Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 x 10⁻² C

Two Metallic Spheres Of Radii 1 Cm And 3 Cm Physics Question

Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 x 10⁻² C and 5 x 10⁻² C, respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is:

Options

(a) 2 x 10⁻² C
(b) 3 x 10⁻² C
(c) 4 x 10⁻² C
(d) 1 x 10⁻² C

Correct Answer:

3 x 10⁻² C

Explanation:

At equilibrium potential of both sphere becomes same if charge of sphere one x where Q= 4 x 10 10⁻² C
v₁ = v₂ kx / 1cm = k(Q – x) / 3 cm
3x = Q – x 4x = Q
x = Q/4 = 4 x 10⁻² / 4 C = 1 x 10⁻²
Q’ = Q – x = 3 x 10⁻² C

Related Questions:

  1. A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10cm
  2. A steady current of 1.5 amp flows through a copper voltmeter for 10 minutes
  3. A conducting square frame of side ‘a’ and a long straight wire carrying current I
  4. If alternating source of primary coil on transformer is replaced by a Laclanche cell
  5. Bragg’s law for X-rays is

Topics: Electrostatics (146)
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

Be the first to comment

Leave a Reply

Your email address will not be published.


*