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Magnetism question

2021 · Shift 2 · Q44
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Magnetism question

2021 · Shift 2 · Q44

JEE AdvancedPhysicsMagnetismMultiple correct+4 / −2
Two concentric circular loops, one of radius R and the other of radius 2R, lie in the xy-plane with the origin as their common center, as shown in the figure. The smaller loop carries current I1 in the anti-clockwise direction and the larger loop carries current I2 in the clockwise direction, with I2 > 2I1. B→\overrightarrow BB(x, y) denotes the magnetic field at a point (x, y) in the xy-plane. Which of the following statement(s) is(are) correct? JEE Advanced 2021 Paper 2 Online Physics - Magnetism Question 30 English
  1. A
    B→\overrightarrow BB(x, y) is perpendicular to the xy-plane at any point in the plane
  2. B
    | B→\overrightarrow BB(x, y) | depends on x and y only through the radial distance r=x2+y2r = \sqrt {{x^2} + {y^2}}r=x2+y2​
  3. C
    | B→\overrightarrow BB(x, y) | is non-zero at all points for r < R
  4. D
    B→\overrightarrow BB(x, y) points normally outward from the xy-plane for all the points between the two loops
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