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

A U-shaped conducting wire of mass m=10 g , having length of its horizontal section as =20 ~cm , is free to move vertically up and down. The two ends of the wire are immersed in mercury for proper electrical contact. The wire is in a homogeneous field of magnetic induction B=0.1 T as shown. The wire jumps up to a height h=3 m when a charge q , in the form of a current pulse, is sent through the wire. Considering that

Options

  1. A6.85 C
  2. B9.80 C
  3. C2.84 C
  4. D3.84 C

Correct answer

D. 3.84 C

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