1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Problem on Ohm's Law

  1. May 27, 2015 #1
    1. The problem statement, all variables and given/known data
    In the circuit shown the value of I in ampere is

    2. Relevant equations
    ## V = I R ##

    3. The attempt at a solution
    Leaving 4 ohm above resistor Equivalent R will be
    ##R_{eq} = \frac{4*4}{4+4} + 4 + 1.6 = 7.6##
    ##I = \frac{V}{R}##
    ## I = \frac{4}{7.6} = 0.526 ##
    Ans is not given in the option please tell what I'm doing wrong
  2. jcsd
  3. May 27, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member
    2017 Award

    Why do you think you can ignore the top resistor?

    Also, note that the middle contraption is two 4 ohm resistors in parallel with a wire of resistance zero ...
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted