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Shifa asked a question
Subject: Physics, asked on on 26/8/16
Figure shows three concentric metallic spherical shells. The outermost shell has charge q2, the inner most shell has charge q1, and the middle shell is uncharged. The charge appearing on the inner surface of outermost shell is


(1) q1 + q2                  (2) q22            (3) –q1
Almas asked a question
Subject: Physics, asked on on 2/3/17
When a test charge is brought in from infinity along the perpendicular bisector of an electric dipole, the work done is zero. How ?
Akshat Manral asked a question
Subject: Physics, asked on on 25/4/17
Electric potential in an electric field is given as V=K/r,if position vector r=2i+3j+6k the electric field will be
Hrishikesh asked a question
Subject: Physics, asked on on 17/4/18
Two concentric rings, one of radius a and oother of radius b have the charge +q and -(2/5) raised to -3/2 q respectively as shown in fig.find the ratio b/a if a charge particle placed on yhe axis at z=a is in equilibrium.
Prithesh Dwivedi asked a question
Subject: Physics, asked on on 15/7/17
5) The given figure shows two infinite lines of charge having equal (in magnitude) linear charge density but with opposite sign. The electric field at any point on x axis (for x > 0) is along the unit vector .
(A) cos θ i^+sin θ j^(B) i^(C) j^(D) -sin θ i^+sin θ j^
Hrishikesh asked a question
Subject: Physics, asked on on 17/4/18
Four point charges are kept at the vertices of a regular tetrahedron of side R.Total electrostatic energy of the configuration is alphakqsquare /R .The value of alpha is...
Bhavya Arora asked a question
Subject: Physics, asked on on 15/6/18
Derivation of electric field due to finite line charge
Tanmaiyee Reddy asked a question
Subject: Physics, asked on on 17/7/17
two spherical conductors a1 and a2 of radii r1 and r2 are concentrically placed in air.The two are connected by a copper wire. Then the equivalent capacitence of the system is?
Dhruvin Pandya asked a question
Subject: Physics, asked on on 11/5/19
In an arrangement of two concentric conducting shells, with centre at origin and radii a and b(a < b), charges Q1 and Q2 are given to inner and outer shell, then the potential V at a distance r from the origin is (r < a)
A) kQ1/A + kQ2/b
B) KQ1/r + kQ2/a
C) KQ1/a + KQ2/r
D) k(Q1+Q2)/r
Dhruvin Pandya asked a question
Subject: Physics, asked on on 11/5/19
The variation of potential with distance R from a fixed point is as shown below. A charge -qis put atR = 3mand released. The charge will

Graphic
Dhruvin Pandya asked a question
Subject: Physics, asked on on 18/6/19

Which of the following statement is false for a perfect conductor in electrostatic condition?

Options:

The surface of the conductor is an equipotential surface.

The electric field lines just outside the surface of a conductor is perpendicular to the surface.

The electric field is continuous across the surface of conductor.

The electric field is discontinuous across the surface of conductor.
Avika . asked a question
Subject: Physics, asked on on 15/6/18
Work done in moving a unit positive charge over a closed path in an electric field is zero . What does this statement means ?how in a closed path electric field is zero? Please don't send any link
Riya Gaurav asked a question
Subject: Physics, asked on on 23/5/17
A charged air capacitor has stored energy U. What will be the energy stored when air is replaced by a dielectric of dielectric constant K, charge Q remain the same
Almas asked a question
Subject: Physics, asked on on 5/4/17
Two capacitors rated 600 pF, 4kV and 300 pF, 6kV can work in series up to the potential of 
a) 10 kV
b) 9 kV
c) 6 kV
d) 4 kV
Amaan Laskar asked a question
Subject: Physics, asked on on 17/6/16
​​what is steady state condition in a circuit of capacitors
Guna Shekar asked a question
Subject: Physics, asked on on 4/5/17

An electric dipole of moment p is placed in a position of stable equilibrium in a uniform electric field of intensity E.

