Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202124 Sep 2021Morning ShiftPhysicsMagnetic Effects of CurrentActual

A straight wire of diameter 0.4 ~mm carrying a current of 2 ~A is replaced by another wire of 0.8 ~mm diameter carrying the same current. The magnetic field at distance (R) from both the wires is ' B ₁ ' and ' B ₂ ' respectively. The relation between B ₁ and B ₂ is

Options

  1. AB ₁= B ₂ 2
  2. BB ₁= B ₂
  3. CB ₁=2 ~B ₂
  4. DB ₁= B ₂ 3

Correct answer

B. B ₁= B ₂

Step-by-step solution

Since the same current flows through the second wire, the magnetic field at the same distance will be same. B ₁= B ₂

Practice Magnetic Effects of Current on Quantrex Academy →

More from Magnetic Effects of Current

The current through the circular coil is halved and the radius of the coil is doubled. If B₁ and B₂ are respectively the initial and final magnetic field strength, then: 2026A circular coil of radius r = 10 ,cm having 300 turns carries a current of 2A. The coil is suspended vertically in a uniform magnetic field of strength 0.7 T. If the plane of the c 2026Two long parallel conductors X and Y are placed vertically at a distance d apart. Conductor X carries a current I upwards and conductor Y carries a current 2I downwards. A third lo 2026A proton is moving along negative X axis. If a uniform magnetic field is applied parallel to the positive Z axis, then choose the correct answer from the following options; 1. The 2026The magnetic field at the centre of a wire loop formed by two semicircular wires of radii r₁ = 3.14m and r₂ = 6.28m and carrying a current of I =2A is: 2026If a wire of length ' L ' carrying a current ' i ' is bent in the shape of a semi-circular arc as shown in the figure, then the magnetic field at centre of the arc is 2025If a current of 15 A passes through a solenoid of length 25 cm, radius 2 cm and number of turns 500, then the magnetic moment of the solenoid is 2025The maximum magnetic field produced by a current of 12 A passing through a copper wire of diameter 1.2 mm is 2025 Full Magnetic Effects of Current list All MHT CET PYQs