CBSE XII Science Physics Electric Charges and Fields

ele. field

ICSE X Physics

An electron beam is moving from nortth to south and magnetic field is downwards what will be the direction of force .

Plz explain with detail

NEET1 ALL Class Magnetic Effect of Current and Magnetism Moving Charges and Magnetism and Magnetism and Matter

I need the solutions urgently. and please explain the solution thoroughly step wise

CBSE XII Science Physics Electric Charges and Fields

Is electric intensity same as electric field? When is the flux  0,dA is parallel or perpendicular to intensity?

CBSE XII Science Physics Electrostatic Potential and Capacitance

A test charge q is moved without acceleration from A(6,0) to C (2,0) along the path from A to B to C IN ELECTRIC FIELD E 

CALCULATE THE PD ACROSS A TO C

AT WHICH POINT (OF THESE TWO) THE ELECTRIC POTENTIAL IS MORE AND WHY??

NEET1 ALL Class Physics

Explain it in detail 

CBSE XII Science Physics

A charge of 17.7* 10^-4 C is distributed uniformly over a large sheet of area 200 m^2.Calculate the electric field intensity at a distance of 20 cm from it in air.

NEET1 NEET1 Physics

Effective speed of current is nearly equal to speed of light while order of drift velocity is 10^-⁴. Please explain this contrast

CBSE XII Science Physics

Please check whether my answer is correct or not.

CBSE XII Science Physics

derive an expression for the electric field at a point due to a system  of charges.

CBSE XII Science Physics

using gauss's law derive an expression for electric field intensity long, straight line of linear charge density ø per cm.

CBSE XII Science Physics

two charges q1 and q2 are placed at (2,0) and (-2,0) respectively. q1=q2=1microcoloumb. three points 1,2 and 3 are situated (3,0),(0,-2) and (-2,3) respectively. find electric force at the three points

JEE Plances JEE (Main) Physics

Calculate net electric field at the centre of a square of charges q,-Q,-q,Q.

CBSE XII Science Physics

Two point charges of minus 16 microcoulomb and + 18 microcoulomb are placed 8 cm apart find the position of the point where electric field is zero

JEE Plances JEE (Main) Physics

When a positive point charge is placed in the electric field of another point charge, how can the field decrease?  

CBSE XII Science Physics

area vector of a surface is normal outwards to it.Then how are e-field lines perpendicular to th surface of a sphere ?they make an angle of zero degree with area vector

CBSE XII Science Physics

Question:A thin fixed ring of radius 2 has a positive charge of 10^-6C and uniformly distributed over it .A particle of mass 0.9 g and having a negative charge of 10^-7C is placed on the axis at a distance of 2 cm  from the center of the ring show tha the motion of charged particle is approximately s.h.m Also calculate the time period 

CBSE XII Science Physics

how do ifind electric field due to a uniformly charged ring on a point inside it

JEE Plances JEE (Main) Physics

If point charges of equal magnitude are kept at five vertices of a pentagon, how will the resulting electric field at the centre be zero? Please explain it with a mathematical proof.

CBSE XII Science Physics

if the electric potential is same between two points,what can you tell about field strength between them?

CBSE XII Science Physics

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

NEET1 NEET1 Physics

A charge Q Is at center of a square if electric field intensity at the corners is E1 and intensity at midpoint is E2 then what is the ratio of E1 to E2  

JEE Plances JEE (Main) Physics

Give me answer

JEE Plances JEE (Main) Physics

give me solution

CBSE XII Science Physics

How  does  the  CHARGE, CAPACITY, POTENTIAL ,  ELECTRIC FIELD and  ENERGY  associated wih a  capacitor   changes  when  the  SEPERATION between  the PLATES  INCREASES [A] when BATTERY  IS  DISCONNECTED  [B] when  BATTERY  IS  CONNECTED

NEET1 NEET1 Physics

Assertion :- Electric field inside a current carrying wire is zero. Reason :- Net charge in a current carrying wire is non zero.

