Home
Class 12
PHYSICS
When a current loop is placed in a unifo...

When a current loop is placed in a uniform magnetic field
`(i)" " vec(F_(R))=0` and `vec(tau)`,`(ii)vec(F_(R))=0` but `vec(tau)cancel(=)0`
`(iii)vec(F_(R))cancel(=)0` but `tau=0`,`(iv)vec(F_(R))cancel(=)0` and `taucancel(=)0`

A

only `I & ii` are true

B

only `ii&iii` are true

C

only `iii & iv` are true

D

only `I & iv` are true

Text Solution

Verified by Experts

The correct Answer is:
2
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise LEVEL-I(C.W)|58 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise Level-II(C.W)|63 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise EXERCISE - 4|20 Videos

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 4 (SINGLE ANSWER TYPE QUESTION)|17 Videos

  • NUCLEAR PHYSICS

    NARAYNA|Exercise LEVEL-II-(H.W)|9 Videos

Similar Questions

Explore conceptually related problems

If vec(a).vec(b)=0 and vec(a) xx vec(b)=0, " prove that " vec(a)= vec(0) or vec(b)=vec(0) .

Force vec(F) acting on a test charge q_(0) in a uniform electric field vec(E) is

Prove that for any two vectors vec(a) and vec(b), vec(a).(vec(a)xx vec(b))=0 . Is vec(b).(vec(a)xx vec(b))=0 ?

If vec(A)+vec(B)+vec(C )=0 then vec(A)xx vec(B) is

A flat coil carrying a current has a magnetic moment vecmu . It is placed in a magnetic field vecB . The torque on the coil is vec(tau)

A closed current-carrying loop having a current I is having area A. Magnetic moment of this loop is defined as vec(mu) = vec(IA) where direction of area vector is towards the observer if current is flowing in anticlockwise direction with respect to the observer. If this loop is placed in a uniform magnetic field vec(B) , then torque acting on the loop is given by vec(tau) = vec(mu) xx vec(B) . Now answer the following questions: A uniformly charged insulating ring is rotated in a uniform magnetic field about its own axis, then

If vec(a). vec(b) = 0 and vec(a) xx vec(b) = vec(0) then which one of the following is correct ?

A conducting circular loop of radiius r carries a constant current i . It is placed in a uniform magnetic field vec(B)_(0) such that vec(B)_(0) is perpendicular to the plane of the loop . The magnetic force acting on the loop is

NARAYNA-MOVING CHARGES AND MAGNETISM-C.U.Q-KEY
  1. A current carrying circular coil, suspended freely in a uniform extern...

    Text Solution

    |

  2. A conducting wire of length l is turned in the form of a circular coil...

    Text Solution

    |

  3. When a current loop is placed in a uniform magnetic field (i)" " vec...

    Text Solution

    |

  4. When a current carrying coil is situated in a uniform magnetic field w...

    Text Solution

    |

  5. In a moving coil galvanometer a radial magnetic field is applied with...

    Text Solution

    |

  6. A current carrying coil tends to set itself

    Text Solution

    |

  7. The restoring couple in the moving coil galvanometer is due to

    Text Solution

    |

  8. A wire of length 'L' is made in the form of a coil in a moving coil ga...

    Text Solution

    |

  9. The relation between voltage sensitivity 'sigma(V)' and current sensi...

    Text Solution

    |

  10. The resistance of an ideal voltmeter is

    Text Solution

    |

  11. The sensitivity of a moving coil galvanometer increases with the decre...

    Text Solution

    |

  12. If a galvanometer is shunted then among the following which statement ...

    Text Solution

    |

  13. The purpose of soft iron cylinder between the pole pieces of the horse...

    Text Solution

    |

  14. The radial magnetic field is used in a suspended coil galvanometer to ...

    Text Solution

    |

  15. Assertion (A): In M.C.G., the deflection 'theta' is directly proportio...

    Text Solution

    |

  16. To measure the resistance of a device using Ohm's law the mode of conn...

    Text Solution

    |

  17. To increase the range of an ammeter, we need to connect a suitable

    Text Solution

    |

  18. An ammeter has a resistance of G ohm and a range of 'I' amere. The val...

    Text Solution

    |

  19. Among the following the false statement is

    Text Solution

    |

  20. A voltmeter has a resistance G and range V. Calculate the resistance t...

    Text Solution

    |