Verified Solution • 2025–26 Session moderate

QNEET-2019-Ph-800: NEET 2019 Physics - Class 12 NEET-2019-Ph-800 Solution: Two point charges A and B having charges +Q and -Q respectively …

Two point charges A and B having charges +Q and -Q respectively are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B then force between the charges becomes: F 16F/9 9F/16 4F/3

Multiple Choice Options

  • A F
  • B 16F9{{16F} \over 9} 9 16 F _
  • C 9F16{{9F} \over {16}} 16 9 F _
  • D 4F3{{4F} \over 3} 3 4 F _

Step-by-Step Verified Solution

Initially F = _ K Q 2 r 2 If 25% of charge of A transferred to B then after the transformation of charge. q A = Q _ Q 4 = 3 Q 4 and q b = -Q + Q 4 = _ 3 Q 4 New force, F 1 = K ( 3 Q 4 ) ( _ 3 Q 4 ) r 2 = _ 9 16 K Q 2 r 2 = 9 F 16

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