Chapter 2 – Electrostatic Potential and Capacitance
Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 2 > Chapter 2 - Electrostatic Potential and Capacitance
A parallel plate capacitor is made of two circular plates separated by a distance 5mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 3×10^4V/m the charge density of the positive plate will be close to:
05
Dec
A parallel plate capacitor is made of two circular plates separated by a distance 5mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 3×10^4V/m the charge density of the positive plate will be close to: The given graph shows variation (with distance r from center) [...]
Assume that an electric field E→=30x^2jˆ exists in space. Then the potential difference VA−VO, where VO is the potential at the origin and VA the potential at x=2m is:
05
Dec
Assume that an electric field E→=30x^2jˆ exists in space. Then the potential difference VA−VO, where VO is the potential at the origin and VA the potential at x=2m is: Assume that an electric field E→=30x^2jˆ exists in space. Then the potential difference VA−VO where VO is the potential at the origin and VA the potential [...]
A long cylindrical shell carries positive surface charge σ in the upper half and negative surface charge −σ in the lower half. The electric field lines around the cylinder will look like figure given in:(figures are schematic and not drawn to scale)
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Dec
A long cylindrical shell carries positive surface charge σ in the upper half and negative surface charge −σ in the lower half. The electric field lines around the cylinder will look like figure given in:(figures are schematic and not drawn to scale) The given graph shows variation (with distance r from center) of : December [...]
A combination of capacitors is set up as shown in the figure. The magnitude of the electric field, due to a point charge Q (having a charge equal to the sum of the charges on the 4μF and 9μF capacitors), at a point distance 30 m from it, would equal to
05
Dec
A combination of capacitors is set up as shown in the figure. The magnitude of the electric field, due to a point charge Q (having a charge equal to the sum of the charges on the 4μF and 9μF capacitors), at a point distance 30 m from it, would equal to A combination of capacitors [...]
The region between two concentric spheres of radii ‘a’ and ‘b’, respectively (see figure), have volume charge density ρ=A/r, where A is a constant and r is the distance from the centre. At the centre of the spheres is a point charge Q. The value of A such that the electric field in the region between the spheres will be constant, is:
05
Dec
The region between two concentric spheres of radii ‘a’ and ‘b’, respectively (see figure), have volume charge density ρ=A/r, where A is a constant and r is the distance from the centre. At the centre of the spheres is a point charge Q. The value of A such that the electric field in the region [...]
An electric dipole has a fixed dipole moment p , which makes angles θ with respect to x-axis. When subjected to an electric field E 1=Ei^, it experiences a torque T1=τk^. When subjected to another electric field E2=3–√E1j^ it experiences a torque T 2=−T1. The angle θ is
05
Dec
An electric dipole has a fixed dipole moment p , which makes angles θ with respect to x-axis. When subjected to an electric field E 1=Ei^, it experiences a torque T1=τk^. When subjected to another electric field E2=3–√E1j^ it experiences a torque T 2=−T1. The angle θ is An electric dipole has a fixed dipole [...]
A capacitance of 2μF is required in an electrical circuit across a potential difference of 1kV. A large number of 1μF capacitors are available which can withstand a potential difference of not more than 300v. The minimum number of capacitors required to achieve this is
05
Dec
A capacitance of 2μF is required in an electrical circuit across a potential difference of 1kV. A large number of 1μF capacitors are available which can withstand a potential difference of not more than 300v. The minimum number of capacitors required to achieve this is The given graph shows variation (with distance r from center) [...]
A parallel plate capacitor of capacitance 90 pF is connected to a battery of emf 20 V. If a dielectric material of dielectric constant K= 5/3 is inserted between the plates, the magnitude of the induced charge will be :
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Dec
A parallel plate capacitor of capacitance 90 pF is connected to a battery of emf 20 V. If a dielectric material of dielectric constant K= 5/3 is inserted between the plates, the magnitude of the induced charge will be : A parallel plate capacitor of capacitance 90 pF is connected to a battery of emf [...]
Three concentric metal shells A, B and C of respective radii a, b and c (a < b < c) have surface charge densities +σ,−σ and +σ respectively. The potential of shell B is :
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Dec
Three concentric metal shells A, B and C of respective radii a, b and c (a < b < c) have surface charge densities +σ,−σ and +σ respectively. The potential of shell B is : −σ and +σ respectively. The potential of shell B is? b and c (a < b < c) have surface [...]
In the circuit shown, find C if the effective capacitance of the whole, circuit is to be 0.5μF. All values in the circuit are in μF.
05
Dec
In the circuit shown, find C if the effective capacitance of the whole, circuit is to be 0.5μF. All values in the circuit are in μF. circuit is to be 0.5μF. All values in the circuit are in μF. find C if the effective capacitance of the whole In the circuit shown December 5, 2020 [...]