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

2007 · Q112
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. /2007 · Q112

Moving Charges and Magnetism question

2007 · Q112

NEETPhysicsMoving Charges and MagnetismMCQ+4 / −1
Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R. The time period of rotation of the particle
  1. A
    depends on R and not on v
  2. B
    is independent of both v and R
  3. C
    depends on both v and R
  4. D
    depends on v and not on R
View written solutionFree

Correct answer: B

For the circular motion in a cyclotron,

qvB=mv2r⇒qB=mω=m×2πTqvB = {{m{v^2}} \over r} \Rightarrow qB = m\omega = {{m \times 2\pi } \over T}qvB=rmv2​⇒qB=mω=Tm×2π​

∴T=2πmqB \therefore T = {{2\pi m} \over {qB}}∴T=qB2πm​ is independent of v and r.

PreviousNext

More from Moving Charges and Magnetism

  • The resistance of an ammeter is 13 Ω and its scale is graduated for a current upto 100 amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 amperes by this meter. The…2007 · MCQ
  • Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potential difference in volts should be applied across them so that the magnetic field at their…2006 · MCQ
  • When a charged particle moving with velocity v is subjected to a magnetic field of induction B, the force on it is non-zero. This implies that2006 · MCQ
  • 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