Arihant Physics by D.C Pandey
A charge Q is uniformly distributed over a long rod AB of length L as shown in the figure. The electric potential at the point O lying at distance L from the end A is
05
Dec
A charge Q is uniformly distributed over a long rod AB of length L as shown in the figure. The electric potential at the point O lying at distance L from the end A is A charge Q is uniformly distributed over a long rod AB of length L as shown in the figure. The [...]
Two capacitors C1 and C2 are charged to 120 V and 200 V respectively. It is found that by connecting them together the potential on each one can be made zero. Then,
05
Dec
Two capacitors C1 and C2 are charged to 120 V and 200 V respectively. It is found that by connecting them together the potential on each one can be made zero. Then, Two capacitors C1 and C2 are charged to 120 V and 200 V respectively. It is found that by connecting them together the [...]
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)
05
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 :
05
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 [...]