Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Moving Charges and Magnetism question

2006 · Q136
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Moving Charges and Magnetism
  5. /2006 · Q136

Moving Charges and Magnetism question

2006 · Q136

NEETPhysicsMoving Charges and MagnetismMCQ+4 / −1
When a charged particle moving with velocity v→\overrightarrow vv is subjected to a magnetic field of induction B→\overrightarrow BB, the force on it is non-zero. This implies that
  1. A
    angle between is either zero or 180o
  2. B
    angle between is necessarily 90o
  3. C
    angle between can have any value other than 90o
  4. D
    angle between can have any value other than zero and 180o.
View written solutionFree

Correct answer: D

Force on a particle moving with velocity v→\overrightarrow v v in a magnetic field B→\overrightarrow B B is

F→=q(v→×B→)\overrightarrow F = q\left( {\overrightarrow v \times \overrightarrow B } \right)F=q(v×B)

⇒\Rightarrow⇒ F = qvBsinθ\theta θ

(i) When θ\theta θ = 0°, F = qvBsin0° = 0

(ii) When θ\theta θ = 90°, F = qvBsin90° = qvB

(iii) When θ\theta θ = 180°, F = qvBsin180° = 0

If angle between v and B is either zero or 180º, then value of F will be zero.

PreviousNext

More from Moving Charges and Magnetism

  • An electron moves in a circular orbit with a uniform speed v. It producess a magnetic field B at the centre of the circle. The radius of the circle is proportional to2005 · MCQ
  • A very long straight wire carries a current I. At the instant when a charge +Q at point P has velocity v, as shown, the force on the charge is Includes diagram2005 · MCQ
  • A galvanometer of 50 ohm resistance has 25 divisions. A current of 4 × 10−4 ampere gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a…2004 · MCQ
  • To convert a galvanometer into a voltmeter one should connect a2004 · MCQ
  • A long solenoid carrying a current producess a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is2003 · MCQ
  • A charged particle moves through a magnetic field in a firection perpendicular to it. Then the2003 · MCQ
  • To convert a galvanometer into a voltmeter one should connect a2002 · MCQ
  • A charge q moves in a region where electric field and magnetic field both exist, then force on it is2002 · MCQ