Home
Class 12
PHYSICS
A proton describes a circle of radius 1 ...

A proton describes a circle of radius 1 cm in a magnetic field of strength 0.10 T. What would be the radius of the circle described by an `alpha` particle moving with the same speed in the same magnetic field?

Text Solution

Verified by Experts

` r_(1) = (mu)/(qB), r_(2) = (2mV)/(qB) `
` (r_(1))/ (r_(2)) = 2 :.r_(2)= 2 cm ` .
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC FIELD

    HC VERMA|Exercise Objective 2|9 Videos

  • LIGHT WAVES

    HC VERMA|Exercise Exercises|41 Videos

  • MAGNETIC FIELD DUE TO CURRENT

    HC VERMA|Exercise Exercises|61 Videos

Similar Questions

Explore conceptually related problems

An electorn moves in a circle of radius 10cm with a constant speed of 4.0xx10^(6)ms^(-1) .Find the electric current at a point on the circle.

A particle is moving on a circle of radius r. The displacement at the end of half revolution would be …

Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1 A. What is the magnitude of the magnetic field at the centre of the coil?

Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1 A. What is the magnitude of the magnetic field at the centre of the coil ?

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the (a) total torque on the coil, (b) total force on the coil, (c) average force on each electron in the coil due to the magnetic field? (The coil is made of copper wire of cross-sectional area 10^(-5) m^2 , and the free electron density in copper is given to be about 10^29 m^(-3) .)

A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate (dvecB)/(dt) . Loop 1 of radius R gt r encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in the figure below. Then the emf generated is

Consider a tightly wound 200 turn coil of radius 20 cm, carrying a current of 1A. What is the magnitude of the magnetic field at the centre of the coil ?

A conducting ring of radius r is placed perpendicular inside a time varying magnetic field as shown in figure. The magnetic field changes with time according to B = B_0 + alphat where B_0 and alpha are positive constants. Find the electric field on the circumference of the ring.

HC VERMA-MAGNETIC FIELD-Exercises
  1. A currrent I is passed through a silver strip of width d and area of...

    Text Solution

    |

  2. A particle having a charge of 2.0X10^(-8) C and a mass of 2.0X10^(-10...

    Text Solution

    |

  3. A proton describes a circle of radius 1 cm in a magnetic field of stre...

    Text Solution

    |

  4. An electron having a kinetic energy of 100eV circulates in a path of r...

    Text Solution

    |

  5. Protons having kinetic energy K emerge from an accelerator as a narrow...

    Text Solution

    |

  6. A charged particle is accelerated thrught a potential difference of 12...

    Text Solution

    |

  7. Doubly ionized helium ions are projected with a speed of 10kms^(-1) in...

    Text Solution

    |

  8. A proton is projected with a velocity of 3X10^6 m s ^(-1) perpendicula...

    Text Solution

    |

  9. (a) An electron moves along a circle of radius 1m in a perpendicular m...

    Text Solution

    |

  10. A particle of mass m and positive charge q, moving with a uniform velo...

    Text Solution

    |

  11. A charged particle (q, m) enters perpendicular in a uniform magnetic f...

    Text Solution

    |

  12. A narrow beam of singley charged carbon ions, moving at a constant ve...

    Text Solution

    |

  13. Fe ^+ ions are accelerated through a potential difference of 500 V and...

    Text Solution

    |

  14. A nerrow beam of singly charged potassium ions of kinetic energy 32ke...

    Text Solution

    |

  15. Shows a convex lens of focal length 12 cm lying in a uniform magnetic...

    Text Solution

    |

  16. Electrons emitted with negligible speed from an electron gun are accel...

    Text Solution

    |

  17. Two particles, each having a mass m are placed at a separation d in a ...

    Text Solution

    |

  18. A uniform magnetic field of magnitude 0.20 T exists in space from e...

    Text Solution

    |

  19. A particle moves in a circle of diamater 1.0 cm under the action of ma...

    Text Solution

    |

  20. A proton goes undflected in a crossed electric and magnetic field (th...

    Text Solution

    |