Home
Class 12
PHYSICS
A : High frequency electromagnetic waves...

A : High frequency electromagnetic waves are detected by some means based on physical effects they produce on interacting with matter.
R : The oscillating fields of an electromagnetic wave can accelerate charges and can produce oscillating currents therefore, an apparatus designed to detect EM waves is based on this fact.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

If assertion is true statement but Reason is false, then mark (3)

D

If both Assertion and Reason are false statements, then mark (4)

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - C Previous Years Questions|22 Videos

  • ELECTROMAGNETIC INDUCTION

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

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - D|9 Videos

Similar Questions

Explore conceptually related problems

An electromagnetic wave can be produced, when charge is

(A) : Dipole oscillations produce electro­magnetic waves. (R) : Accelerated charge produces electro­magnetic waves.

A : Different electromagnetic waves differ considerably in their mode of interaction with matter. R : Different electromagnetic waves have different wavelength or frequency.

How is electromagnetic wave produced ? Draw a sketch of a plane e.m. wave propagating along X-axis depicting the directions of the oscillating electric and magnetic fields.

(A ): In electromagnetic wave, electric and magnetic fields oscillate in the same plane and in the same phase. (R) Electric field is the primary energy carrier in the electromagnetic wave.

Assertion : Electromagnetic waves interact with matter and set up oscillations Reason : Interaction is independent of the wavelength of the electromagnetic wave.

Which of the following physical quantities contained in a small volume oscillates at double the frequency of passing electromagnetic wave?

(A) : In an electromagnetic wave, the electric and magnetic fields oscillate in phase (R) : In an electromagnetic wave, the electric and magnetic fields oscillate out of phase.

How does a charge q oscillating at certain frequency produce electromagnetic waves ? Sketch a schematic diagram depicting electric and magnetic fields for an electromagnetic wave propagating along the Z-direction.

A : All electromagnetic waves travel through vacuum with same speed but they have different wavelength or frequency. R : The wavelength of the electromagnetic waves is often correlated with and characteristic size of the system that produces and radiates them.

AAKASH INSTITUTE ENGLISH-ELECTROMAGNETIC WAVES-ASSIGNMENT SECTION - D Assertion-Reason Type Questions
  1. A : Different electromagnetic waves differ considerably in their mode ...

    Text Solution

    |

  2. A : All electromagnetic waves travel through vacuum with same speed bu...

    Text Solution

    |

  3. A : High frequency electromagnetic waves are detected by some means ba...

    Text Solution

    |

  4. A : infrared waves are often called heat waves. R : Infrared waves v...

    Text Solution

    |

  5. A : The centre of sensitivity of our eyes coincides with the centre of...

    Text Solution

    |

  6. A : Long distance radio broadcasts use short-wave bands. R : Ionosp...

    Text Solution

    |

  7. A : It is necessary to use satellites for long distance TV transmissi...

    Text Solution

    |

  8. A : Optical and radio telescopes are built on the ground but X-ray ...

    Text Solution

    |

  9. A : If the earth did not have an atmosphere, its average surface temp...

    Text Solution

    |

  10. A : It has been predicted that a global nuclear war on the earth would...

    Text Solution

    |

  11. A : In an EM wave the magnitude of the electric field vector is more ...

    Text Solution

    |

  12. A : The displacement current goes through the gap between the plates...

    Text Solution

    |

  13. As the frequency of an ac circuit increases, the current first increas...

    Text Solution

    |

  14. A : When cooking in microwave ovens, metal containers are used. R :...

    Text Solution

    |

  15. A : Food is cooked faster by microwaves than by conventional gas burne...

    Text Solution

    |

  16. A : Microwaves are commonly used in radar to locate flying objects. ...

    Text Solution

    |

  17. A : Environmental damage has depleted the ozone layer in the atmosphe...

    Text Solution

    |

  18. A: The electrical. Conductivity of the Earth's atmosphere does not cha...

    Text Solution

    |

  19. A : Static crashes are heard on a radio when a lightening flash occurs...

    Text Solution

    |

  20. A : TV signals are affected if a low flying aircraft passes by or a p...

    Text Solution

    |