Call me

Have a Query? We will call you right away.

+91

E.g: 9876543210, 01112345678

We will give you a call shortly, Thank You

Office hours: 9:00 am to 9:00 pm IST (7 days a week)

What are you looking for?

Syllabus

how does the angle of dip vary from equator to poles?

Two substances of densities P

_{1}and P_{2 }are mixed in equal volume and the relative density of mixture is 4. When they are mixed in equal masses, the relative density of the mixture is 3. The values of P_{1 }and P_{2 }are........What are the properties of

?Electric Lines of ForceThe half â€“life of a radioactive substance is 30 s. Calculate:(i ) the decay constant, and(ii) Time taken by the sample to decay 3/4 of its initial value.What is Ohm's law in vector form.........???

39. A light cylindrical vessel is kept on a horizontal surface. Its base area is A. A hole of cross sectional area $\frac{A}{4}$ is made on side wall just at its bottom. Minimum coefficient of friction such that it does not

Slide due to impact force of emerging liquid is.

$\left(1\right)\mu =\frac{1}{4}\left(2\right)\mu =4\left(3\right)\mu =\frac{1}{2}\left(4\right)\mu =\frac{1}{8}$

derive an expression for the total work done in rotating an electric dipole through an angle theta in a uniform electric field.

(a) V' - V/V' +V

(b) V' - V/V

(c) V' - V/ V'

(d) V - V'/V'

Two capacitors C1 and C2 are charged to potential V1 and V2 resp. and then connected in parallel. Calculate common potential, charge on each capacitor and energy in the system after connection??

43.A particle is thrown with kinetic energy k straight up a rough inclined plane of inclination $\alpha $ and coefficient of friction $\mu $. The work done against friction before the particle comes to rest is$\left(1\right)\frac{k\mu sin\alpha}{\mathrm{cos}\alpha +\mu \mathrm{sin}\alpha}\left(2\right)\frac{k\mu \mathrm{cos}\alpha}{\mathrm{cos}\alpha +\mu \mathrm{sin}\alpha}\phantom{\rule{0ex}{0ex}}\left(3\right)\frac{k\mu sin\alpha}{\mathrm{sin}\alpha +\mu \mathrm{cos}\alpha}\left(4\right)\frac{k\mu cos\alpha}{\mathrm{sin}\alpha +\mu cos\alpha}$

Find the expression for the capacitance of a parallel plate capacitor of area A and plate separation d if

i) a dielectric slab of thickness t, and

ii) a metllic slab of thicknes t

(where t<d) are introduced one by one between the platesof the capacitor. In which case would the capacitance be more and why?

Two point charges of +3x10

^{-8}C and -2x10^{-8}C are located 15 cm apart in air. Find at what point on the line joining these charges the electric potential is zero. Take potential at infinity to be zero.An electic dipole of length 2cm is placed with its axis making an angle 60 degree with respect to a uniform electric field of 10

^{5}N/C. If it experiences a torque of 13.856 Nm, calculate the- magnitude of the charge on the dipole & PE of the dipole.Charge q is uniformly distributed over a thin half ring of radius R .The electric field at the centre of the ring is?A capacitor of capacitance C is charged to a potential difference V0. The charging battery is disconnected and the capacitor is connected to a capacitor of unknown capacitance Cx. The P.D. across the combination is V. The value of Cx should be

WHAT ARE THE PROPERTIES OF EQUIPOTENTIAL SURFACES ?????????

Q. Calculate the equivalent capacitance between points A and B in the circuit below .If a battery of 10 V is connected across A and B , calculate the charge drawn from the battery by the circuit .

A parallel plate capacitor is charged by a battery. After sometime the battery is disconnected and a dielectric slab of dielectric constant K is inserted in between the plates. How would i) The capacitance ii) The electric field between the plates and iii) The energy stored in the capacitor be affected? Give reasons with necessary equations.

_{1 },q_{2,}q_{3}are in line at equal distances q_{2 }and q_{3}are in sign .Find the magnitude and sign of q_{1 },if the net force on q_{3}is zero.K(x) = K

_{0}+ Bx ( B = constant )the capacitance C of this capacitor would be related to its vacuum capacitance C

_{0}as per the relation ??An electric dipole is held in a uniform electric field.

a) Show that the net force acting on it is zero.

b) The dipole is aligned parallel to the field.Find the work done in rotating through angle of 180 degree

ChargeQ is distributed over two concentric hollow spheres of radii R1 and R2 (R2>R1) such that the surface charge densities areequal. Find the electric potential at the common centre.

a non conducting ring of radius 0.5 m carries a total charge of 1.11*10

^{-10}C distributed non uniformly on it's circumference producing electric field E vector everywhere in the space . the value of the line integral ∫ -E. dl ( llower limit =infinity , upper limit = 0) (=0 being at the centre of the ring ) in volts isA spherical conducting shell of inner radius r1 and outer radius r2 has a charge Q. A charge q is placed at the centre of the cell.

