Home
Class 12
PHYSICS
A circular coil of radius 20 cm and 20 t...

A circular coil of radius `20 cm` and `20` turns of wire is mounted vertically with its plane in magnetic meridian.A small magnetic needle (free to rotate about vertical axis) is placed at the center of the coil.It is deflected through `45^(@)` when a current is passed through the coil and in equilbrium (Horizontal component of earth's field is `0.34 xx 10^(-4) T`).The current in coil is:

A

`17/(10 pi) A`

B

`6 A`

C

`6 xx 10^(-3)A`

D

`3/(50) A`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • NEET MOCK TEST 3

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

  • NEET MOCK TEST 5

    NTA MOCK TESTS|Exercise PHYSICS - SINGLE CHOICE|45 Videos

Similar Questions

Explore conceptually related problems

A 2 turn coil of radius 10cm is placed with its plane in magnetic meridian. A small magnetic needle is suspended at the centre of the coil by a torsion free silk thread. On passing a current through the coil, the needle is deflected through 45^@ . Calculate the strength of the current if horizontal component of earth's field is 1*6xx10^-5T

A circular coil of radius 40 mm consists of 250 turns of wire in which the current is 20 mA. The magnetic field at the centre of the coil is

A circular coil of radius 4 cm and of 20 turns carries a current of 3 amperes. It is placed in a magnetic field of intensity of 0.5 weber//m^(2) . The magnetic dipole moment of the coil is

A circular coil of radius 10 cm, 500 turns and resistance 2 Omega is placed with its plane prependicular to the horizontal component of the earth's magnetic field. It is rotated about its vertical diameter through 180^(@) in 0.25 s. Estimate the magnitude of the e.m.f and current induced in the coil. Horizotal component of earth's magnetic field at the place is 3 xx 10^(-5) T .

A circular loop of mean radius 5 cm, which has 40 turns of insulated copper wire, is placed in the magnetic meridian. A compass needle is placed at the center of the loop. What direction is produced by a current of 0.1 A through the coil? (H-vector of the earth's field at the place = 29 A m^(-1)

A circular coil of radius 10 cm having 100 turns carries a current of 3.2 A. The magnetic field at the center of the coil is

A circular of radius 0.157 m has turns. It is placed such that its axis is in magnetic meridian. A dip needle is supported at the centre of the coil with its axis of rotation horizontal, and in the plane of the coil. The angle of dip is 30^(@) when a current flows through the coil. The angle of dip becomes 60^(@) on reversing the current. Find the current in the coil assuming that the magnetic field due to the coil is smaller than the horizontal component of earth's magnetic field, H =3xx10^(-5) T .

A tangent galvanometer shown a deflection of 45^@ when 10 mA of current is passed through it. If the horizontal component of the earth's magnetic field is B_H = 3.6 xx 10^(-5) T and radius of the coil is 10cm , find the number of turns in the coil.

A coil of radius 10 cm and resistance 40 Omega has 1000 turns. It is placed with its plane vertical and its axis parallel to the magnetic meridian. The coil is connected to a galvanometer and is rotated about the vertical diameter through an angle of 180^@ . Find the charge which flows through the galvanometer if the horizontal component of the earth's magnetic field is B_H = 3.0X 10^(-5) T .

NTA MOCK TESTS-NEET MOCK TEST 4-PHYSICS
  1. there are two force each having same magnitude 10 N .one is incilined ...

    Text Solution

    |

  2. Argon gas is adiabatically compressed to half its volume. If P, V and ...

    Text Solution

    |

  3. A circular coil of radius 20 cm and 20 turns of wire is mounted vertic...

    Text Solution

    |

  4. One litre of oxygen at a pressure of 1 atm and two litres of nitrogen ...

    Text Solution

    |

  5. Why the coil of a dead beat galvanometer is wound on a metal frame?

    Text Solution

    |

  6. According to Newton's law of cooling, the rate of cooling of a body is...

    Text Solution

    |

  7. In the Young's double slit experiment, the intensities at two points P...

    Text Solution

    |

  8. A body slides down on a frictionless track which ends in a circular lo...

    Text Solution

    |

  9. Let N(beta) be the number of beta particles emitted by 1 gram of Na^(2...

    Text Solution

    |

  10. The binding energy of deuteron is 2.2 MeV and that of .(2)^(4)He is 28...

    Text Solution

    |

  11. A long copper tube of inner radius R carriers a current i. The magneti...

    Text Solution

    |

  12. Water rises up to a height h in a capillary tube of certain diameter. ...

    Text Solution

    |

  13. The tolerance level of a resistor with the colour code red, blue, oran...

    Text Solution

    |

  14. An athlletic coach told his team that muscle times speed equals power....

    Text Solution

    |

  15. Two masses of 1 kg and 5 kg are attached to the ends of a massless str...

    Text Solution

    |

  16. Assuming that potential energy of spring is zero when it is stretched ...

    Text Solution

    |

  17. The engine of a car produces acceleration 4m//s^(2) in the car. If thi...

    Text Solution

    |

  18. A body of mass m=10^(-2) kg is moving in a medium and experiences a f...

    Text Solution

    |

  19. An electron is accelerated under a potential difference of 64 V, the d...

    Text Solution

    |

  20. To get an output 1 from the circuit shown in the figure, the input mus...

    Text Solution

    |