✕
  1. Tardigrade
  2. Question
  3. Physics
  4. Two concentric conducting spheres of radii r1 and ( textr) text2(( textr) text1 ( text < r) text2) carry electric charges of + Q and -Q respectively. The region between the sphere is filled with two insulating layers of dielectric constant textε1 and textε2 and width d1 and d2 respectively. Variation of the potential and electric field with radial distance from O is given. Select the correct one. (assume V at r2=0 ) <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-k42q7b4cacgo.png />

Q. Two concentric conducting spheres of radii and carry electric charges of and respectively. The region between the sphere is filled with two insulating layers of dielectric constant and and width and respectively. Variation of the potential and electric field with radial distance from is given. Select the correct one. (assume at )

NTA AbhyasNTA Abhyas 2020Electrostatic Potential and Capacitance Report Error

Solution:



Electric field




Potential can be find out by integrating
i.e.

Questions from NTA Abhyas 2020

1. A bob of mass is suspended by a massless string of length . The horizontal velocity at position is just sufficient to make it reach point . The angle at which the speed of the bob is half of that at satisfies

Work, Energy and Power

2. The velocity displacement graph of a particle moving along a straight line is -



The most suitable acceleration-displacement graph will be

Motion in a Straight Line

3. A drum of radius and mass rolls down without slipping along an inclined plane of angle . The frictional force

System of Particles and Rotational Motion

4. A sample of is used internally as a medical diagnostic tool to look for the effects of the positron decay . How long does it take for of the to decay?

Nuclei

5. If the mass of neutron , then the de-Broglie wavelength of neutron of energy is

Questions from Electrostatic Potential and Capacitance

1. In the adjoining figure, the electric field lines for charges and are shown. Identify the sign of the charges.

NTA Abhyas 2020

2. A charge is distributed over two concentric conducting thin spherical shells radii and . If the surface charge densities on the two shells are equal, the electric potential at the common centre is :

JEE Main 2020

3. A little charged bead is inside the hollow frictionless sphere manufactured from the insulating material. Sphere has a diameter of . The mass of the bead is , its charge is . What minimum charge must carry an object at the bottom of the sphere to keep hold the charged bead at the vertex of the sphere in stable equilibrium?

NTA Abhyas 2020

4. The capacitance of an air capacitor is the separation between the parallel plates is . A copper plate of thickness is introduced symmetrically between the plates. The capacitance now becomes

5. Three capacitors of and are connected in series to a source. The charge on the capacitor is

Physics Most Viewed Questions

1. If and respectively denote energy and gravitational constant, then has the dimensions of:

NEET 2021 Physical World, Units and Measurements

2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

NEET 2020 Dual Nature of Radiation and Matter

3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

NEET 2021 Motion in a Straight Line

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

NEET 2020 Electromagnetic Induction

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

NEET 2020 Mechanical Properties of Fluids

Latest Updates