Physics-
General
Easy

Question

Two long straight wires are set parallel to each other. Each carries a current i in the opposite direction and the separation between them is 2R. The intensity of the magnetic field midway between them is

  1. Zero    
  2. fraction numerator mu subscript 0 end subscript i over denominator 4 pi R end fraction    
  3. fraction numerator mu subscript 0 end subscript i over denominator 2 pi R end fraction    
  4. fraction numerator mu subscript 0 end subscript i over denominator pi R end fraction    

The correct answer is: fraction numerator mu subscript 0 end subscript i over denominator pi R end fraction


    Magnetic field at mid-point due to wire A B
    B subscript 1 end subscript equals fraction numerator mu subscript 0 end subscript i over denominator 2 pi R end fraction
    Magnetic field at mid-point due to wire C D
    B subscript 2 end subscript equals fraction numerator mu subscript 0 end subscript i over denominator 2 pi R end fraction
    Resultant of Magnetic field B equals B subscript 1 end subscript plus B subscript 2 end subscript
    equals fraction numerator mu subscript 0 end subscript i over denominator 2 pi R end fraction plus fraction numerator mu subscript 0 end subscript i over denominator 2 pi R end fraction
    B equals fraction numerator mu subscript 0 end subscript i over denominator pi R end fraction

    Related Questions to study

    General
    physics-

    A current of 10 A is passing through a long wire which has semicircular loop of the radius 20 cm as shown in the figure. Magnetic field produced at the centre of the loop is

    A current of 10 A is passing through a long wire which has semicircular loop of the radius 20 cm as shown in the figure. Magnetic field produced at the centre of the loop is

    physics-General
    General
    physics-

    In the figure shown, the magnetic field induction at the point O will be

    In the figure shown, the magnetic field induction at the point O will be

    physics-General
    General
    physics-

    PQ and RS are long parallel conductors separated by certain distance. M is the mid-point between them (see the figure). The net magnetic field at M is B. Now, the current 2A is switched off. The field at M now becomes

    PQ and RS are long parallel conductors separated by certain distance. M is the mid-point between them (see the figure). The net magnetic field at M is B. Now, the current 2A is switched off. The field at M now becomes

    physics-General
    parallel
    General
    physics-

    Current through ABC and A’ B’ C’ is I. What is the magnetic field at P? B P equals P B to the power of ´ end exponent equals r (Here C’ B’ PBC are collinear)

    Current through ABC and A’ B’ C’ is I. What is the magnetic field at P? B P equals P B to the power of ´ end exponent equals r (Here C’ B’ PBC are collinear)

    physics-General
    General
    physics

    The ratio of pathlength and the respective time interval is

    The ratio of pathlength and the respective time interval is

    physicsGeneral
    General
    physics

    A particle is thrown in upward direction with initial velocity of 60 m/s. Find average speed and average velocity after 10 seconds. [g =10 MS2]

    A particle is thrown in upward direction with initial velocity of 60 m/s. Find average speed and average velocity after 10 seconds. [g =10 MS2]

    physicsGeneral
    parallel
    General
    physics-

    The work done in deforming body is given by

    The work done in deforming body is given by

    physics-General
    General
    physics-

    A wire of length 2 L and radius r is stretched between A and B without the application of any tension. If Y is the Young’s modulus of the wire and it is stretched like A C B, then the tension in the wire will be

    A wire of length 2 L and radius r is stretched between A and B without the application of any tension. If Y is the Young’s modulus of the wire and it is stretched like A C B, then the tension in the wire will be

    physics-General
    General
    physics-

    A cube of aluminium of sides 0.1 m is subjected to a sharing force of 100 N. The top face of the cube is displaced through 0.02 cm with respect to the bottom face. The shearing strain would be

    A cube of aluminium of sides 0.1 m is subjected to a sharing force of 100 N. The top face of the cube is displaced through 0.02 cm with respect to the bottom face. The shearing strain would be

    physics-General
    parallel
    General
    physics-

    A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is

    A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is

    physics-General
    General
    physics-

    The graph shows the behaviour of a length of wire in the region for which the substance obeys Hooke’s law. P and Q represent

    The graph shows the behaviour of a length of wire in the region for which the substance obeys Hooke’s law. P and Q represent

    physics-General
    General
    physics-

    If the shear modulus of a wire material is 5.9blank cross times 10 to the power of 11 end exponent d y n e blank c m to the power of negative 2 end exponent then the potential energy of a wire of 4 cross times 10 to the power of 3 end exponent c m in diameter and 5 cm long twisted through an angle of 10’ , is

    If the shear modulus of a wire material is 5.9blank cross times 10 to the power of 11 end exponent d y n e blank c m to the power of negative 2 end exponent then the potential energy of a wire of 4 cross times 10 to the power of 3 end exponent c m in diameter and 5 cm long twisted through an angle of 10’ , is

    physics-General
    parallel
    General
    physics-

    The Young’s modulus of the material of a wire is equal to the

    The Young’s modulus of the material of a wire is equal to the

    physics-General
    General
    Maths-

    y equals f left parenthesis x right parenthesis equals fraction numerator x over denominator 1 plus vertical line x vertical line end fraction comma x element of R comma y element of R text  is  end text

    y equals f left parenthesis x right parenthesis equals fraction numerator x over denominator 1 plus vertical line x vertical line end fraction comma x element of R comma y element of R text  is  end text

    Maths-General
    General
    physics-

    Two short bar magnets of equal dipole moment M are fastened perpendicularly at their centers, figure. The magnitude of resultant of two magnetic field at a distance d from the center on the bisector of the right angle is

    Two short bar magnets of equal dipole moment M are fastened perpendicularly at their centers, figure. The magnitude of resultant of two magnetic field at a distance d from the center on the bisector of the right angle is

    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.