Home
Class 12
PHYSICS
If an electron is not deflected in passi...

If an electron is not deflected in passing through a certain region of space can we be sure that there is no magnetic field in that region?

Text Solution

Verified by Experts

No. The electron may be moving parallel to the direction of magnetic field.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETICS

    AAKASH SERIES|Exercise PROBLEMS (LEVEL -I)|40 Videos

  • ELECTROMAGNETICS

    AAKASH SERIES|Exercise PROBLEMS (LEVEL -II)|40 Videos

  • ELECTROMAGNETICS

    AAKASH SERIES|Exercise EXERCISE (SHORT ANSWER QUESTIONS)|6 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH SERIES|Exercise EXERCISE -II|22 Videos

  • ELECTROSTATICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (PRACTICE SHEET (ADVANCED) INTEGER TYPE QUESTIONS)|5 Videos

Similar Questions

Explore conceptually related problems

If a moving electron if deflected sideways in passing through a certain region of space, can we be sure that a magnetic field exists in that region?

An electron is not deflected an through a certain region because

(A) : If an electron is not deflected while passing through a certain region of space, then only possibility is that there is no magnetic field in this region (R) : Force on an electron moving in a magnetic field is inversely proportional to the magnetic field applied.

(A) : If an electron is not deflected while passing through a certain region of space, then only possibility is that there is no magnetic field in this region. (R) : Magnetic force on a charged particle is directly proportional to specific charge of particle.

If a beam of electrons travels in a straight line in a certain region. Can we say there is no magnetic field?

An electron does not suffer any deflection while passing through a region of uniform magnetic field. What is the direction of the magnetic field ?

The average electric field of electromagnetic waves in certain region of free space is 9 xx 10^(–4) NC^(–1) . Then the average magnetic field in the same region is of the order of

Assertion A beam of electron can pass undeflected through a region of E and B. Reason Force on moving charged particle due to magnetic field may be zero in some cases.

A beam consisting of protons and electrons moving at the same speed goes through athin region in which there is a magnetic field perpendicular to the beam. Protons and the electrons

Following experiment was performed by J.J. Thomson in order to measure ratio of charge e and mass m of electron. Electrons emitted from a hot filament are accelerated by a potential difference V. As the electrons pass through deflecting plates, they encounter both electric and magnetic fields. the entire region in which electrons leave the plates they enters a field free region that extends to fluorescent screen. The entire region in which electrons travel is evacuated. Firstly, electric and magnetic fields were made zero and position of undeflected electron beam on the screen was noted. The electric field was turned on and resulting deflection was noted. Deflection is given by d_(1) = (eEL^(2))/(2mV^(2)) where L = length of deflecting plate and v = speed of electron. In second part of experiment, magnetic field was adjusted so as to exactly cancel the electric force leaving the electron beam undeflected. This gives eE = evB . Using expression for d_(1) we can find out (e)/(m) = (2d_(1)E)/(B^(2)L^(2)) A beam of electron with velocity 3 xx 10^(7) m s^(-1) is deflected 2 mm while passing through 10 cm in an electric field of 1800 V//m perpendicular to its path. e//m for electron is

AAKASH SERIES-ELECTROMAGNETICS-EXERCISE (VERY SHORT ANSWER QUESTIONS )
  1. What is the importance of Oersted's experiment?

    Text Solution

    |

  2. An electric current flows in a wire from east to west- What will be t...

    Text Solution

    |

  3. What is the work done in taking a north pole of strength m around a lo...

    Text Solution

    |

  4. Does a current carrying circular coil produce uniform magnetic field ?

    Text Solution

    |

  5. Two parallel long wires separated by a distance 'd' carry equal curren...

    Text Solution

    |

  6. What is the force on a conductor of length l carrying current 'i' when...

    Text Solution

    |

  7. When a charged particle moves in a uniform magnetic field at right ang...

    Text Solution

    |

  8. If an electron is not deflected in passing through a certain region of...

    Text Solution

    |

  9. What will be the path of a charged particle moving along the direction...

    Text Solution

    |

  10. An electron beam is moving horizontally towards east. If this beam pa...

    Text Solution

    |

  11. What is the direction of the force acting on a charged particle q, mov...

    Text Solution

    |

  12. Does the torque on a current loop in magnetic field change, when its s...

    Text Solution

    |

  13. A current carrying loop free to turn is placed in a uniform magnetic f...

    Text Solution

    |

  14. Is the resistance of an ammeter greater than or less than that of the ...

    Text Solution

    |

  15. Is the resistance of a voltmeter greater than or less that of the galv...

    Text Solution

    |

  16. A moving coil galvanometer can measure a current of 10^(-6)A. What is ...

    Text Solution

    |

  17. What is the smallest value of current that can be measured with a movi...

    Text Solution

    |

  18. How do you convert a moving coil galvanometer into an ammeter?

    Text Solution

    |

  19. The conversion of a moving coil galvanometer into a voltmeter is done ...

    Text Solution

    |