When a current of (2.5±0.5) A flows through a wire, it develops a potential difference

When A Current Of 2505 A Flows Through A Wire Physics Question

When a current of (2.5±0.5) A flows through a wire, it develops a potential difference of (20±1) V, then the resistance of wire is

Options

(a) (8±2)Ω
(b) (8±1.6)Ω
(c) (8±1.5)Ω
(d) (8±3)Ω

Correct Answer:

(8±2)Ω

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

Related Questions:

  1. If the focal length of objective lens is increased, then magnifying power of
  2. CO₂ laser uses
  3. If a magnetic substance is kept in a magnetic field, then which of the following
  4. The force of repulsion between two electrons at a certain distance is F.
  5. A student measures the terminal potential difference (V) of a cell

Topics: Current Electricity (136)
Subject: Physics (2479)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

1 Comment on When a current of (2.5±0.5) A flows through a wire, it develops a potential difference

  1. R=V/I
    R=20/2.5
    R= 8 ohm

    Now,
    ∆ R/R=∆ V/V+∆I/I
    =1/20 +0.5/2.5
    = 1/4

    Therefore,
    ∆ R÷R=1÷4
    ∆ R=1÷4×R
    ∆R=1÷4×8
    ∆R=2

    Therefore,
    Resistance with error limits=R+ – ∆R
    =(8+ – 2)ohm

Leave a Reply

Your email address will not be published.


*