Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A wire of resistance 8R is bent in the form of a circle. What is the effective resistance between the ends of a diameter AB?




When it is bent to form circle.......the ends of diameter seperates the circle into semicircles in such a way that the two semicircles make a parallel connection in the circuit.Also both the semicircles have equal circumference therefore they have equal resistance.We get 4R as the resistances of the semi circles {8R=4R+4R}.

Therefore 1/effective resistence =1/4 + 1/4 =1/2 ===Effective resistance=2R

0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts