Chapter 18 – Electric Potential and Capacitance
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 18 - Electric Potential and Capacitance
A particle of mass 40 mg and carrying a charge 5×10^−9C is moving directly towards a fixed positive point charge on magnitude 10^−8C. When it is at a distance of 10 cm from the fixed positive point charge it has a velocity of 50cms^−1 at what distance from the fixed point charge will the particle come momentarily to rest ?
30
Nov
A particle of mass 40 mg and carrying a charge 5×10^−9C is moving directly towards a fixed positive point charge on magnitude 10^−8C. When it is at a distance of 10 cm from the fixed positive point charge it has a velocity of 50cms^−1 at what distance from the fixed point charge will the particle [...]
In a field free region, two electrons are released to move on a line towards each other with velocities 10^6 ms^−1 . The distance of their closest approach will be nearer to
30
Nov
In a field free region, two electrons are released to move on a line towards each other with velocities 10^6 ms^−1 . The distance of their closest approach will be nearer to In a field free region two electrons are released to move on a line towards each other with velocities 10^6 ms^−1 . The [...]
Three identical charges each of 2 uC are placed at the vertices of a triangle ABC as shown in the figure. If AB + AC = 12 cm and AB. AC = 32 cm, the potential energy of the charge at A is
30
Nov
Three identical charges each of 2 uC are placed at the vertices of a triangle ABC as shown in the figure. If AB + AC = 12 cm and AB. AC = 32 cm, the potential energy of the charge at A is the potential energy of the charge at A is Three identical charges [...]
A body of mass M and charge q is connected to a spring of spring constant k. It is oscillating along x-direction about its equilibrium position, taken to be at x=0, with an amplitude A. An electric field E is applied along the x-direction. Which of the following statements is correct ?
30
Nov
A body of mass M and charge q is connected to a spring of spring constant k. It is oscillating along x-direction about its equilibrium position, taken to be at x=0, with an amplitude A. An electric field E is applied along the x-direction. Which of the following statements is correct ? A body of [...]
Two point charges A=+3nC and B=+1nC are placed 5 cm apart in air. The work done to move charge B towards A by 1cm is
30
Nov
Two point charges A=+3nC and B=+1nC are placed 5 cm apart in air. The work done to move charge B towards A by 1cm is Two point charges A=+3nC and B=+1nC are placed 5 cm apart in air. The work done to move charge B towards A by 1cm is November 30, 2020 Category: Cengage [...]
The energy density per unit volume of medium in an electric field of intensity 400 V/m is (dielectric constant of material is 2 and e0 = 8.85 x 10^-12 units)
30
Nov
The energy density per unit volume of medium in an electric field of intensity 400 V/m is (dielectric constant of material is 2 and e0 = 8.85 x 10^-12 units) The energy density per unit volume of medium in an electric field of intensity 400 V/m is (dielectric constant of material is 2 and e0 [...]
Calculate the energy per unit volume of a medium of dielectric constant 3,if the intensity of the electric field is 100v/m
30
Nov
Calculate the energy per unit volume of a medium of dielectric constant 3,if the intensity of the electric field is 100v/m Calculate the energy per unit volume of a medium of dielectric constant 3 if the intensity of the electric field is 100v/m November 30, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , [...]
Two positive point charges of 12 and 5 microcoulombs, are placed 10 cm apart in air. The work needed to bring them 4 cm closer is
30
Nov
Two positive point charges of 12 and 5 microcoulombs, are placed 10 cm apart in air. The work needed to bring them 4 cm closer is are placed 10 cm apart in air. The work needed to bring them 4 cm closer is Two positive point charges of 12 and 5 microcoulombs November 30, 2020 [...]
Three point charges 3nC,6nC and 9nC are placed at the corners of an equilateral triangle of side 0.1m. The potential energy of the system is
30
Nov
Three point charges 3nC,6nC and 9nC are placed at the corners of an equilateral triangle of side 0.1m. The potential energy of the system is 6nC and 9nC are placed at the corners of an equilateral triangle of side 0.1m. The potential energy of the system is Three point charges 3nC November 30, 2020 Category: [...]
Two identical thin rings, each of radius 10cm carrying charges 10C and 5C are coaxially placed at a distance 10cm apart. The work done in moving a charge q from the centre of the first ring to that of the second is
30
Nov
Two identical thin rings, each of radius 10cm carrying charges 10C and 5C are coaxially placed at a distance 10cm apart. The work done in moving a charge q from the centre of the first ring to that of the second is each of radius 10cm carrying charges 10C and 5C are coaxially placed at [...]