Chapter 17 – Electric Charge and Field
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 17 - Electric Charge and Field
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 [...]
A rod lies along the X-axis with one end at the origin and the other at x→∞. It carries a uniform charge λCm^−1. The electric field at the point x=−a on the axis will be
30
Nov
A rod lies along the X-axis with one end at the origin and the other at x→∞. It carries a uniform charge λCm^−1. The electric field at the point x=−a on the axis will be A rod lies along the X-axis with one end at the origin and the other at x→∞. It carries a [...]
In the uniform electric field of E=1×10^4 NC^−1 , an electron is accelerated from rest. The velocity of the electron when it has travelled a distance of 2×10^−2 m is nearly ( m/e of electron =1.8×10^11 C kg^−1 )
30
Nov
In the uniform electric field of E=1×10^4 NC^−1 , an electron is accelerated from rest. The velocity of the electron when it has travelled a distance of 2×10^−2 m is nearly ( m/e of electron =1.8×10^11 C kg^−1 ) an electron is accelerated from rest. The velocity of the electron when it has travelled a [...]
There is a uniform electric field of strength 10^3V/m along y-axis; A body of mass 1 g and change 10^6 C is projected into the field from origin along the positive x-axis with a velocity 10 m/s. Its speed in m/s after 10s will be .(neglect gravitation)
30
Nov
There is a uniform electric field of strength 10^3V/m along y-axis; A body of mass 1 g and change 10^6 C is projected into the field from origin along the positive x-axis with a velocity 10 m/s. Its speed in m/s after 10s will be .(neglect gravitation) Force between two identical charges placed at a [...]
A semi-circular arc of radius ‘a’ is charged uniformly and the charge per unit length is λ. The electric field at its centre is
30
Nov
A semi-circular arc of radius ‘a’ is charged uniformly and the charge per unit length is λ. The electric field at its centre is A semi-circular arc of radius 'a' is charged uniformly and the charge per unit length is λ. The electric field at its centre is November 30, 2020 Category: Cengage JEE Mains [...]