Home
Class 12
PHYSICS
A particle of charge q and velocity v pa...

A particle of charge `q` and velocity v passes undeflected through a space with non-zero electric field E and magnetic field B. The undeflecting conditions will hold, if

A

signs of both q and E are reversed

B

signs of both q and B are reversed

C

Both B and E are changed in magnitude but keeping the product of B and E fixed

D

Both B and E are doubled in magnitude

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC FIELD AND FORCES

    DC PANDEY|Exercise Assertion and reason|20 Videos

  • MAGNETIC FIELD AND FORCES

    DC PANDEY|Exercise Match the following|4 Videos

  • MAGNETIC FIELD AND FORCES

    DC PANDEY|Exercise Check point|54 Videos

  • INTERFERENCE AND DIFFRACTION OF LIGHT

    DC PANDEY|Exercise Level 2 Subjective|5 Videos

  • MAGNETICS

    DC PANDEY|Exercise MCQ_TYPE|1 Videos

Similar Questions

Explore conceptually related problems

A proton (or charged particle) moving with velocity v is acted upon by electric field E and magnetic field B . The proton will move underflected if

Write the expression for the force vecF , acting on a charged particle of charge q moving with a velocity vecv in the pressure of both electric field vecE and magnetic field vecB . Obtain the condition under which the particle moves undeflected through the fields.

A charged particle with a velocity 2xx10^(3) ms^(-1) passes undeflected through electric field and magnetic fields in mutually perpendicular directions. The magnetic field is 1.5 t. the magnitude of electric field will be

A charged particle moving with velocity vis subjected to electric field E and magnetic field B. The particle will go undeflected if

A particle of charge q and mass m is moving along the x-axis with a velocity v and enters a region of electric field E and magnetic field B as shown in figures below. For which figure the net force on the charge may be zero?

A charge q moves region in a electric field E and the magnetic field B both exist, then the force on its is

DC PANDEY-MAGNETIC FIELD AND FORCES-Taking it together
  1. A long thin hollow metallic cylinder of radius 'R' has a current i amp...

    Text Solution

    |

  2. In hydrogen atom, an electron is revolving in the orbit of radius 0.53...

    Text Solution

    |

  3. A particle of charge q and velocity v passes undeflected through a spa...

    Text Solution

    |

  4. The magnetic field at the centre of a circular coil of radius r carryi...

    Text Solution

    |

  5. Three long straight wires A, B and C are carrying current as shown in ...

    Text Solution

    |

  6. A wire of length 2 m carrying a current of 1 A is bend to form a circl...

    Text Solution

    |

  7. A current carrying conductor of length l is bent into two loops one by...

    Text Solution

    |

  8. Two charged particles traverse identical helical paths in a completely...

    Text Solution

    |

  9. When a certain length of wire is turned into one circular loop, the ma...

    Text Solution

    |

  10. A long solenoid carrying a current I is placed with its axis vertical ...

    Text Solution

    |

  11. A proton moves at a speed v = 2xx10^(6) m//s in a region of constant m...

    Text Solution

    |

  12. An electric current I enters and leaves a uniform circular wire of rad...

    Text Solution

    |

  13. A particle of mass m and charge q moves with a constant velocity v alo...

    Text Solution

    |

  14. A proton of mass 1.67xx10^(-27) kg charge 1.6xx10^(-19) C is projected...

    Text Solution

    |

  15. An equilateral triangle of side length l is formed from a piece of wir...

    Text Solution

    |

  16. An infinitely long conductor is bent into a circle as shown in figure....

    Text Solution

    |

  17. Magnetic field produced at the point O due to current flowing in an in...

    Text Solution

    |

  18. Two identical coils carry equal currents have a common centre and thei...

    Text Solution

    |

  19. A circular flexible loop of wire of radius r carrying a current I is p...

    Text Solution

    |

  20. An electron moves in a circular orbit with a uniform speed v.It produc...

    Text Solution

    |