Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Current Electricity question

2024 · Q162
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Current Electricity
  5. /2024 · Q162

Current Electricity question

2024 · Q162

NEETPhysicsCurrent ElectricityMCQ+4 / −1

A uniform wire of diameter ddd carries a current of 100 mA100 \mathrm{~mA}100 mA when the mean drift velocity of electrons in the wire is vvv. For a wire of diameter d2\frac{d}{2}2d​ of the same material to carry a current of 200 mA200 \mathrm{~mA}200 mA, the mean drift velocity of electrons in the wire is

  1. A
    4v4 v4v
  2. B
    8v8 v8v
  3. C
    vvv
  4. D
    2v2 v2v
PreviousNext

More from Current Electricity

  • A uniform metal wire of length l has 10Ω resistance. Now this wire is stretched to a length 2l and then bent to form a perfect circle. The equivalent resistance across any arbitrary diameter of that circle is2024 · MCQ
  • The given circuit shows a uniform straight wire AB of 40 cm length fixed at both ends. In order to get zero reading in the galvanometer G, the free end of J is to be placed from B at: Includes diagram2024 · MCQ
  • A certain wire A has resistance 81 Ω. The resistance of another wire B of same material and equal length but of diameter thrice the diameter of A will be :2023 · MCQ
  • A copper wire of radius 1 mm contains 1022 free electrons per cubic metre. The drift velocity for free electrons when 10 A current flows through the wire will be (Given, charge on electron =1.6×10−19C…2023 · MCQ
  • The emf of a cell having internal resistance 1Ω is balanced against a length of 330 cm on a potentiometer wire. When an external resistance of 2Ω is connected across the cell, the balancing length will be :2023 · MCQ
  • The magnitude and direction of the current in the following circuit is :- Includes diagram2023 · MCQ
  • If the galvanometer G does not show any deflection in the circuit shown, the value of R is given by: Includes diagram2023 · MCQ
  • Resistance of a carbon resistor determined from colour codes is (22000±5%)Ω. The colour of third band must be :2023 · MCQ