Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Magnetics question

2019 · 11 Jan · Shift 2 · Q69
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Magnetics
  5. /2019 · 11 Jan · Shift 2 · Q69

Magnetics question

2019 · 11 Jan · Shift 2 · Q69

JEE MainPhysicsMagneticsMCQ+4 / −1
The region between y = 0 and y = d contains a magnetic field B→=Bz^\overrightarrow B = B\widehat zB=Bz. A particle of mass m and charge q enters the region with a velocity v→=vi^.\overrightarrow v = v\widehat i.v=vi. If d =mv2qB,={{mv} \over {2qB}},=2qBmv​, the acceleration of the charged particle at the point of its emergence at the other side is :
  1. A
    qvBm(−32i^−12j^){{qvB} \over m}\left( -{{{\sqrt 3 } \over 2}\widehat i - {1 \over 2}\widehat j} \right)mqvB​(−23​​i−21​j​)
  2. B
    qvBm(12i^−32j^){{qvB} \over m}\left( {{1 \over 2}\widehat i - {{\sqrt 3 } \over 2}\widehat j} \right)mqvB​(21​i−23​​j​)
  3. C
    qvBm(−j^+i^2){{qvB} \over m}\left( {{{ - \widehat j + \widehat i} \over {\sqrt 2 }}} \right)mqvB​(2​−j​+i​)
  4. D
    qvBm(j^+i^2){{qvB} \over m}\left( {{{\widehat j + \widehat i} \over {\sqrt 2 }}} \right)mqvB​(2​j​+i​)
PreviousNext

More from Magnetics

  • A thin ring of 10 cm radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of 40 π rad s–1 about its axis, perpendicular to its plane. If the magnetic field at its centre is 3.8 × 10–9 T, then the…2019 · MCQ
  • An electron, moving along the x-axis with an initial energy of 100 eV, enters a region of magnetic field B=(1.5×10−3T)k at S (See figure). The field extends between x = 0 and x… Includes diagram2019 · MCQ
  • Find the magnetic field at point P due to a straight line segment AB of length 6 cm carrying a current of 5A. (See figure) (μ 0 = 4 π × 10–7 N-A–2) Includes diagram2019 · MCQ
  • As shown in the figure, two infinitely long, identical wires are bent by 90o and placed in such a way that the segments LP and QM are along the x-axis, while segments PS and QN are parallel to the y-axis. If OP = OQ = 4cm, and the… Includes diagram2019 · MCQ
  • A proton and an α-particle (with their masses in the ratio of 1 : 4 and charges in the ratio of 1 : 2) are accelerated from rest through a potential difference V. If a uniform magnetic field (B) is set up perpendicular to their…2019 · MCQ
  • A Helmholtz coil has a pair of loops, each with N turns and radius R. They are placed coaxially at distance R and the same current I flows through the loops in the same direction. P, midway between the centers A and C,… Includes diagram2018 · MCQ
  • A current of 1 A is flowing on the sides of an equilateral triangle of side 4.5 × 10-2 m. The magnetic field at the center of the triangle will be :2018 · MCQ
  • A charge q is spread uniformly over an insulated loop of radius r. If it is rotated with an angular velocity ω with resect to normal axis then the magnetic moment of the loop is :2018 · MCQ