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Syllabus

what is the meaning of quantisation of charge?

what is N=nNa

_{0}?Ans. is A

Explain

Difference between gravitational force and electrostatic force

what is the dimensional formula of epsilon not?

Two similarly and equally charged identical metal spheres A and B repel each other with a force of 0.000002 N. A third identical sphere C is touched with A and then placed at the mid point between A nd B. What is the net electric force on C?

Explain the formulae E = Sigma / Epsilon not.

E is the electric field vector.

Epsilon not is the specific inductive capacity or relative permittivity of vaccum.

Sigma = ? (doubt)

Three point charges of +2 microcoulomb,-3 microcoulomb and -3 microcoulomb are kept at the vertices A,B and C respectively of an equilateral triangle of side 20 cm.What should be the sign and magnitude of the charge to be placed at the mid point(M) of side BC so that the charge at A remains in equilibrium?

Calculate charge on

_{26}Fe^{56}nucleus ?A charge q is placed at the center of the line joining two equal charges Q. Show that the system of three charges will be in equilibrium if q = -Q/4.

what is mean by atomicity of charge?

derive an expression for potential energy of an electric dipole in a uniform electric field .

Electric field strength, E=V/r what is V and r

An infinite number of charges each equal to q are placed along x axis at x=1 , x=2 , x=4, x=8 and so on . Find the electric field at the point where x=0 due to this setup of charges and what will be the electric field if inthe above setup the consecutive charges have opposite sign.?

what does q1+q2 =0 signify in electrostatics?

what is the work done by an electric field in rotating a dipole from its unstable equilibrium to stable equilibrium? does the energy of dipole increase or decrease in this process why?

difference between uniform and non-uniform electric fields.... plzz if possible draw diagrams too..!

a gas is heated through 1 degree celsius in a closed vessel. its pressure is increased by 0.4%.the initial temperature of the gas is ????

A charge "q" is placed at the centre of the cube of side "l". What is the electric flux passing through each face of the cube?

Pls provide chart for values of Sin, Cos, Tan and Cot for specific values from 30 degrees to 360 degrees.

Â What is quantisation of charge?

What are the limitations of Coulomb's Law ?

A pendulum bob of mass of 80 mg and carrying a charge of 2 X 10

^{-}^{8}C is at rest in a horizontal uniform electric field of 20,000 V/m. Find the tension in the thread of the pendulum and the angle it makes with the vertical.Take( g = 9.8ms

^{-2})^{2})A) work done by friction force on block B is zero in time interval t = 0 to t = 3s.

B) work done by friction force on block A is zero in time interval t = 0 to t = 3s.

C) work done by tension on B is also zero in time interval t = 0 to t = 3s.

D) speed of blocks at t = 10s is 27.5 m/s.

Four charges, each equal to Q are placed at the 4 corners of a square and a charge q is placed at the centre of the square. If the system is in equilibrium, then the value of q is?

^{6 }Nm^{2}/C.No links plstwo equal point charges A and B are R distance apart. A third point charge placed on the prependicular bisector at a distance 'd' from the center will experience maximum electrostatic force when

1. d = R/2 X 1.414

2 d = R/ 1.414

3. d = R 1.414

4. d = 2 X 1.414 R

a) q1/q2 = 1 c) q1/q2 <= 1

b) q1/q2 < 1 d) q1/q2 >= 1

Three charges each equal to q are placed at the three corners of a square of side a. Find the electric field at the fourth corner.

when a body becmes negatively charged , its mass

[a] decreases [b] increases

[c] remins the same [d] none of these

Solve this:You throw a ball with a launch velocity of $\overrightarrow{v}=\left(3\hat{i}+4\hat{j}\right)$ m/s towards a wall, where it hits at height h

_{1}. Suppose that the launch velocity were instead $\overrightarrow{v}=(5\hat{i}+4\hat{j})$ m/s. If h_{2}_{ }is height then:$\left(a\right){h}_{2}={h}_{1}\left(b\right){h}_{2}{h}_{1}\phantom{\rule{0ex}{0ex}}\left(c\right){h}_{2}h1\left(d\right)unanswerable$

q. Two point charges of +16 micro coulomb and -9 micro coulomb are placed 8 cm apart in air .Determine the position of the point at which the resultant field is zero .

Two small balls having equal positive charge q coulomb are suspended by two insulating strings of equal length ' l ' meter from hook fixed to stand.The whole setup is taken in a satellite into sapce where there is no gravity. What is the angle between the two strings and the tension in each string?

Q: two spheres of charges +10C&+40C are placed 0.12m apart.find the position of the point ,between them ,where the force on a charge "q" is zero?

ans -0.04m from +10C

PLZ TELL ME HOW THE ANSWER IS 0.04m FROM +10C?