What amount of work will be done if the dipole is rotated through an angle θ from its initial position?
Prithesh Dwivedi asked a question
Subject: Physics, asked on on 8/6/17
Q: A Point  charge  q is located at a  distance ‘r’ from the center ’o’ of an uncharged conducting spherical  shell of inner radius R1 and outer radius R2 respectively.(r<R1). Assume  potential  to be  zero at infinity.
a) The potential  at point ‘O’ is  b)Electric potential  of the conductor  is  c) Electric potential  at a point outside the shell at a distance  r0 from  center of shell
Ritu Kumar asked a question
Subject: Physics, asked on on 3/6/17
the potential energy of two like charges (q1 q2 >0) is positive.As the electrostatic force is repulsive ,so a +ve amount of work has to be done against this force to bring the charges from infinity to finite sepration PLEASE EXPLAIN THIS PARAGRAPH and please tell what this (q1 q2 >0) mean here.
Guna Shekar asked a question
Subject: Physics, asked on on 8/10/17
Please give a clear solutions with all steps
Q. Four hollow concentric conducting spheres of radii R, 2R, 3R and 4R are having charges - 1 μC, 2 μC, - 3 μC, and + 4μC respectively. If the spheres of radii 2R and 3R are connected with a metallic wire, then the charge transferred between the spheres is
A) 0 μC
B) 0.5 μC
C) 1 μC
D) 3 μC
Manideep Varma asked a question
Subject: Physics, asked on on 22/11/16
​ please answer quickly
Mayank Deshpande asked a question
Subject: Physics, asked on on 26/6/17
 A dielectric slab whose dielectric constant varies by the function K(x)=x^2+2x+1  where X is the displacement from the first plate of The parallel plate capacitor which also bears a positive charge Q and the capacitor has a capacitance C, when no dielectric was inserted between the two parallel plates. Then calculate the final capacitance of the capacitor. Badly need the answer so thank you
Nevadhya asked a question
Subject: Physics, asked on on 14/6/17
I am confused a lot in the application of Kirschoff's Loop Law for capacitors and resistors, I am confused in the part that sometimes when we move in loop, we take q/c as negative and sometimes +ve, what's the catch here is it related to direction of flow of charges, current or what? Please reply quickly 
Yatharth asked a question
Subject: Physics, asked on on 5/5/18
What will be the value of Electric field and potential at the centroid of equilateral if we place charges 2q, –q and -q at the vertices of the equilateral triangle?
Ritu Kumar asked a question
Subject: Physics, asked on on 5/6/17
effect of dielectric on capacitance please derive this by explaining also in simple language
Sandali Khare asked a question
Subject: Physics, asked on on 6/10/17
Name the materials in which on increasing temperature resistivity increases and decreases.
Sandali Khare asked a question
Subject: Physics, asked on on 13/1/18
Electric field in a region is zero. Does it necessarily mean potential is also zero there. Explain.
Tanay Vijay asked a question
Subject: Physics, asked on on 4/6/17
Sir,
In the starting of lecture u made a graph between -9Q & +4Q of electric field and r .
I have no understood the graph possible for -ve electric field means below -9q and +4q
Area under yellow box
Sai Prasad B asked a question
Subject: Physics, asked on on 19/5/17
Pls answer this:
Two point charges +2q and -4q are fixed at points A(2,0,0)m and B(8,0,0)m. A spherical surface of radius 4m is centered at the origin. Show that every point on spherical surface is at zero potential.
Dhruvin Pandya asked a question
Subject: Physics, asked on on 18/6/19
The charge stored on 3F capacitor, shown in figure is
Ritu Kumar asked a question
Subject: Physics, asked on on 5/6/17
explain this para ( for a capacitor to store latrge amount of charge without leaking, its capacitance should be high enough so that the potential difference and hence the electric field do not exceed the break-down limits.
Almas asked a question
Subject: Physics, asked on on 5/4/17
If work done by electrostatic force on a system of point charges is positive, then potential energy of system will
​a) increase
b) decrease
c) remain constant
d) may increase or decrease
Subhendu Gorai asked a question
Subject: Physics, asked on on 7/4/17
Why deflection between two gold leaf electroplate of a electroscope remain same if we measure the outer surface of a conductor .As we know that surface of a conductor is equipotential plane. But the charge on the conductor differ from point to point .
Ranjitha R asked a question
Subject: Physics, asked on on 17/4/18
sir suppose for an electrostatic potential if potential energy of refernce pt is at infinty is 0 then what will be the kinetic energy fr the same point
Aastha Adhikari asked a question
Subject: Physics, asked on on 9/9/20
Using suitable diagram ,show that it does not undergo any translatory motion, and
Derive an expression for the torque acting on it and specify its direction. When is this torque maximum?
Amisha asked a question
Subject: Physics, asked on on 12/4/17
DIELECTRIC CONSTANT IN TERMS OF CAPACITOR
Jasmine S asked a question
Subject: Physics, asked on on 3/4/17
SIR, IN THE STUDY MATERIAL THERE WERE FEW PRACTISE QUESTIONS , IN COULOMB'S LAW. IN THE 2ND PROBLEM THERE IS AN EQUATION, i.e..,

F = T cos0. but what means it is taken so....
Nalin Philip asked a question
Subject: Physics, asked on on 22/5/21
wo fixed, identical conducting plates (a and P), each of surface area .S’ are charged to -Q and q, respectively, where Q > q >0. A third identical plate (j), free to move is located on the other side of the plate with charge q at a distance d (figure). The third plate is released and collides with the plate p. Assume the collision is elastic and the time of collision is sufficient to redistribute charge amongst p and y
(a) Find the electric field acting on the plate y before collision.
(b) Find the charges on P and yafter the collision.
(c) Find the velocity of the plate yafter the collision and at a distance d from the plate /?.
Amisha asked a question
Subject: Physics, asked on on 12/4/17
RELATION BETWEEN ELECTRIC SUSEPTIBILITY AND DI ELECTRIC CONSTANT
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