Cengage JEE Mains Physics by B.M Sharma
Electric dipole of moment P = pi is kept at a point (x,y) in an electric field E = 4 xy^2 i + 4 x^2 y j. Find the magnitude of force acting on the dipole.
30
Nov
Electric dipole of moment P = pi is kept at a point (x,y) in an electric field E = 4 xy^2 i + 4 x^2 y j. Find the magnitude of force acting on the dipole. Electric dipole of moment P = pi is kept at a point (x y) in an electric field E [...]
Three points charges are placed at the corners of an equilateral triangle of side L as shown in the figure: Find the dipole moment of the system.
30
Nov
Three points charges are placed at the corners of an equilateral triangle of side L as shown in the figure: Find the dipole moment of the system. Three points charges are placed at the corners of an equilateral triangle of side L as shown in the figure: Find the dipole moment of the system. November [...]
Find the dipole moment of the charged wire in the form of an arc as shown in figure. Half of the arc has linear charge density +lambda and other half -lambda. The angle subtended by the arc at the center is 2theta0 and radius of arc is R.
30
Nov
Find the dipole moment of the charged wire in the form of an arc as shown in figure. Half of the arc has linear charge density +lambda and other half -lambda. The angle subtended by the arc at the center is 2theta0 and radius of arc is R. An electron initially at rest falls a [...]
Three infinite long charged sheets of charge densities −σ,−2σandσ are placed parallel to, y-plane at z= 0, z= a, z= 3a. Electric field at point P is given as :
30
Nov
Three infinite long charged sheets of charge densities −σ,−2σandσ are placed parallel to, y-plane at z= 0, z= a, z= 3a. Electric field at point P is given as : −2σandσ are placed parallel to Three infinite long charged sheets of charge densities −σ y-plane at z= 0 z= 3a. Electric field at point P [...]
Charge is distributed non uniformly on a sphere such that volume charge density is given as p = ar where a = 8 uc/m^4 and 0 < r < R. Radius of the sphere is R = 75 cm. Find the total charge in the sphere.
30
Nov
Charge is distributed non uniformly on a sphere such that volume charge density is given as p = ar where a = 8 uc/m^4 and 0 < r < R. Radius of the sphere is R = 75 cm. Find the total charge in the sphere. An electron initially at rest falls a distance of [...]
An electron is projected as shown in fig. with kinetic energy K, at an angle θ=45^∘ between two charged plates. The magnitude of the minimum electric field so that the electron just falls to strike the upper plate is
30
Nov
An electron is projected as shown in fig. with kinetic energy K, at an angle θ=45^∘ between two charged plates. The magnitude of the minimum electric field so that the electron just falls to strike the upper plate is An electron is projected as shown in fig. with kinetic energy K at an angle θ=45^∘ [...]
An electric dipole is placed at an angle of 30∘ with an electric field of intensity 2×10^5 NC^−1. It experiences a torque equal to 9Nm. Calculate the charge on the dipole if the dipole length is 2cm is
30
Nov
An electric dipole is placed at an angle of 30∘ with an electric field of intensity 2×10^5 NC^−1. It experiences a torque equal to 9Nm. Calculate the charge on the dipole if the dipole length is 2cm is Force between two identical charges placed at a distance of r in vacuum is F. Now a [...]
A charged drop of mass 3.2×10^12 g floats between two horizontal parallel plates maintained at potential difference of 980 V and separated between the plate is 2 cm . The number of excess or direction electron on the drop is
30
Nov
A charged drop of mass 3.2×10^12 g floats between two horizontal parallel plates maintained at potential difference of 980 V and separated between the plate is 2 cm . The number of excess or direction electron on the drop is Force between two identical charges placed at a distance of r in vacuum is F. [...]
An electron initially at rest falls a distance of 1.5cm in a uniform electric field of magnitude 2×10^4N/C. The time taken by the electron to fall this distance is
30
Nov
An electron initially at rest falls a distance of 1.5cm in a uniform electric field of magnitude 2×10^4N/C. The time taken by the electron to fall this distance is An electron initially at rest falls a distance of 1.5cm in a uniform electric field of magnitude 2×10^4N/C. The time taken by the electron to fall [...]
An α-particle of mass 6.4×10^−27 kg and charge 3.2×10^−19C is situated in a uniform electric field of 1.6×10^5Vm^−1. The velocity of the particle at the end of 2×10^−2m path when it starts from rest is
30
Nov
An α-particle of mass 6.4×10^−27 kg and charge 3.2×10^−19C is situated in a uniform electric field of 1.6×10^5Vm^−1. The velocity of the particle at the end of 2×10^−2m path when it starts from rest is Force between two identical charges placed at a distance of r in vacuum is F. Now a slab of dielectric [...]