MY ANSWER DIFFERS FROM IT.

an electric dipole of dipole moment 20 *10

^{-6}Cm is enclosed by a closed surface .what is the net flux coming out of the surface?24. A block of mass 3kg is connected with two identical massless springs A and B and a block mass 2kg is hanging with a third identical spring C as shown in figure then the magnitude of acceleration of 3kg and 2kg block just after cutting the spring A

2 point charges at distance ' r ' in air exert a force ' F ' on each other, at what distance will these charges experience the same force ' F' in a medium of dielectric constant K?

what is the source charge and test charge

two fixed point charges +4e and +e units are separated by a distance a .where should the third point charge be placed for it to be in equilibrium ?

how much positive and negative charge is there in a cup of water

Two infinitely long parallel wires having linear charge densities λ1 and λ2 respectively are placed at a distance of R metre. The force per unit length on either wire will be.......?

_{1}, Q_{2}, Q_{3}, respectively. It is found that the surface charge densities on the outer surfaces of the shells are equal. Then, the ratio of the charges given to the shells, Q_{1}: Q_{2}: Q_{3}is : (1) 1 : 2 : 3 (2) 1 : 3 : 5 (3) 1 : 4 : 9 (4) 1 : 8 : 18what is the principle of vernier calipers

straight wire are E1 or E2 respectively. The ratio of E1 and E2 will be?

(A) 1/2 (B) 2/1 (C) 1/1 (D) None of these

electrostatic field lines cannot be discontinuous why?

A stream of electrons travelling with speed of v m/s at right angles to a uniform electric field E is deflected in a circular path of radius r.Prove that e/m =v2 /rE ?

An electron falls through a distance of 1.5 cm in a uniform electric field of magnitude 2.0 Ã— 10

^{4}N C^{â€“1}in the direction of the field . Then the direction of the field is reversed keeping its magnitude unchanged and a proton falls through the same distance . compute the time of fall in each case.(ii) P and R

R

P

What will happen when object made of substance Q is rubbed against an object made of substance R?

(1) Q becomes positively charged; R becomes positively charged

(2) Q becomes positively charged; R becomes negatively charged

(3) Q becomes negatively charged; R becomes positively charged

(4) Q becomes negatively charged; R becomes negatively charged

state Gauss' law in electrostatics.

why is coulombs law applicable only to point charges?

project to study various factors on which the internal resistance emf of a cell depends

^{4 }m/s?Find (i) the force on the charge at the centre of shell and at the point A. (ii) the electric flux through the shell.

State and prove

.Gauss TheoremA capacitor of 10 microfarad is charged to a potential difference of 20v. if it is discharged in 0.2s , the average current during dischrging is:

rna.1mA c.4mA

rnb.2mA d.0.5mA

What is the angle between the directions of electric field at any 1) axial point 2) equatorial point due to an electric dipole ?

What is the amount of work done in moving a 200 nC charge between two points 5 cm apart on an equipotential surfaces?

what are the physical significance of electric field??

what is the line of symmetry of dipole field?

the sum of two point charges is 7uC. they repel each other with a force of 1N when kept 30cm apart in free space. calculate the value of each charge.

If E=6i+3j+4k, calculate the electric flux through a surface of area 20 units in the YZ plane.

HOW TO DO THIS QUESTION?

The electric field components due to a charge inside the cube of side 0.1 m are as shown:

Where α = 500 N/C − m

E_{y}= 0,E_{z}= 0Calculate (i) the flux through the cube and (ii) the charge inside the cube

explain cyclotron in a more elaborate way

A certain charge Q is divided into two parts q and Q-q which are then seperated by a certain distance.What must q be iin terms of Qto maximise the electrostatics repulsion between the two charges?

Force exerted by a uniform electric field on an electron having mass m1 and proton of mass m2 are represented as F1 and F2 are related as

3.6 x 10 5 N when AB = 0.12m. What is the force of repulsion if AB is increased to

a) 0.24 m b) 0.36 m

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

a car moving with a speed of 40km/hr can be stopped by applying brakes after at least 2m.If the same car is moving with 80km/hr.What is the least stopping distance?

a semi infinite line charge of linear charge density 'D' has the shape of an infinitely long straight wire whose one end is connected to three-fourth circle of radius 'R' while one of the diameters of 3/4th circle is parallel to the infinitely long straight part.What is the field at the centre of the circle.How?

Do relative permittivity and dielectric constant of a medium imply different physical quantities?

Three particles each of mass 1g and carryig a charge 'q' are suspendedfrom a common point by insulated massless strings, each 1oo cm long.If the particles are in equilibrium and are located at the corners of an equilateral triangle of sides of length 3cm,calculate the charge 'q' on each particle.{g=10 m/s^2}