Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Olympiad workbookNSEPMagnetic Effects of Current

An insulating rod of length/carries a charge q distributed uniformly all over its length. The rod is pivoted at its midpoint and is rotated at a frequency f( in Hz ) about an axis perpendicular to the rod passing through the point at the pivot. The magnetic moment of the system is

Options

  1. A1 12 q f ^2
  2. B1 6 q f ^2
  3. C1 3 q f ^2
  4. Dr ^2 R ^2

Correct answer

A. 1 12 q f ^2

Step-by-step solution

No Solution

Practice Magnetic Effects of Current on Quantrex Academy →

More from Magnetic Effects of Current

A wire in the shape of a square frame carries a current I and produces a magnetic field B_ s at its centre. Now the wire is bent in the shape of a circle and carries the same curreA coil 2.0 cm in diameter has 300 turns. If the coil carries a current of 10 mA and lies in a magnetic field 5 10⁻² ~T , the maximum torque experienced by the coil isAn infinitely long straight non-magnetic conducting wire of radius a carries a dc current I . The magnetic field B , at a distance r(r < a) from axis of the wire isA neutral metal bar moves at a constant velocity v to the right through a region of uniform magnetic field directed out of the page, as shown. Therefore,Paragraph: The following questions are concerned with experiments on the characterization and use of a moving coil galvanometer. The series combination of a variable resistance R ,A rectangular loop carrying a current is placed in a uniform magnetic field. The net force acting on the loopThe SI unit of permeability of free space isA tightly wound long solenoid carries a current 5 A . An electron shot perpendicular to the solenoid axis inside it revolves at a frequency 10^8 rev / s . The number of turns per m Full Magnetic Effects of Current list All Olympiad workbook PYQs