Home
Class 12
PHYSICS
Electromagnetic wave are produced by...

Electromagnetic wave are produced by

A

Steady electric field

B

Steady megnetic field

C

Time varying magnetic field

D

Both (2) & (3)

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE|Exercise ASSIGNMENT (SECTION-B) OBJECTIVE TYPE QUESTIONS (ONE OPTION IS CORRECT)|14 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE|Exercise ASSIGNMENT (SECTION-C) (LINKED COMPREHENSION TYPE QUESTIONS)|3 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE|Exercise EXAMPLE|4 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE|Exercise ASSIGNMENT(SECTION -D) Assertion-Reason type Question)|15 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    AAKASH INSTITUTE|Exercise ASSIGNMENT SECTION - D|13 Videos

Similar Questions

Explore conceptually related problems

Electromagnetic waves are produced by

Electromagnetic waves are

Electromagnetic wave is produced by

When charge is at rest then it creates only electric field not the magnetic field. A moving charge generates electric as well as magnetic field around it. If charge is moving with constant velocity then electric and magnetic field do not change with time, hence, it cannot produce electromagnetic wave. When charge is accelerated then time-varying electric and magnetic fields are created and thus electromagnetic wave is produced by accelerated charge. We know that the current-carrying wire creates magnetic field around it. If alternating current is flowing through the wire then it creates variable magnetic field around it and thus starts radiating electromagnetic waves. When a charged capacitor is connected across an inductor then charge starts oscillating between the plates of the capacitor. Normally one plate of the capacitor is connected to Earth and the other plate is connected to an antenna. Antenna radiates electromagnetic wave. Hertz successfully produced electromagnetic waves using such LC oscillator. Speed of electromagnetic wave in vacuum is constant and equal to 3 xx 10^8 m/s. But inside a medium the speed changes according to electrical and magnetic properties of the medium. IF mu_r and epsi_r are the relative permeability and relative premittivity of the medium then speed of light in that medium can be written as

Electromagnetic waves are produed due to

AAKASH INSTITUTE-ELECTROMAGNETIC WAVES-ASSIGNMENT (SECTION-A)(OBJECTIVE TYPE QUESTIONS (ONE OPTIONE IS CORRECT)
  1. If electric field is changing at rate of 6xx10^(6) V/ms between the pl...

    Text Solution

    |

  2. An electromagnetic radiation has an energy of 13.2 keV. Then the radia...

    Text Solution

    |

  3. Electromagnetic wave are produced by

    Text Solution

    |

  4. An electromagneti wave propagationg through vacuum is given B=B(0)sin(...

    Text Solution

    |

  5. If in a region there is a time varying electrinc field then which of t...

    Text Solution

    |

  6. Displacement current exists between the plates of capacitor , wh...

    Text Solution

    |

  7. Which of the following is not electromagnetic wave?

    Text Solution

    |

  8. An electronmagnetic wae propagating along x-axis then oscillating elec...

    Text Solution

    |

  9. Hertz's expriment confirm that

    Text Solution

    |

  10. The dimensional formula of radiation pressure is

    Text Solution

    |

  11. An electromagnetic wave is propagating in vacuum along z-axis, the ele...

    Text Solution

    |

  12. The part of electromagnetic spectrum referred as heat wave is

    Text Solution

    |

  13. Welders wear special glass goggles ro facemask with glass window to pr...

    Text Solution

    |

  14. The momentum carried by E-M waves in vaccum is P, then energy associat...

    Text Solution

    |

  15. The essential distinction between X - rays and gamma - rays is that

    Text Solution

    |

  16. In a plane electromagnetic wave the electric field osciliates sinusoid...

    Text Solution

    |

  17. The dimensional formula mu(0)epsilon0 is

    Text Solution

    |

  18. An electromagnetic wave consists of oscillating electric and magnetic ...

    Text Solution

    |

  19. Which of the following radiation has the least wavelength?

    Text Solution

    |

  20. The speed of em wave in the unit of 10^8m//s, in a medium of dielectri...

    Text Solution

    |