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!

Factors determining the sensitivity of a galvanometer

Tags:
  1. Jun 10, 2017 #1
    1. The problem statement, all variables and given/known data
    A galvanometer is connected to a solenoid, and there is a magnet bar entering the solenoid to induce an emf. What factors determine the displacement of the pointer of the galvanometer?

    2. Relevant equations
    emf (induced) = -N ΔΦ/ Δt
    sensitivity of the galvanometer = θ/i
    3. The attempt at a solution

    That might be an easy question, but my text book doesn't give me the answer and I would like to make sure of my solution.
    When I read the question I though in various factor:
    1. The rate of change of magnetic flux.
    2. The number of turns of the solenoid.
    3. The resistance of the solenoid.
    4. The sensitivity of the galvanometer.
    I just don't know how to pick the suitable factors to put in my exam, and the most convenient ones for the case mentioned above, i.e. a magnetic bar entering the solenoid to induce an emf.
    So what is the best answer to the question?
     
  2. jcsd
  3. Jun 10, 2017 #2

    cnh1995

    User Avatar
    Homework Helper

    Or the speed of the magnet. It is measurable.
    ..and the resistance of the galvanometer.
     
  4. Jun 10, 2017 #3
    All of them are appropriate?
     
  5. Jun 10, 2017 #4

    rude man

    User Avatar
    Homework Helper
    Gold Member

    You could add the direction of the magnet's motion. Which direction will the galvanometer deflect if the magnet is (1) pushed in, and (2) pulled out? What about the direction of leaving the solenoid in each directon?
     
    Last edited: Jun 10, 2017
  6. Jun 10, 2017 #5

    cnh1995

    User Avatar
    Homework Helper

    Yes.
    Or the inductance of the solenoid. It includes all the physical parameters like number of turns, area, length, permeability etc.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Factors determining the sensitivity of a galvanometer
  1. Use galvanometer (Replies: 1)

Loading...