Recent questions tagged chapter16

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Show does the force between two point charges change if the dielectric constant of the medium in which they are kept

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A charged rod P attracts rod R where as P repels another charged rod Q. What type of force is developed between Q and

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A free proton and a free electron are placed in a uniform field. Which of the two experience greater force and greater

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No two electric lines of force can intersect each other?

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A particle of mass m and charge q is released form rest in a uniform electric field of intensity E. calculate the kinetic energy it attains after moving a distance s between the

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Two point charges +q and +9q are separated by a distance of 10 a. Find the point on the line joining the two changes where electric field is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Define the term dipole moment `vecP` of an electric dipole indicating its direction. Write its S.I unit. An electric dipole is placed in a uniform electric field `vecE` . Deduce the expression for the Torque acting on

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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(1) The electric field `vecE` due to a point change at any point near to it is defined as: `vecE=Lim vecF/q`where q is the test charge and `vecF` is the force acting on it. What is the significance of lim `qtoo` in this expression?(2) Two charges each `2 xx 10^(-7)` C but opposite in sign forms a system. These charges are located at points A (0,0, -10) cm and B(0,0, +10) cm respectively. What is the total charge and electric dipole moment of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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(a) Sketch electric lines of force due to (i) isolated positive change (ie q>0) and(ii) isolated negative change ( ie q(b) Two point changes q and –q are placed at a distance 2a apart. Calculate the electric field at a point P situated at a distance r along the perpendicular bisector of the line joining the charges. What is the field when r >>

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Which physical quantity has its S.I unit (1) Cm (2)

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Define one

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The graph shows the variation of voltage V across the plates of two capacitors A and B versus increase of charge Q stored on them. Which of the two capacitors have higher capacitance? Give reason for your answer?

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electric dipole when held at `30^0` with respect to a uniform electric field of `10^4 N/C` experienced a Torque of `9 x 10^(-26) Nm`. Calculate dipole moment of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A sphere of radius `r_1` encloses a change Q. If there is another concentric sphere S2 of radius `r_2 (r_2 > r_1)` and there is no additional change between S1 and S2. Find the ratio of electric flux through S1 and

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Electric charge is uniformly distributed on the surface of a spherical balloon. Show how electric intensity and electric potential vary (a) on the surface (b) inside and (c)

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two point electric charges of value q and 2q are kept at a distance d apart from each other in air. A third charge Q is to be kept along the same line in such a way that the net force acting on q and 2q is zero. Calculate the position of charge Q in terms of q and

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(a) What is an equi-potential surface? Show that the electric field is always directed perpendicular to an equi-potential surface. (b) Derive an expression for the potential at a point along the axial line of a short electric

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Why does the electric field inside a dielectric decrease when it is placed in an external electric

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What is the work done in moving a 2 µ C point change from corner A to corner B of a square ABCD when a 10 µ C charge exist at the centre of the

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Show mathematically that the potential at a point on the equatorial line of an electric dipole is

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