Physics-
General
Easy

Question

A large number of infinite long thin wires each carrying current i0 are kept along z-axis. Then the value of magnetic field ‘B’, at any point ‘P’ at a distance ‘x’ from O varies as

  1. B proportional to x    
  2. B proportional to fraction numerator 1 over denominator x end fraction    
  3. B is independent of x    
  4. B proportional to fraction numerator 1 over denominator x to the power of 2 end exponent end fraction    

The correct answer is: B is independent of x


    B is independent of ‘x’ for large number of wires.

    Related Questions to study

    General
    Physics-

    Two fixed long conducting wires cross each other perpendicularly so that they do not actually touch but are close to each other as shown in the figure. Equal current i exist in each wire in the directions indicated. In what region(s) will there be some points with zero net magnetic field?

    Two fixed long conducting wires cross each other perpendicularly so that they do not actually touch but are close to each other as shown in the figure. Equal current i exist in each wire in the directions indicated. In what region(s) will there be some points with zero net magnetic field?

    Physics-General
    General
    Physics-

    A tube of uniform cross-section A is bent to form a circular arc of radius R, forming three quarters of a circle. A liquid of density rho is forced through the tube with a linear speed v as shown in figure. The net force exerted by the liquid on the tube is

    A tube of uniform cross-section A is bent to form a circular arc of radius R, forming three quarters of a circle. A liquid of density rho is forced through the tube with a linear speed v as shown in figure. The net force exerted by the liquid on the tube is

    Physics-General
    General
    Physics-

    In the figure shown a particle of mass m moving with velocity v strike a wall (mass is infinitely large) moving towards the particle with same speed The work done on the particle during collision is

    In the figure shown a particle of mass m moving with velocity v strike a wall (mass is infinitely large) moving towards the particle with same speed The work done on the particle during collision is

    Physics-General
    parallel
    General
    Physics-

    Three rods of the same mass are placed as shown in the figure. What will be the co-ordinates of the center of mass of the system ?

    Three rods of the same mass are placed as shown in the figure. What will be the co-ordinates of the center of mass of the system ?

    Physics-General
    General
    Physics-

    A ball moving with a velocity v strikes a wall moving towards the ball with a velocity u as shown in fig. An elastic impact occurs. Consider the mass of the wall to be infinitely great. The work done by the wall during collision is

    A ball moving with a velocity v strikes a wall moving towards the ball with a velocity u as shown in fig. An elastic impact occurs. Consider the mass of the wall to be infinitely great. The work done by the wall during collision is

    Physics-General
    General
    Physics-

    A tube of uniform cross-section A is bent to form a circular arc of radius R, forming three quarters of a circle. A liquid of density rho is forced through the tube with a linear speed v as shown in figure. The net force exerted by the liquid on the tube is

    A tube of uniform cross-section A is bent to form a circular arc of radius R, forming three quarters of a circle. A liquid of density rho is forced through the tube with a linear speed v as shown in figure. The net force exerted by the liquid on the tube is

    Physics-General
    parallel
    General
    Physics-

    In the figure shown a particle of mass m moving with velocity v strike a wall ( mass is infinitely large) moving towards the particle with same speed The work done on the particle during collision is

    In the figure shown a particle of mass m moving with velocity v strike a wall ( mass is infinitely large) moving towards the particle with same speed The work done on the particle during collision is

    Physics-General
    General
    Physics-

    Three rods of the same mass are placed as shown in the figure. What will be the co-ordinates of the center of mass of the system ?

    Three rods of the same mass are placed as shown in the figure. What will be the co-ordinates of the center of mass of the system ?

    Physics-General
    General
    Physics-

    A ball moving with a velocity v strikes a wall moving towards the ball with a velocity u as shown in fig. An elastic impact occurs. Consider the mass of the wall to be infinitely great. The work done by the wall during collision is

    A ball moving with a velocity v strikes a wall moving towards the ball with a velocity u as shown in fig. An elastic impact occurs. Consider the mass of the wall to be infinitely great. The work done by the wall during collision is

    Physics-General
    parallel
    General
    Physics-

    Six identical balls are lined in a straight groove made on a horizontal frictionless surface as shown. Two similar balls each moving with a velocity v collide elastically with the row of 6 balls from left. What will happen

    Six identical balls are lined in a straight groove made on a horizontal frictionless surface as shown. Two similar balls each moving with a velocity v collide elastically with the row of 6 balls from left. What will happen

    Physics-General
    General
    Physics-

    A body of mass 2 kg slides down a curved track which is quadrant of a circle of radius 1 metre. All the surfaces are frictionless. If the body starts from rest, its speed at the bottom of the track is

    A body of mass 2 kg slides down a curved track which is quadrant of a circle of radius 1 metre. All the surfaces are frictionless. If the body starts from rest, its speed at the bottom of the track is

    Physics-General
    General
    Physics-

    The relationship between the force F and position x of a body is as shown in figure. The work done in displacing the body from x = 1 m to x = 5 m will be

    The relationship between the force F and position x of a body is as shown in figure. The work done in displacing the body from x = 1 m to x = 5 m will be

    Physics-General
    parallel
    General
    Physics-

    A particle of mass m moving with a velocity u makes an elastic one dimensional collision with a stationary particle of mass m establishing a contact with it for extremely small time T. Their force of contact increases from zero to F0 linearly in time fraction numerator T over denominator 4 end fraction, remains constant for a further time fraction numerator T over denominator 2 end fraction and decreases linearly from F0 to zero in further time fraction numerator T over denominator 4 end fraction as shown. The magnitude possessed by F0 is

    A particle of mass m moving with a velocity u makes an elastic one dimensional collision with a stationary particle of mass m establishing a contact with it for extremely small time T. Their force of contact increases from zero to F0 linearly in time fraction numerator T over denominator 4 end fraction, remains constant for a further time fraction numerator T over denominator 2 end fraction and decreases linearly from F0 to zero in further time fraction numerator T over denominator 4 end fraction as shown. The magnitude possessed by F0 is

    Physics-General
    General
    Physics-

    The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with the above spring of half length, the line OA will

    The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with the above spring of half length, the line OA will

    Physics-General
    General
    Physics-

    Figure shows the F-x graph. Where F is the force applied and x is the distance covered

    by the body along a straight line path. Given that F is in newton and x in metre, what is the work done ?

    Figure shows the F-x graph. Where F is the force applied and x is the distance covered

    by the body along a straight line path. Given that F is in newton and x in metre, what is the work done ?

    Physics-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.