Please wait...
Contact Us
Contact
Need assistance? Contact us on below numbers

For Study plan details

10:00 AM to 7:00 PM IST all days.

For Franchisee Enquiry

OR

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this number

93219 24448 / 99871 78554

Mon to Sat - 10 AM to 7 PM

Q2

qsnImg
Asked by Tanishq 7th May 2018, 7:24 AM
Answered by Expert
Answer:
(1) Equivalent resistance across AD
As shown in fig.(A), let us assume a current of i at A is entering the given network and leaving at D. By symmetry the current i is divided into three equal parts i/3 and equal currents are flowing through AB, AD and AF. Let V volts be the potential at point A and at points B,d and F let the potential be (V-x) volts.
 
Hence across AD we have potential drop x volts which is given by x = (i/3)×R, then equivalent resistace is (R/3) ohms
 
(2) Equivalent resistance across AB
As shown in fig.(B), let us assum a current of i at A is enetering the given network and leaving at B. By symmetry equal currents flow through AF and AD. Hence D and F are equi-potential points. There will not be any flow through DF (shown in figure as green). Similarly by symmetry, equal current flows from C to B and also from E to B. Hence C and E are equi-potential points. There will not be any current flow along CE(shown in figure as green). Using these conditions, the given network is unfolded as shown in fig.(B). Now AC,CD anf DB are in series and resistance of path AC+CD+DB is 3R Ω. Similarly the path AE+EF+FB has resistance 3R Ω. The equivalent  resistance is parallel combination of 3R Ω, R Ω and 3R Ω, which is (3/5)R Ω

Answered by Expert 8th May 2018, 1:51 PM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer 10/10

Your answer has been posted successfully!

Free related questions

18th May 2022, 11:58 PM

Chat with us on WhatsApp