(a) What is the surface charge density on the (i) inner surface (ii) outer surface of the shell.

(b) Write the expression for electric field at a point x r2 from the centre of the shell.

Solve this :45. A uniform cylindrical rod of length L, cross-section A and Young's modulus Y is acted upon b the forces as shown in figure. The elongation of the rod is :

$1.\frac{2}{5}\frac{\mathrm{F}}{\mathrm{AY}}2.\frac{3}{5}\frac{\mathrm{F}}{\mathrm{AY}}\phantom{\rule{0ex}{0ex}}3.\frac{3}{8}\frac{\mathrm{F}}{\mathrm{AY}}4.\frac{8}{3}\frac{\mathrm{F}}{\mathrm{AY}}$

Calculate the amount of work done in rotating a dipole, of dipole moment 3 x 10

^{-8}Cm, from its position of stable equilibrium to the position of unstable equilibrium of uniform electric field 10^{4}N/C..Q1.)CALCULATE THE WORK DONE TO DISSOSIATE THE SYSTEM OF THREE CHARGES PLACED ON THE VERTICES OF THE TRIANGLE ABC

HERE q=1.6 * 10

^{-10 }Call side of 10cm ,A=q ,B=2q,C=-4q

lenz law is consequence of the law of conservation of

charge,momentum, mass or energy

plz answer me xperts

Draw 3 equipotential surfaces corresponding to a field that uniformly increases in magnitude but remains constant along z direction.

how are these surfaces different from that of a constant electric field along z direction?

two concentric metallic spherical shells of radii R and 2R are given charges Q1 and Q2 respectively .the surface charge densities on the outer surfaces of the shells are equal .determine the ratio Q1:Q2

Electric potential in an electric field is given by v=K/r ( K=const). If the posiion vector r = 2i + 3j + 6k, the electric field is given by

A) ( 2i + 3j + 6k) / 243

B) (2i + 3j + 6k) / 343

C) (3i + 2j + 6k) / 243

D) (6i + 2j + 6k) 343

Plz do all the proper.

Three identical capacitors C

_{1}, C_{2}and C_{3}of capacitance 6 μF each are connected to a 12 V battery as shown.Find

(i) charge on each capacitor

(ii) equivalent capacitance of the network

(iii) energy stored in the network of capacitors

Two point charges 4 micro coulomb & -2 micro coulomb are seperated by a distance of 1m in air. At what point of line joining the charges is the electric potential zero?

Derive an expression for the energy stored in parallel plate capacitor with air as the medium between its plates . Air is now re placed by dielectric medium of dielectric constants k. How does it charges the total energy of the capacitor if

a ) the capacitor remains connected to the same battery .

b ) the capacitor is disconnected from the battery.

explain the working of VAN DE GRAFF GENERATOR?

E = a [(xi + yj + zk)]/[(x^2 + y^2 + z^2)]^3/2

The electrostatic energy stored between 2 imaginary concentric spherical shells of radii R and 2R with center at the origin is?

[Ans: (pi)ε0 a^2/R ]

A 600 pF capacitor is charged by a 200V supply. It is then disconnected from the supply and is connected

to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process. ?

two identical metal spheres carry charges of +q and -2q.When the spheres are separated by r distance,the force between themis F. Now the spheres are allowed to touch and then moved back to the same.Find the force of repultion between them?

Define dielectric constant in term of capacitance

what is the electric flux

a) through curved surface area

b)through flat surface

Two capacitors, of capacitance 3 micro farad and 6 micro farad are charged to potentials of 2V and 5V respectively. These two charged capacitors are connected in parallel . Find the charge across each of the two capacitors now.

Derivation of electric potential energy of a system of two point charges in the absence of external electric field

A 4 micro farad capacitor charged by 200 volt supply. It is then dissconnected from the supply and is connected to anothe uncharged 2 micro farad capacitor. How much electrostatic energy of first capacitor is lost in the form of heat or e. m radiations?

derivation for energy stored in a capacitor?

^{-2}m, emits beta particles at the rate of 5 x 10^{10}partiCles per sec. The source is electrically insulated. How long will it take for it's potential to be raised by 2 volts, assuming 40% of the emitted beta particles escape the sourceshow that there is always a loss of energy when two capacitors charged to different potentials share charge

Solve this :12. Alpha particle is revolving around an infinitely long line charge of linear charge density $\mathrm{\lambda}$ at perpendicular distance r from it. The centripetal force on the particle is :

$1.\frac{\mathrm{\lambda e}}{2{\mathrm{\pi \epsilon}}_{\circ}\mathrm{r}}2.\frac{\mathrm{\lambda e}}{{\mathrm{\pi \epsilon}}_{\circ}\mathrm{r}}3.\frac{\mathrm{\lambda e}}{4{\mathrm{\pi \epsilon}}_{\circ}\mathrm{r}}4.\frac{\mathrm{\lambda e}}{{\mathrm{\pi \epsilon}}_{\circ}{\mathrm{r}}^{2}}$

the circuit is in series with a at one end and the capacitors connecetd in series

If I consider two metallic charged spheres whose radii are 20cm and 10cm respectively, each having 150 microcoulomb positive charge. What is their common potential after they are connected by a conducting wire ????

