missing. What is the net force now on the Cl atom due to seven remaining Cs

asked Mar 20, 2022 in 12th Physics

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Two charges q and –3q are placed fixed on x-axis separated by distance ‘d’. Where should a third charge 2q be placed such that it will not experience any

asked Mar 20, 2022 in 12th Physics

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Fig. shows the electric field lines around three point charges A, B and C. (a) Which charges are positive? (b) Which charge has the largest magnitude?

asked Mar 20, 2022 in 12th Physics

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Fig. shows the electric field lines around three point charges A, B and C. In which region or regions of the picture could the electric field be zero? Justify your answer. (i) near A, (ii) near B, (iii) near C, (iv)

asked Mar 20, 2022 in 12th Physics

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Five charges, q each are placed at the corners of a regular pentagon of side ‘a’ (Fig.).

asked Mar 20, 2022 in 12th Physics

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Consider a sphere of radius R with charge density distributed as ρ (r ) = ≤ kr r R for = > 0 for r R .(a) Find the electric field at all points r.(b) Suppose the total charge on the sphere is 2e where e is the electron charge. Where can two protons be embedded such that the force on each of them is zero. Assume that the introduction of the proton does not alter the negative charge

asked Mar 20, 2022 in 12th Physics

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