NEET1 NEET1 Physics

2 small spheres AandB Are charged with +10 and+20 coulomb separated by a distance of 80cm .electc field at a point   on the centres of the sphere where will it be 0  

CBSE X Physics

sir can you tell me that when thunder strikes then the absorbers absorbes it and then send it to the ground but why thunder strikes doesn't affects aeroplane even though it is not connected with ground level and its contact with ground is so near ???????????????

CBSE XII Science Physics

why we introduce the concept electric field in electrostatics ? give one benefit of it

CBSE XII Science Physics

The electric field E due to any point charge near it is defind E=lim f/q where q is the test charge. what is the physical significance of taking limit tends to zero in this expression ? Draw the electric field lines of point charge when Q>0 and Q<0.  

CBSE XII Science Physics

Please explain in simple language.. A long charged cylinder of linear charge density +lambda 1 is surrounded by a hollow coaxial conducting cylinder of linear charge density -lambda 2. Use Gauss's law to obtain expression for the electric field at (1)a point in the space between the cylinders, (2)outside the larger cylinder.   

NEET1 NEET1 Physics

Please answer the following question with explanation

CBSE XII Science Chemistry

if x y plane is an equipotential surface what is the direction of electric field in the cartesian coordinate system?  

JEE Plances JEE (Main) Physics

Sir solve it

JEE Plances JEE (Main) Physics

Solve it

CBSE XII Science Physics Electric Charges and Fields

obtain an expression showing the relation between the current density in a current carrying conductor the is drift velocity the number of free electrons per unit volume and the electronic charge  derive an expression for drift velocity of free electrons

CBSE XI Science Physics Work, Energy and Power

An electron of energy10^3 eV is fired normally to the infinite.Conducting plate from 5mm.Calculate the minimum surface charge density on the conducting plate so that electron does not strike the plate .

CBSE XII Science Physics Electric Charges and Fields

The area of metallic plate is 10^-2m^2.A charge of 10 micro C is given to the plate . Determine the electric field at a point near the plate 

CBSE XII Science Physics Electric Charges and Fields

please solve the question in the picture.

NEET NEET Physics Electrostatics

Please answer  the following question with explanation

CBSE XII Science Physics Electric Charges and Fields

A) Two charges +4esu and +9 esu are situated at a distance of 10 cm . A unit charge is situated at a point on the line joining the charges.  At what point the unit charge experiences a force which is  (a) equal and opposite,(b)equal and in the same direction? B) Two conductors have resistance R1 and R2 at 0°C. Their temperature coefficients of resistances are a1 and a2 respectively.  Show that the temperature coefficients of their equivalent resistances when joined in series and in parallel are respectively   (R1a1+R2a2)/(R1+R2) and (R1a2+R2a1)/(R1+R2)

CBSE XII Science Physics Electric Charges and Fields

prove electric field is conservative in nature.

CBSE XII Science Physics Electric Charges and Fields

A point charge +Q

CBSE XII Science Physics Electric Charges and Fields

Two infinity large plane

CBSE XII Science Physics Electric Charges and Fields

a proton(q,m),a deutron(q,2m) and an alpha particle(q,4m) moves perpendicular to the electric field with same -1)velocity 2)momentum 3)kinetic energy.Find ratio of deflection in each case?

CBSE XII Science Physics Electric Charges and Fields

two charges q,-q are placed at (0,0,a) and (0,0,-a).Find out the electric field at (0,0,z) and (k,0,0)?  

CBSE XII Science Physics Electric Charges and Fields

DO A CHARGED BODY EXERT FORCE ON UNCHARGED BODY ? IF YES WHY ?  

NEET NEET Physics

Q no 2

CBSE XII Science Physics Electric Charges and Fields

Plzz explain

JEE Main Physics Electrostatics

Q.If an electron has an initial velocity in a direction different from that of an electric field,then the path of the electron is.....

