Home
Class 12
PHYSICS
There is a uniform magnetic field direct...

There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then

A

current is induced in the loop in the anticlockwise direction

B

current is induced in the loop in the clockwise direction

C

Altrenating current is induced in the loop

D

no current is induced in the loop

Text Solution

Verified by Experts

The correct Answer is:
A
The area of loop is increasing
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    CP SINGH|Exercise EXERCISES|141 Videos

  • CURRENT ELECTRICITY

    CP SINGH|Exercise Exercise|137 Videos

  • ELECTROMAGNETIC WAVES

    CP SINGH|Exercise EXERCISES|21 Videos

Similar Questions

Explore conceptually related problems

Space is divided by the line AD into two regions. Region I is field free and the Region II has a unifrom magnetic field B direction into the plane of the paper. ACD is a simicircular conducting loop of radius r with center at O, hte plane of the loop being in the plane of the paper. The loop is now made to rotate with a constant angular velocity omega about an axis passing through O and the perpendicular to the plane of the paper. The effective resistance of the loop is R. (i) obtain an expression for hte magnitude of the induced cureent in the loop. (ii) Show the direction of the current when the loop is entering into the Rigion II. Plot a graph between the induced e.m.f and the time of roation for two periods or rotation.

The counductor AD moves to the right in a uniform magnetic field directed into the plane of the paper.

A space is divided by the line AD into two regions. Region I is field free and the region II has a uniform magnetic field B directed into the paper. ACD is a semicircular conducting loop of radius r with centre at O, the plane of the loop being in the plane of the paper. The loop is now made to rotate with a constant angular velocity  about an axis passing through O, and perpendicular to the plane of the paper in the clockwise direction. The effective resistance of the loop is R. Show the direction of the current when the loop is entering into the region II.

A space is divided by the line AD into two regions. Region I is field free and the region II has a uniform magnetic field B directed into the paper. ACD is a semicircular conducting loop of radius r with centre at O, the plane of the loop being in the plane of the paper. The loop is now made to rotate with a constant angular velocity  about an axis passing through O, and perpendicular to the plane of the paper in the clockwise direction. The effective resistance of the loop is R. Obtain an expression for the magnitude of the induced current in the loop.

A space is divided by the line AD into two regions. Region I is field free and the region II has a uniform magnetic field B directed into the paper. ACD is a semicircular conducting loop of radius r with centre at O, the plane of the loop being in the plane of the paper. The loop is now made to rotate with a constant angular velocity  about an axis passing through O, and perpendicular to the plane of the paper in the clockwise direction. The effective resistance of the loop is R. Plot a graph between the induced emf and the time of rotation for two periods of rotation.

PQRS is a square region of side 2a in the plane of paper. A uniform magnetic field B, directed perpendicular to the plane of paper and into its plane is confined within this square region. A square loop of side 'a' and made of a conducting wire of resistance R is moved at a constant velocity vec(v) from left to right in the plane of paper as shown. Obviously, the square loop will enter the magnetic field at some time and then leave it after some time. During the motion of loop, whenever magnetic flux through it changes, emf will be induced resulting in induced current. Let the motion of the square loop be along x-axis and let us measure x coordinate of the centre of square loop from the centre of the square magnetic field region (taken as origin). Thus, x coordinate will be positive if the centre of square loop is to the right of the origin O (centre of magnetic field) and negative if centre is to the left. For x = a//4 (i) magnetic flux through the loop, (ii) induced current in the loop and (iii) external force required to maintain constant velocity of the loop, will be

An alpha -particle and a proton are moving in the plane of the paper in a region where there is a uniform magnetic field vecB directed normal to the plane of the paper. If the two particles have equal linear momenta, what will be the ratio of their trajectories in the field?

A conducting loop of radius R is present in a uniform magnetic field B perpendicular to the plane of the ring. If radius R varies as a function of time t, as R =R_(0) +t . The emf induced in the loop is

A circular loop of radius R is kept in a uniform magnetic field pointing perpendicular into the plane of paper. When a current l flows in the loop, the tension produced in the loop is

CP SINGH-ELECTROMAGNETIC INDUCTION-EXERCISES
  1. Faraday's law are consequence of conservation

    Text Solution

    |

  2. A coil having n turns and resistance R Omega is connected with a galva...

    Text Solution

    |

  3. There is a uniform magnetic field directed perpendicular and into the ...

    Text Solution

    |

  4. A rectangular coil ABCD is rotated anticlockwise with a uniform angula...

    Text Solution

    |

  5. shows a circular wheel of radius 10.0 cm whose upper half, shown dark...

    Text Solution

    |

  6. An induced emf is produced when a magnet is plunged into a coil. The m...

    Text Solution

    |

  7. In the figure the flux through the loop perpendicular to the plane of ...

    Text Solution

    |

  8. A metallic meter stick moves with a velocity of 2m//sec in a diretion ...

    Text Solution

    |

  9. An electric potential difference will be induced between the ends of t...

    Text Solution

    |

  10. A conducing rod of length l is falling with a velocity v perpendicular...

    Text Solution

    |

  11. A square metal wire loop of side 10 cm and resistance 1 ohm is moved w...

    Text Solution

    |

  12. Figure shows a wire sliding on two parallel, conducting rails placed a...

    Text Solution

    |

  13. A uniform rod of mas m is moving with constant velocity v(0) in a perp...

    Text Solution

    |

  14. A conductor PQ , with PQ=r , moves with a velocity v in a uniform magn...

    Text Solution

    |

  15. The wings of an aeroplane are I0m apart. The plane is moving horizonta...

    Text Solution

    |

  16. The two rails of a railway track, insulated from each other and the gr...

    Text Solution

    |

  17. The magnitude of the earth's magnetic field at a place is B(0) and an...

    Text Solution

    |

  18. In the precious question, if the conductor lies east-west and the move...

    Text Solution

    |

  19. The two ends of a horizontal conducting rod of length l are joined to ...

    Text Solution

    |

  20. A player with 3 meter long iron rod runs toward east with a speed of ...

    Text Solution

    |