Home
Class 12
PHYSICS
A plane electromagnetic wave of frequenc...

A plane electromagnetic wave of frequency 20 MHz travels through a space along `x` direction. If the electric field vector at a certain point in space is 6 V `m^(-1)`, what is the magnetic field vector at that point ?

A

2 T

B

`2xx10^(-8)T`

C

`1/2 T`

D

`1/2 xx 10^(-8)` T

Text Solution

Verified by Experts

The correct Answer is:
B
The magnitude of magnetic field is
`B=E/c= (6 V m^(-1))/(3xx10^(8)ms^(-1))=2xx10^(-8)T`
Promotional Banner

Topper's Solved these Questions

  • KARNATAKA CET 2013

    KCET PREVIOUS YEAR PAPERS|Exercise Physics|60 Videos

  • KARNATAKA CET 2015

    KCET PREVIOUS YEAR PAPERS|Exercise PHYSICS|60 Videos

Similar Questions

Explore conceptually related problems

A plane electromagnetic wave of frequency 25 MHz travels in free space along the x-direction. At a particular point in space and time, E = 6.3 hat j V/m. What is B at this point?

Write the relation between the magnitude of electric and magnetic fields in an electromagnetic wave with speed of light and hence find the magnitude of the electric field at a point in space and time if the magnetic field at that place is 2 xx 10^(-8) T .

A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength?

The electric potential at any point x,y,z in meters is given by V=3x^(2) . The electric field at a point (2m,0,1m)is

An electromagnetic wave is travelling in x-direction with electric field vector given by, vecE_y = E_A sin(kx= omega t) J . The correct expression for magnetic field vector is .

KCET PREVIOUS YEAR PAPERS-KARNATAKA CET 2014-PHYSICS
  1. A step down transformer has 50 turns on secondary and 1000 turns on pr...

    Text Solution

    |

  2. The average power dissipated in A.C. circuit is 2 watt. If a current f...

    Text Solution

    |

  3. A plane electromagnetic wave of frequency 20 MHz travels through a spa...

    Text Solution

    |

  4. Two capacitors of 10 PF and 20 PF are connected to 200 V and 100 V sou...

    Text Solution

    |

  5. A physical quantity Q is found to depend on observables x, y and z, ob...

    Text Solution

    |

  6. Which of the following is not a vector quantity ?

    Text Solution

    |

  7. A car moves from A to B with a speed of 30 kmph and from B to A with ...

    Text Solution

    |

  8. A body starts from rest and moves with constant acceleration for t s. ...

    Text Solution

    |

  9. A person is driving a vehicle at uniform speed of 5 m s^(-1) on a le...

    Text Solution

    |

  10. A stone is thrown vertically at a speed of 30 ms^(-1) making an angle ...

    Text Solution

    |

  11. A force vec(F)=5 hat(i)+2hat(j)-5hat(k) acts on a particle whose posit...

    Text Solution

    |

  12. What is a period of revolution of earth satellite ? Ignore the height ...

    Text Solution

    |

  13. A period of geostationary satellite is

    Text Solution

    |

  14. What is the source temperature of the Carnot engine required to get 70...

    Text Solution

    |

  15. A 10 kg metal block is attached to a spring of spring constant 1000 N...

    Text Solution

    |

  16. A metallic wire of 1 m length has a mass of 10xx10^(-3)kg. If a tensio...

    Text Solution

    |

  17. A train is approaching towards a platform with a speed of 10 m s^(-1) ...

    Text Solution

    |

  18. A rotating wheel changes angular speed from 1800 rpm to 3000 rpm in 20...

    Text Solution

    |

  19. A flow of liquid is streamline if the Reynold number is

    Text Solution

    |

  20. A pipe of 30 cm long and open at both the ends produces harmonics. Whi...

    Text Solution

    |