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THINK BRIGHT CLASSES, , Test - Electrostatic (unit -1), , 1- A body has 1 coulomb of negative charge . How much electron in excess?, , 2- Can we charge a body which is in contact with earth?, , 3- Write SI unit and dimensional formula of (a) linear charge density,(b) surface, charge density and (c)volume charge density?, , 4- The dielectric constant of water is 80. What is permittivity?, , 5- Electric field lines do not cut each other why?, , 6- Is electric dipole moment a scalar or vector quantity? if it is a vector, quantity what is its direction?, , 7- What is relationship between electric flux and electric field?, , 8- If a +q charge is placed inside a spherical surface, what will be the flux, coming out of the surface?, , 9- The net outward flux coming out of closed surface is zero. On the basis can, we interpret that there is no charge inside the surface?, , 10- Four charge 3q .-2q, q . 2q lying inside gaussian surface , calculate net, electric flux diverging from this gaussian surface?, , 11- Write the name of two dieletric material which are used in capacitor?, , 12- If we touch the wire of a charged capacitor , we get electrical shock why?, 13- Write dimensional formula of 1/2eE? ., , Derivation, , 1- Define electrical dipole moment. Find the electrical field at a point due to an, electrical dipole in axial position?, , 2- How can calculate electrical field intensity due to this using coulomb's law?, 3- What is area vector and Electric flux and also write its dimension unit and, formula?, , 4- Write Gauss theorem and also prove that?, , 5- Electric field due to an infinite line of charging using gauss theorem?, Numerical, , 1- What will be charge on 75 kg mass of electron?, , 2- Ina uniform electric field of (51+10}) N/C a surface of areavector(0.2]) m?is, kept. Find the flux passing through the surface ?, , 3- Two point charge q, & q2 are placed on x axis at position, respectively. if a third charge +Q, placed at position x=+a/2, then calculate q1/q2?, , -aand x=+a, brium,