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Anurag Verma
Jul 28, 2014
A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. What is the potential at the centre of the sphere?
In the case of a hollow metal sphere, the electric field inside the shell is zero. This means that the potential inside the shell is constant. Therefore the pot...
Anurag Verma
Jul 28, 2014
Two materials Si and Cu are cooled from 300 K to 60 K. What will be the effect on their resistivity ?
Answer:
The specific resistivity of copper (metal) wil...
Letusknowwhy
May 15, 2014
What do you mean by the conservative nature of electric field?
Shivansh Rawat
May 8, 2014
Draw figures and write the properties of equipotential surfaces?
1. Equipotential surfaces never cross each other.
2. Equipotential surfaces give the direction o...
Misha Jain
Oct 13, 2014
A conducting sphere of radius 10 cm is charged with 10 μC. Another uncharged sphere of radius 20 cm is allowed to touch it for some time. After that if the spheres are separated, then surface density of charges on the spheres will be in the ratio of
Let R1 and R2 be the radii of spheres 1 and 2, respectively. Let Q1 and Q2 b...
Anurag Verma
Aug 9, 2014
A parallel plate capacitor is charged by a battery, which is then disconnected. A dielectric slab is then inserted in the space between the plates. Explain what changes, if any, occur in the values of:
(i) capacitance
(ii) potential difference between the plates
(iii) electric field between the plates
(iv) the energy stored in the capacitor .
(i) capacitance
(ii) potential difference between the plates
(iii) electric field between the plates
(iv) the energy stored in the capacitor .
(ii) Potential difference V = Q/C. As C increases and Q remains the same since the battery is disconnected, the p.d...
Letusknowwhy
May 15, 2014
How does the electric field and electric potential vary with distance from a point charge?
Variation of electric feild and potential with distance depends on which type of conductor you are using ...
Anurag Verma
Jul 28, 2014
Net capacitance of three identical capacitors in series is 1 μF . What will be their net capacitance if connected in parallel. Find the ratio of energy stored in the two configuration if they are both connected to the same source .
Altaf Hussain Shaikh Ahmed
Apr 7, 2015
In a region of constant potential
(a) the electric field is uniform
(b) the electric field is zero
(c) there can be no charge inside the region.
(d) the electric field shall necessarily change if a charge is placed
outside the region.
(a) the electric field is uniform
(b) the electric field is zero
(c) there can be no charge inside the region.
(d) the electric field shall necessarily change if a charge is placed
outside the region.
Altaf Hussain Shaikh Ahmed
Mar 20, 2015
State and prove gauss theorem in electrostatics.
https://www.learnnext.com/CBSE-Class-XII-Physics/Lesson-Gauss--Law.htm
Anurag Verma
Jul 28, 2014
A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. What is the potential at the centre of the sphere?
In the case of a hollow metal sphere, the electric field inside the shell is zero. This means that the potential inside the shell is constant. Therefore the pot...
Anurag Verma
Jul 28, 2014
Two materials Si and Cu are cooled from 300 K to 60 K. What will be the effect on their resistivity ?
Answer:
The specific resistivity of copper (metal) wil...
Letusknowwhy
May 15, 2014
What do you mean by the conservative nature of electric field?
Shivansh Rawat
May 8, 2014
Draw figures and write the properties of equipotential surfaces?
1. Equipotential surfaces never cross each other.
2. Equipotential surfaces give the direction o...
Misha Jain
Oct 13, 2014
A conducting sphere of radius 10 cm is charged with 10 μC. Another uncharged sphere of radius 20 cm is allowed to touch it for some time. After that if the spheres are separated, then surface density of charges on the spheres will be in the ratio of
Let R1 and R2 be the radii of spheres 1 and 2, respectively. Let Q1 and Q2 b...
Anurag Verma
Aug 9, 2014
A parallel plate capacitor is charged by a battery, which is then disconnected. A dielectric slab is then inserted in the space between the plates. Explain what changes, if any, occur in the values of:
(i) capacitance
(ii) potential difference between the plates
(iii) electric field between the plates
(iv) the energy stored in the capacitor .
(i) capacitance
(ii) potential difference between the plates
(iii) electric field between the plates
(iv) the energy stored in the capacitor .
(ii) Potential difference V = Q/C. As C increases and Q remains the same since the battery is disconnected, the p.d...
Letusknowwhy
May 15, 2014
How does the electric field and electric potential vary with distance from a point charge?
Variation of electric feild and potential with distance depends on which type of conductor you are using ...
Anurag Verma
Jul 28, 2014
Net capacitance of three identical capacitors in series is 1 μF . What will be their net capacitance if connected in parallel. Find the ratio of energy stored in the two configuration if they are both connected to the same source .
Altaf Hussain Shaikh Ahmed
Apr 7, 2015
In a region of constant potential
(a) the electric field is uniform
(b) the electric field is zero
(c) there can be no charge inside the region.
(d) the electric field shall necessarily change if a charge is placed
outside the region.
(a) the electric field is uniform
(b) the electric field is zero
(c) there can be no charge inside the region.
(d) the electric field shall necessarily change if a charge is placed
outside the region.
Altaf Hussain Shaikh Ahmed
Mar 20, 2015
State and prove gauss theorem in electrostatics.
https://www.learnnext.com/CBSE-Class-XII-Physics/Lesson-Gauss--Law.htm