JEE Main · PhysicsHard
A dipole with dipole moment $p$ is placed at a distance $r$ from along charged wire with linear charge density $\lambda$. The force on the dipole is proportional to:
- A.$\frac{p \lambda}{r}$
- B.$\frac{p \lambda}{r^2}$
- C.$\frac{p \lambda}{r^3}$
- D.$\frac{p \lambda}{r^4}$
Show correct answer & step-by-step solution
Correct answer: B — $\frac{p \lambda}{r^2}$
Solution
The electric field of along wire is . The force on a dipole is . Since , the force is .
Attempt this question & track your score
Sign up free to answer, get instant scoring, and let SolveGini track which Physics topics you need to revise.
Attempt & Track Free →More Electrostatics practice questions
- Two point charges of 2 microcoulombs and 8 microcoulombs are placed 12 cm apart. The location of the neutral point where
- An electric dipole is placed in a uniform electric field. The net force on the dipole is:
- The electric potential at a distance r from a point charge q is given by:
- If the distance between two point charges is doubled, the electrostatic force between them becomes:
- The SI unit of electric flux is:
- Two point charges of 4 microcoulombs and -2 microcoulombs are separated by a distance of 1 meter in air. At what distanc
- A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 80 volts. What is the potenti
- An electric dipole is placed in a uniform electric field of magnitude 200 newtons per coulomb at an angle of 30 degrees
- Three charges each equal to q are placed at the corners of an equilateral triangle of side a. What is the electric field
- A parallel plate capacitor has plates of area 0.01 square meters separated by a distance of 0.001 meters. If the space b
- A solid non-conducting sphere of radius R has a volume charge density rho that varies with distance r from the center as