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: D.c. circuit

  1. Jun 21, 2004 #1
    a dual-range d.c. voltmeter has a common negative terminal and two positive terminals, one of which gives full deflection of 10V, and the other of full deflection 3V. Given that the voltmeter resistance btw negative terminal & the other of full deflection of +3V is 1000 ohm. what is the resistance btw negative terminal and terminal of +10V?

    i use V is proportional to R method.
    3V ---> 1000 ohm
    10V ---> 3333 ohm

    is that the working. the answer is correct, but i doubt if the working is just like that. thank you.
  2. jcsd
  3. Jun 21, 2004 #2
    soory. i want to cancel the above question. i should ask this question

    two bulbs P and Q labelled 12V, 24W and 12V, 36W respectively are connected in series with a battery 24V. why p.d. across P > p.d. across Q ? i dont really understand this fact. can someone explain
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook