Home
Class 12
PHYSICS
A steady current i flows in a small squa...

A steady current `i` flows in a small square lopp of wire of side `L` in a horizontal plane. The loop is now folded about its middle such that half of it lies in a vertical plane. Let `vecmu_(1)` and `vecmu_(2)` respectively denote the magnetic moments due to the current loop before and after folding. Then

A

`vec(mu_(2))=0`

B

`vec(mu_(1))` and `vec(mu_(2))` are in the same direction

C

`|vec(mu_(1))|//|vec(mu_(2))|=sqrt(2)`

D

`|vec(mu_(1))|//|vec(mu_(2))|=(1//sqrt(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
`|vec(mu)_(1)|=IA,|vec(mu)_(2)|=I(sqrt(2)A)`
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise Level =I (H.W)|42 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise Level -II (H.W)|37 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise LEVEL-V (SINGLE ANSWER QUESTION)|85 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

A straight wire and a circular loop both carrying currents are in the same vertical plane. There is no contact between the two at the point A. If B_(1) and B_(2) are magnetic fields due to i_(1)andi_(2) respectively at the point C, the centre of the loop, then the total field at C is:

A current carrying circular loop lies on a smooth horizontal plane. Can a uniform magnetic field be set up in such a manner that the loop turns around itself (i.e., turns about the vertical axis).

Two infinite long straight parallel wires A and B are separted by 0.1m distance and carry equal currents in opposite directions. A square loop of wire C of side 0.1m lies in the plane of A and B. The loop of wire C is kept parallel to both A and B at a distance of 0.1m from the nearest wire. Calculate the EMF induced in the loop C while the currents in A and B are increasing at the rate of 10^(3) A//s . Also indicate the direction of current in the loop C.

In Fig ABCDEFA was a square loop of side l, but is folded in two equal parts so that half of it lies in the x-z plane and the other half lies in the y-z plane. The origin O is centre of the frame also. The loop carries current 'i'. The magnetic field at the centre is

(i) Write the expression for the magnetic moment (vecm) due to a planar square loop of side 'l' carrying a steady current I in a vector form. (ii) In figure., this loop is placed in a horizontal plane near a long straight conductor carrying a steady current I_1 at a distance l as shown. Give reasons to explain that the loop will experience a net force but no torque. Write the expression for this force acting on the loop.

Figure shows a square current carrying loop ABCD of side 2m and current i=(1)/(2)A . The magnetic moment vec(M) of the loop is

A square loop of a conducting material of side l and resistance r is dragged through a uniform magnetic field B with uniform velocity v keeping the plane of the loop perpendicular to the direction of the field. What is the current flowing through the loop?

A conducting square loop of side L and resistance R moves in its to one of tis sides. A magnetic induction B , constant in time and space, pointing perpendicular to and into the plane of the loop exists every where. The current induced in the loop is

A square loop ABCD of side 'a' carrying current I is folded about an axis passing through its centre ( y -axis). The two halves are inclined at angle 30^(@) with xy plane as shown. Find the magnetic field at origin. The origin coincides with the centre of loop.

A steady current is flowing in a circular coil of radius R, made up of a thin conducting wire. The magnetic field at the centre of the loop is B_L . Now, a circular loop of radius R//n is made from the same wire without changing its length, by unfounding and refolding the loop, and the same current is passed through it. If new magnetic field at the centre of the coil is B_C , then the ratio B_L//B_C is

NARAYNA-MOVING CHARGES AND MAGNETISM-LEVEL-VI (SINGLE ANSWER QUESTION)
  1. A square loop of side l carrying current I is part of the shown arrang...

    Text Solution

    |

  2. Two positive charges q1 and q2 are moving with velocities v1 and v2 wh...

    Text Solution

    |

  3. A steady current i flows in a small square lopp of wire of side L in a...

    Text Solution

    |

  4. A horizontal straight conductor of mass m and length l is placed in a ...

    Text Solution

    |

  5. A coil having N turns is wound tightly in the form of a spiral with in...

    Text Solution

    |

  6. An observer A and a charge Q are fixed in a stationary frame F(1). An...

    Text Solution

    |

  7. A straight conductor carriers a current alon the z-axis Consider the p...

    Text Solution

    |

  8. A straight conductor carries a current. Assume that all free electrons...

    Text Solution

    |

  9. A conducting gas is in the form of a long length of the cylinder. The ...

    Text Solution

    |

  10. A charged particle is fired at an angle theta to a uniform magnetic fi...

    Text Solution

    |

  11. Two long, thin,parallel conductor are kept very close to each other, w...

    Text Solution

    |

  12. A charged particle enters a region which offers a resistance against i...

    Text Solution

    |

  13. A charged particle is projected in a magnetic field vec(B)=10hat(k)T f...

    Text Solution

    |

  14. A circular conducting loop of radius R and resistance per unit length ...

    Text Solution

    |

  15. A time varying magnetic field is present in a cylindrical region of ra...

    Text Solution

    |

  16. Figure shown plane figure made of a conductor located in a magnetic fi...

    Text Solution

    |

  17. There is region of space where uniform magnetic field of induction B e...

    Text Solution

    |

  18. There is region of space where uniform magnetic field of induction B e...

    Text Solution

    |

  19. There is region of space where uniform magnetic field of induction B e...

    Text Solution

    |

  20. A charged particle of mass m and charge q is projected on a rough hori...

    Text Solution

    |