Draw an equipotential surface in a uniform electric field...

^{2}-y^{2}+z^{2}). The electric field at the point (1,1,1) has magnitudeâ€‹Q42. A point dipole is located at the origin in some orientation. The electric field at the point (10 cm, 10 cm) on the x - y plane is measured to have a magnitude 1.0 × 10

^{–3}V/m. What will be the magnitude of the electric field at the pint (20 cm, 20 cm)(a) 5.0 × 10

^{–4}V/m(b) 2.5 × 10

^{–4}V/m(c) It will depend on the orientation of the dipole

(d) 1.25 × 10

^{–4}V/m_{0 }at the centre of the square2 identical parallel plate capacitors connected to a battery with the switch 's' closed . the switch 's' is now open and the free space between the plate of the capacitor is filled with a dielectric of k=3. Find the ratio of total energy stored in both capacitors before and after the introduction of the dielectric

$1-4\mathrm{\pi}{\in}_{0}\frac{\mathrm{ab}}{\mathrm{b}-\mathrm{a}}\phantom{\rule{0ex}{0ex}}2-4\mathrm{\pi}{\in}_{0}(\mathrm{a}+\mathrm{b})\phantom{\rule{0ex}{0ex}}3-4\mathrm{\pi}{\in}_{0}\mathrm{b}\phantom{\rule{0ex}{0ex}}4-4\mathrm{\pi}{\in}_{0}\frac{{\mathrm{b}}^{2}}{\mathrm{b}-\mathrm{a}}$

derivation of electric potential at a point on axial line of an electric dipole

i) positive ii) negative?

Four rigid rods AB, BC CD and DA each of linear mass density $\lambda $ and length a are rigidly to a square frame. This is placed in an XYZ space as shown in the figure. such that it can freely rotate about an Axis kk' (parallel to z-axis) The plane ABCD is on y-z plane. The rods AB and CD are carrying charges of linear charge density p and (- p)respectively. An electric field is existing in the space, which, is $\overline{)E}={\overline{)E}}_{0}\hat{j}$. If the wire frame is rotated by a small angle $\u25b3\mathrm{\theta}$ about the kk' axis and releaed . Find time in second required by the frame ABCD to regain its original position for the first time.

$\left(\mathrm{\lambda}=1\mathrm{kg}/\mathrm{m},\mathrm{a}=2\mathrm{m},\mathrm{p}=1/3\mathrm{C}/\mathrm{m},{\mathrm{E}}_{0}={\mathrm{\pi}}^{2}\mathrm{N}/\mathrm{C}\right)$

A 10 micro faran capacitor is charged by a 30V dc supply & then connected across an uncharged capacitor of 50 micro faran. Calculate the(1) final potential difference across the combination & the (2)initial & final energies. How will you account for the difference in energies?

Two electrons are moving towards each other,each with a velocity of 10

^{6}m/s.What will be losest distance of approach between them?consider a parallel plate capacitor of capacity 10 microfarad with air filled in the gap between the plates, now one half of the space between the plates is filled with dielectric const 4 , the capacitor of plates changes to? please answer my question as soon as possible..

draw schematically an equipotential surface of a uniform electrostatic field along x-axis.

answer soon pls

The electric potential V(x) in a region along the X-axis varies with the distance x(in m)

according to the relation V(x) = 4x

^{2}. Calculate the force experienced by a 1microC charge placed at point x = 1 m.what is a transformer? what is its principle of working? why efficiency of a transformer is less than 100%? whya transformer cannot be used to step up or step down dc voltage?

Solve this :Q. Five identical capacitor plates, each of area A are arranged such that the adjacent plates are at distance d apart. The plates are connected to a source of emf V, as shown in figure. Find the charges on the various plates.

State the laws of reflection & refraction of light. .

why is electrostatic potential constant throughout the volume of the conductor and has the same value(as inside) on its surface??

ii) Two identical capacitors of plate dimensions $l\times b$ and plate separation d have dielectric slabs filled in between the space of the plates as shown in the figure

Obtain the relation between dielectric constants K, K

_{1}and K_{2}.a 10 uF capacitor is charged to a potential difference of 50V and is connected to another uncharged capacitor in parallel. now the common potential difference becomes 20 volt. the capacitance of second capacitor is =?