CBSE XII Science Physics Electric Charges and Fields

Plzz explain

CBSE XII Science Physics Electric Charges and Fields

Why do the electric field lines never cross each other 

NEET NEET Physics Electrostatics

Cud u please answer this

CBSE XII Science Physics Electric Charges and Fields

calculate the electric field strength required to just support a water drop of mass 10  and having a change og 1.6?

CBSE XII Science Physics

Hi

JEE Main Physics

An electron is projected with velocity 10^7m/s at an angle  A=30 degrees with horizontal in a region of uniform electric field  of 500N/C vertically upwards.Find the maximum distance covered by an electron in vertical direction above its initial  level.

JEE Main Physics

A point charge is projected along the axis of circular ring of  charge Q and radius10(2)^1/2 cm.the distance of the point charge from the centre of the ring,where the acceleration of the charged particle is maximum,will be

CBSE XII Science Physics Electric Charges and Fields

Please answer this question.

JEE Main Physics

Please give solution of the given figure.  

CBSE XII Science Physics Electric Charges and Fields

A charge of 17.7 ×10^-4 c is distributed uniformly over a large sheet of area 200 m^2 .calculate the electric field intensity at a distance 20 cm from it in air

CBSE XII Science Physics Electric Charges and Fields

Hello

NEET NEET Physics

Question:A particle having a mass of 10–2 kg carries a charge of 5 × 10–6 C. The particle is given an initial horizontal velocity of 105 ms–1 in the presence of electric field  and magnetic field . To keep the particle moving in a horizontal direction, it is necessary that     (1)  should be perpendicular to the direction of velocity and  should be along the direction of velocity.     (2) Both  and  should be along the direction of velocity.     (3) Both  and  are mutually perpendicular and perpendicular to the direction of velocity.     (4)  should be along the direction of velocity and  should be perpendicular to the direction of velocity.     Which one of the following pairs of statements is possible?   1.   (1) and (3)  2. (3) and (4) 3.  (2) and (3)  4.  (2) and (4)

CBSE XII Science Physics Electric Charges and Fields

Hello

NEET NEET Physics

The magnitude of electric field E in the annular region of a charged cylindrical capacitor is .Please explain. Ans is varies as 1/r, where r is the distance from the axis

CBSE XII Science Physics

a copper wire ring of radius 15cm is given a charge 100uc.find the electric potential and the intensities at the center of the ring and the point on the axis at a distance 10cm from its center  

CBSE XII Science Physics Electric Charges and Fields

Why is the electric field in a capacitor after introduction of dielectric= (sigma -sigma p)/ epsilon . Where sigma is surface charge density and sigma p is surface charge density of the polarised dielectric.  

NEET NEET Physics

HELP NEEDED WITH THIS PHYSICS PROBLEM

NEET NEET Physics

HELP

JEE Main Physics

How  time varying magnetic field produces time varyimg magnetic field?pls try to  explain in theory not mathematical concept

CBSE XII Science Physics Electric Charges and Fields

sir infinite rod se toh uniform electirc field hogi toh dE toh zero ho jayega na ? 

NEET NEET Physics Electrostatics

4 charges are placed on corners of a square having side of 5cm. If Q is one microcoulomb, then electric field intensity at center will be?

JEE Main Physics

Please Sir solve the problem of electromagnetic radiation... 

CBSE XII Science Physics

If any electric field exists in the conductor ,it would produce ordered motion of electrons without expense of external energy.This violates law of conservation of energy.PLEASE EXPLAIN THESE LINES

CBSE XII Science Physics

Semi infinite rod having linear charge density  lemda . Find the electric field at a distance  r from the one end of rod & normal  to the rod .

NEET NEET Physics

ELECTRIC FIELD ⭕ Help me in this question.... Thanks ☺️ ✓↪️ plz, refer to attachment ↩️

CBSE XII Science Physics

Pl ans

NEET NEET Physics

please answer this

CBSE XI Science Physics

When plug is pulled ,then a spark is shown why

CBSE XII Science Physics

Please solve this question 

NEET NEET Physics

please answer this

CBSE XII Science Physics

why is the electrostatic field always normal to surface of any charged conductor?  

