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1. Two point charges placed at a distances of 20 cm in air repel each other with a certain force. When a dielectric slab of thickness 8 cm and dielectric constant K is introduced between these point charges, force of interaction becomes half of it’s previous value. Then K is approximately

1.Two point charges placed at a distances of 20 cm in air repel each other with a certain force. When a dielectric slab of thickness 8 cm and dielectric constant K is introduced between these point charges, force of interaction becomes half of it’s previous value. Then K is approximately

Grade:12

3 Answers

noogler
489 Points
8 years ago
= 4
on introducing slab distance btwn charges reduces to (20-8)+8(k)1/2 =rl
 F=1/2F‘
Akshat Jain
74 Points
8 years ago
can you please tell me the whole solution
Sowmya yarnagula
15 Points
5 years ago
  • We know F=1/4​pi£0 q1q2/r^2
  • F/2=1/4pi£0 q1q2/(distance bw charges without dielectric+thickness of slab under root of dielectric constant-1)^2
  • Substituting nd solving gives the value 4

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