Home
Class 12
PHYSICS
Figure shows three cases: in all case th...

Figure shows three cases: in all case the circular part has radius r and straight ones are infinitely long. For the same current the ratio of field B at centre P in the three case `B_1:B_2:B_3` is

A

`(-(pi)/(2)):((pi)/(2)):((3pi)/(4)-(1)/(2))`

B

`(-(pi)/(2)+1):((pi)/(2)+1):((3pi)/(4)-(1)/(2))`

C

`-(pi)/(2):(pi)/(2):3(pi)/(4)`

D

`(-(pi)/(2)-1):((pi)/(2)-(1)/(4)):((3pi)/(4)+(1)/(2))

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC FIELD AND FORCES

    DC PANDEY ENGLISH|Exercise Assertion and reason|20 Videos

  • MAGNETIC FIELD AND FORCES

    DC PANDEY ENGLISH|Exercise Match the following|4 Videos

  • MAGNETIC FIELD AND FORCES

    DC PANDEY ENGLISH|Exercise Check point|54 Videos

  • INTERFERENCE AND DIFFRACTION OF LIGHT

    DC PANDEY ENGLISH|Exercise Level 2 Subjective|5 Videos

  • MAGNETICS

    DC PANDEY ENGLISH|Exercise MCQ_TYPE|1 Videos

Similar Questions

Explore conceptually related problems

The diagram shows three cases. In all the three cases the circular part has radius r and straight ones are infinitely long. For the same current, I find bar(B) at the centre P.

The figure shows three long straight current carrying conductors. The straight parts are long and the circular part in each case in ((3)/(4))^(th) of a complete circle, Let B_(a), B_(b) and B_(c) represents the strength of field at the centre O in the three cases, then

Figure shows a current loop having two circular arcs joined by two radial lines. Find the magnetic field B at the centre O.

A circular coil 'A' has a radius R and the current flowing through it is I.Another circular coil 'B' has a radius 2R and if 2I is the current flowing through it then the magnetic fields at the centre of the circular coil are in the ratio of

Two wires A & B bend like as shown in figure. 'A' has radius 2 cm and current 1A wire B has radius 4cm & current 3A then ratio of magnetic field

In the figure, the current l enters the circular loop of uniform wire of radius r at A and leaves it at B. The magnetic field of the centre of circular loop is

In the loops shown in fig. all curved section are either semicircles or quarter circles. All the loops carry same current. The magnetic fields at the centre have magnitudes B_1, B_2,B_3 and B_4 . Then,

The figure shows three indentical current carryng square loops A, B and C . Identify the correct statement related to magnetic field B at the centre O of the square loop. Current in each wire is I.

The resistances of three parts of a circular loop are as shown in Fig. The magnetic field at the centre O is (current enters at A and leaves at B and C as shown)

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

DC PANDEY ENGLISH-MAGNETIC FIELD AND FORCES-Taking it together
  1. A large metal sheet carries an electric current along its surface. Cu...

    Text Solution

    |

  2. Let current i=2A be flowing in each part of a wire frame as shown in F...

    Text Solution

    |

  3. A conducting stick of length 2L and mass m is moving down a smooth inc...

    Text Solution

    |

  4. A charge q is moving with a velocity v(1)=1hati m/s at a point in a ma...

    Text Solution

    |

  5. A square frame of side l carries a current produces a field B at its c...

    Text Solution

    |

  6. The magnetic field existing in a region is gicen by vecB =B0(1+(x)/(l)...

    Text Solution

    |

  7. Two straight infinitely long current carrying wires are kept along Z-a...

    Text Solution

    |

  8. In the following figure a wire bent in the form of a regular polygon o...

    Text Solution

    |

  9. A wires PQRS carrying a current I runs along three edges of a cube of ...

    Text Solution

    |

  10. The magnetic field at the centre of square of side a is

    Text Solution

    |

  11. A straight rod of mass m and lenth L is suspended from the identical s...

    Text Solution

    |

  12. A particle of specific chage q//m=piC//kg is projected from the origin...

    Text Solution

    |

  13. A charged particle enters into a uniform magnetic field with velocity ...

    Text Solution

    |

  14. A proton moving with a constant velocity passes through a region of sp...

    Text Solution

    |

  15. Figure shows three cases: in all case the circular part has radius r a...

    Text Solution

    |

  16. A non - popular loop of conducting wire carrying a current I is placed...

    Text Solution

    |

  17. A rectangular loop consists of N closed wrapped turns and has dimendio...

    Text Solution

    |

  18. A particle of charge -q and mass m enters a uniform magnetic field B (...

    Text Solution

    |

  19. A square coil of edge I having n turns carries a curent i. it is kept ...

    Text Solution

    |

  20. A long straight wire along the z- axis carries a current I in the neg...

    Text Solution

    |