CBSE XII Science Physics Electric Charges and Fields

energy associated with a moving charges with due to

CBSE XII Science Physics Electric Charges and Fields

a charge + q is placed at each of the four corners of a square of side a. what charge should be placed at the centre of the square so that entire system remain in equilibrium ?

CBSE XII Science Physics Electric Charges and Fields

this one

CBSE XI Science Physics

Two charged particles lie along x axis. A particle q1= 8 C is at 6m and q2= 2 C is at origin. Find the point where field is zero

CBSE XI Science Physics

Four identical charges are fixed at corners of a square of side a. Find field at point p which is at a distance z lying on the line perpendicular to the plane of square passing through centre of square

JEE Main Physics

what is electric field intensity at the centre of the ring  

NEET NEET Physics Electrostatics

for what value of x the electric field intensity is maximum on the axial line of the circular ring

CBSE XII Science Physics Electric Charges and Fields

please solve  

CBSE XII Science Physics Electric Charges and Fields

Fig shows a plastic ball of mass m suspended by a light string in a uniform field of intensity e.the ball comes in equilibrium at an angle thita .if ex and ey are the x component and y component of the electric field, find the charge on the ball and the tension in the string  

CBSE XII Science Physics Electric Charges and Fields

In fig three point charges q,-2q are q are placed along the x axis. Show that the electric field at p along the y axis is E =(1/4×3.14×e knot)×(3qa^2/y^4),when y>>a.

CBSE XII Science Physics Electric Charges and Fields

what is electric field

CBSE XII Science Physics Electric Charges and Fields

An electric dipole moment 4x10^-9 cm is aligned at 30°with the direction of a uniform electric field of magnitude 5x10^4 NC^-1.calculate the magnitude of the torque acting on the dipole? 

NEET NEET Physics

hello, can we find the electric potential if the electric field is given? As the potential is scalar and field is a vector how can we related them ?

CBSE XII Science Physics Electrostatic Potential and Capacitance

why are electric field is zero in a cavity in a conductor

JEE Main Physics Electrostatics

CBSE XII Science Physics Electric Charges and Fields

State Gauss's theorem ? Derive the expression for electric field due Spherical hollow conductor and infinitely charged sheet and linearly charged conductors.

CBSE XII Science Physics Electric Charges and Fields

hello mam When a potential difference of 1.5 V is applied across a wire of length 0.2 m and area of  cross-section 0.30 mm^2 , a current of 2.4 A flows through the wire. If the number density of  free electrons in the wire is 8.4 X 10^28 m^-3 , calculate the average relaxation time.

CBSE XII Science Physics Electrostatic Potential and Capacitance

What is the relation between electric field and potential difference?

CBSE XII Science Physics Electric Charges and Fields

There is one charged tiny spherical oil drop and the magnitude of electric field intensity at a point on its surface is E. If n such drops are combined to make a single drop then what will be the net electric field intensity at a point on the surface of the bigger spherical drop. Assume that charge is uniformly distributed over the volume of oil drop.

CBSE XII Science Physics Electrostatic Potential and Capacitance

how the electric field b/w parallel plate capacitor comes out to be sigma/ۥ

NEET NEET Physics Electrostatics

answer

NEET NEET Physics Electrostatics

electric charges and field and flux

CBSE XII Science Physics Electric Charges and Fields

Two point charges 2 C and 3 uC are placed at two comers of an equilateral triangle of side 20 cm in free space. Calculate the magnitude of resultant electric field at the third corner of the triangle. If an & - particle is placed at the third corner, what is the force acting on it? (Charge on & – particle is 3.2 x 10-19 €).

NEET NEET Physics Electrostatics

the electric field due to a positive charge at a distance 2m is 4N\c it's magnitude at distance of 4m will be