Home
Class 12
PHYSICS
A mass m=20 g has a charge q= 3.0 mC. It...

A mass `m=20 g` has a charge `q= 3.0 mC`. It moves with a velocity of 20 m/s and enters a region of electric field of 80 N/C in the same direction as the velocity of the mass. The velocity of the mass after 3 s in this region is

A

`80 ms^(-1)`

B

`56 ms^(-1)`

C

`44 ms^(-1)`

D

`40 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATICS

    DC PANDEY|Exercise Assertion and Reason|15 Videos

  • ELECTROSTATICS

    DC PANDEY|Exercise Match the columns|5 Videos

  • ELECTROSTATICS

    DC PANDEY|Exercise Check point 1.5|20 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITORS

    DC PANDEY|Exercise (C) Chapter exercises|50 Videos

  • GRAVITATION

    DC PANDEY|Exercise All Questions|120 Videos

Similar Questions

Explore conceptually related problems

A particle of mass m and charge Q moving with a velocity v enters a region on uniform field of induction B Then its path in the region is s

A body of mass 20 kg is moving with a velocity of 2v and another body of mass 10 kg is moving with velocity V along same direction. The velocity of their centre of mass is

A charged particle of charge 2 muC and mass 10 milligram, moving with a velocity of 1000 m//s enters a uniform electric field of strength 10^(3) N//C directed perpendicular to its direction of motion. Find the velocity and displacement of the particle after 10s .

Two bodies of masses 2 kg and 4 kg are moving with velocities 2 m/s and 10 m/s respectively along same direction. Then the velocity of their centre of mass will be

A ball of mass 10 kg is moving with a velocity of 10 m / s . It strikes another ball of mass 5 kg which is moving in the same direction with a velocity of 4 m / s . If the collision is elastic, their velocities after the collision will be, respectively

A body of mass 0.1 kg travelling with a velocity of 5 m/s, collides head-on with another body of mass 0.2 kg travelling in the same direction with a velocity of 1.2 m/s. If the two bodies stick together after collision, their common velocity is

A ball of mass 4 kg moving with a velocity of 12 m//s impinges directly on another ball of mass 8 kg moving with velocity of 4 m//s in the same direction. Find their velocities after impact and calculate the loss of KE due to impact if e =0.5 .

An electron (charge q coulomb) enters a magnetic field of H "weber"//m^(2) with a velocity of vm//s in the same direction as that of the field the force on the electron is

DC PANDEY-ELECTROSTATICS-Taking it together
  1. The point charges Q and -2Q are placed at some distance apart. If the ...

    Text Solution

    |

  2. A ball with charge -50 e is placed at the centre of a hollow spherical...

    Text Solution

    |

  3. A mass m=20 g has a charge q= 3.0 mC. It moves with a velocity of 20 m...

    Text Solution

    |

  4. Two parallel metal plates having charges +Q and -Q face each other at ...

    Text Solution

    |

  5. A square surface of side L metre in the plane of the paper is placed i...

    Text Solution

    |

  6. Three concentric metallic spherical shells of radii R, 2R, 3R are give...

    Text Solution

    |

  7. If a charged particle is projected on a rough horizontal surface with ...

    Text Solution

    |

  8. Electric charges q, q, –2q are placed at the corners of an equilateral...

    Text Solution

    |

  9. A point charge +q is placed at a distance d from an isolated conductin...

    Text Solution

    |

  10. Under the influence of the Coulomb field of charge +Q, a charge -q is ...

    Text Solution

    |

  11. Two identical conducting sphere carrying different charges attact each...

    Text Solution

    |

  12. The electric field at a distance 3R//2 from the centre of a charge con...

    Text Solution

    |

  13. Under the action of a given coulombic force the acceleration of an ele...

    Text Solution

    |

  14. A drop of 10^(-6) kg water carries 10^(-6) C charge. What electric fie...

    Text Solution

    |

  15. If linear charge density of a wire as shown in the figure is lambda

    Text Solution

    |

  16. Figure below show regular hexagons with charges at the vertices. In w...

    Text Solution

    |

  17. Electric field intensity at a point in between two parallel sheets wit...

    Text Solution

    |

  18. The electric charges are distributed in a small volume. The flux of th...

    Text Solution

    |

  19. Two charges of -4 muC and +4muC are placed at the points A (1,0,4) an...

    Text Solution

    |

  20. An infinite line charge produces a field of 7.182 xx 10^(8) N//C at di...

    Text Solution

    |