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Question: Answered & Verified by Expert
If the balance length corresponding to points B and C is 40 cm on the potentiometer wire, the balance length corresponding to points C and D is

PhysicsCurrent ElectricityNEET
Options:
  • A 25 cm
  • B 32 cm
  • C 50 cm
  • D 64 cm
Solution:
1935 Upvotes Verified Answer
The correct answer is: 32 cm
According to the question

VB  VC=I × 5 =ϕ × 40 ....(1)

 VC  VD=I × 4 =ϕ ×l ....(2)

from (1) and (2)

54=40ll =40×45= 32 cm

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