A positive point charge `+Q` is fixed in space .A negative point charge `-q` of mass `m` revolves around a fixed charge in elliptical orbits .The fixed charge `+Q `is at one focus of the ellipse.The only force acting on negative charge is the electrostatic force due to positive charge is the electrostatic force due ot positive charge.Then which of the following statement is true A. Linear momentum of negative point charge is conservedB. Angular momentum of negative point charge about fixed positve charge is conservedC. Total Kinetic energy of negative point charge is conserved.D. Electrostatic potential energy of system of both point charge is conserved.

A positive point charge `+Q` is fixed in space .A negative point charg

1.	A positive point charge `+Q` is fixed in space .A negative point charge `-q` of mass `m` revolves around a fixed charge in elliptical orbits .The fixed charge `+Q `is at one focus of the ellipse.The only force acting on negative charge is the electrostatic force due to positive charge is the electrostatic force due ot positive charge.Then which of the following statement is true A. Linear momentum of negative point charge is conservedB. Angular momentum of negative point charge about fixed positve charge is conservedC. Total Kinetic energy of negative point charge is conserved.D. Electrostatic potential energy of system of both point charge is conserved.
Answer» Correct Answer - B Only angular momentum `x` & total energy are conserved but not kinetic energy.

Discussion

No Comment Found

Related InterviewSolutions

One-fourth of a sphere of radius R is removed as shown in figure. An electric field E exists parallel to the xy plane . Find the flux through the remaining curved part. A. `piR^(2)E`B. `sqrt(2)piR^(2)E`C. `pir^(2)E//sqrt(2)`D. `2piR^(2)E`
A cylinder of radius `R` and length `L` is placed in the uniform electric field `E` parallel to the cylinder axis.The total flux from the two flat surface of the cylinder is given byA. `2piR^(2)E`B. `(piR^(2))/(E)`C. `(piR^(2)-piR)/(E)`D. zero
A bob of a simple pendulum of mass `40gm` with a positive charge `4xx10^(-6)C` is oscillating with a time period `T_(1)`.An electric field of intensity `3.6xx10^(4)N//C` is applied vertically upwards.Now the time period is `T_(2)` the value of `(T_(2))/(T_(1))` is `(g=10//s^(2))`A. `0.16`B. `0.64`C. `1.25`D. `0.8`
The inward and outward electric flux for a closed surface unit of `N-m^(2)//C` are respectively `8xx10^(3)` and `4xx10^(3)`. Then the total charge inside the surface is [where `epsilon_(0)=` permittivity constant]A. `4xx10^(3)`B. `-4xx10^(3)`C. `-(piR^(2)-piR)/(E)`D. `-4xx10^(3)epsilon_(0)`
A hemispherical body of radius R is placed in a uniform electric field E. What is the flux linked with the curved surface if, the field is (a) parallel to the base, (b) perpendicular to the base.A. `2piR^(2)E`B. `piR^(2)E`C. `4piR^(2)E`D. `6piR^(2)E`
A uniform electric field pointing in positive x-direction exists in a region. Let A be the origin, B be the point on the x-axis at `x=+1cm ` and C be the point on the y-axis at `y=+1`cm. then the potetial at the points A,B and C satisfya. `V_AltV_B`, b. `V_AgtV_B` c. `V_AltV_C` d. `V_AgtV_C`A. `V_(A)lt V_(B)`B. `V_(A)gt V_(B)`C. `V_(A)lt V_(C)`D. `V_(A)gt V_(C)`
A cube of arranged such that its length ,breadth ,height are along`X,Y,Z` directions one of its corners is situated at the origin Length of each side of the cube is `25cm` .The components of electric field are `E_(x)=400sqrt(2)N//C` E_(y)=0` and `E_(z)=0` respectively.Flux coming out of the cube at one end will beA. `25sqrt(2)Nm^(2)//C`B. `5sqrt(2)Nm^(2)//C`C. `250sqrt(2)Nm^(2)//c`D. `25Nm^(2)//C`
`A,B,C` are three points as a circle of radius `1cm`.These points form the corners an equilateral triangle .A charge `2C` is placed at the centre of circle .The work done in carrying a charge of `0.1muc` form `A` to `B` isA. zeroB. `18xx10^(11)J`C. `1.8xx10^(11)J`D. `54xx10^(11)J`
Point charge of `3xx10^(-9)C` are situated at each of three corners of a square whose side is `15cm`. The magnitude and direction of electric field at the vacant corner of the square isA. `2296V//m` along the diagonalB. `9622V//m` along the diagonalC. `22.0V//m` along the diagonalD. Zero
Three charges each`20muC` are placed at the corners of an equilateral triangle of side `0.4m` The potential energy of the system isA. `18xx10^(-6)J`B. `9J`C. `9xx10^(-6)J`D. `27J`

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment