Verified Solution • 2025–26 Session
moderate
QAIPMT-2007-Ph-2342: NEET 2007 Physics - Class 11 AIPMT-2007-Ph-2342 Solution: Three point charges +q -2q and +q are placed at points (x = 0 y …
Three point charges +q -2q and +q are placed at points (x = 0 y = a z = 0) (x = 0 y = 0 z = 0) and (x = a y = 0 z = 0) respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are along the line joining points (x = 0 y = 0 z = 0) and (x = a y = a z = 0) qa along the line joining points (x = 0 y = 0 z = 0) and (x = a y = a z = 0) along +x direction along +y direction.
Multiple Choice Options
- A 10.0 cm
- B any value less than 12.0 cm
- C 4.0 cm
- D 8.0 cm
Step-by-Step Verified Solution
Mass gets detached at the upper extreme position when pan returns to its mean position. At that point, R = m g _ m _ 2 a = 0 ,
i.e. g = _ 2 a
_ a = g / _ 2 = m g / k
_ a = 2 _ 10 200 [ _ A s = _ 2 = k m ]
_ a = 1/10 m = 10 cm