Home
Class 11
PHYSICS
A particle of charge q and mass m starts...

A particle of charge q and mass m starts moving from the origin under the action of an electric field `vec E = E_0 hat i and vec B = B_0 hat i` with a velocity `vec v = v_0 hat j`. The speed of the particle will become `2v_0` after a time.

A

`t= (2mv_(0))/(qE)`

B

`t= (2Bq)/(mv_(0))`

C

`t= (sqrt3Bq)/(mv_(0))`

D

`t= (sqrt3mv_(0))/(qE)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    DC PANDEY|Exercise More than One Option is Correct|25 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    DC PANDEY|Exercise Comprehension type Questions|16 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    DC PANDEY|Exercise Integer type Questions|10 Videos

  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Level 2 Subjective|18 Videos

  • MEASUREMENT AND ERRORS

    DC PANDEY|Exercise Subjective|19 Videos

Similar Questions

Explore conceptually related problems

A particle of charge q and mass m starts moving from the origin under the action of an electric field vecE=E_0 hat i and vec B=B_0 hat i with velocity vec v=v_0 hat j . The speed of the particle will become 2v_0 after a time

The electric field acts positive x -axis. A charged particle of charge q and mass m is released from origin and moves with velocity vec(v)=v_(0)hatj under the action of electric field and magnetic field, vec(B)=B_(0)hati . The velocity of particle becomes 2v_(0) after time (sqrt(3)mv_(0))/(sqrt(2)qE_(0)) . find the electric field:

A particle having mass m and charge q is released from the origin in a region in which electric field and megnetic field are given by vec(B) = -B_(0)hat(j) and vec(E) = vec(E)_(0)hat(k) . Find the speed of the particle as a function of its z -coordinate.

Charge Q is given a displacement vec r = a hat i + b hat j in an electric field vec E = E_1 hat i + E_2 hat j . The work done is.

A particle of mass m and charge q is moving in a region where uniform, constant electric and mangetic fields vec E and vec B are present. vec E and vec B are parallel to each other. At time t=0, the velocity vec v_0 of the particle is perpendicular to vec E (Assume that its speed is always lt lt c , the speed of light in vacuum). Find the velocity vec v of the particle at time t . You must express your answer in terms of t, q, m, the vector vec v_0, vec E and vec B and their magnitudes vec v_0, vec E and vec B .

A charged particle of specific charge (charge/mass) alpha released from origin at time t=0 with velocity vec v = v_0 (hat i + hat j) in uniform magnetic field vec B = B_0 hat i. Coordinates of the particle at time t= pi//(B_0 alpha) are

In a region of space , suppose there exists a uniform electric field vec(E ) = 10 hat(i) ( V /m) . If a positive charge moves with a velocity vec(v ) = -2 hat(j) , its potential energy

Electric field and magnetic field in a region of space are given by (Ē= E_0 hat j) . and (barB = B_0 hat j) . A charge particle is released at origin with velocity (bar v = v_0 hat k) then path of particle is

DC PANDEY-MAGNETIC EFFECT OF CURRENT AND MAGNETISM-Only One Option is Correct
  1. The dimensions of (B^(2)R^(2)C^(2))/(2mu(0)) (Where B is magnetic f...

    Text Solution

    |

  2. A conducting rod of length l and mass m is moving down a smooth inclin...

    Text Solution

    |

  3. A particle of charge q and mass m starts moving from the origin under ...

    Text Solution

    |

  4. A rigid circular loop of radius r and mass m lies in the XY- plane of ...

    Text Solution

    |

  5. A current carrying squre loop is placed near an infinitely long curre...

    Text Solution

    |

  6. A conducting rod of mass m and length l is placed over a smooth horizo...

    Text Solution

    |

  7. A particle of charge per unit mass alpha is released from origin with ...

    Text Solution

    |

  8. The x -co- ordinates of the particle at time t (gt(pi)/(3B(0)alpha))...

    Text Solution

    |

  9. Two wires AO and OC carry equal currents i as shown in Fig. One end of...

    Text Solution

    |

  10. Figure shows a square current carrying loop ABCD of side 2m and curren...

    Text Solution

    |

  11. A conducting ring of mass 2kg and radius 0.5m is placed on a smooth pl...

    Text Solution

    |

  12. A charge praticule of sepeific charge (charge/ mass ) alpha is rea...

    Text Solution

    |

  13. Magnetic moment of an electron in nth orbit of hydrogen atom is

    Text Solution

    |

  14. Two very long straight parallel wires carry steady currents i and 2i i...

    Text Solution

    |

  15. In Fig. a coil of single turn is wound on a sphere of radius r and mas...

    Text Solution

    |

  16. A particule having charge q enters a rection of untiormal magnetic...

    Text Solution

    |

  17. A particle of specific charge (charge/mass) alpha starts moving from t...

    Text Solution

    |

  18. A conducting wire bent in the from of a parabola y^(2)=2x carries a cu...

    Text Solution

    |

  19. A rectangular loop PQRS made from a uniform wire has length a, width b...

    Text Solution

    |

  20. A conducting circular loop of radius r carries a constant current i. I...

    Text Solution

    |