Home
Class 12
PHYSICS
A conducting rod of length l and mass m ...

A conducting rod of length l and mass m is moving down a smooth inclined plane of inclination `theta` with constant i is flowing in the conductor in a direction perpendicular to paper inwards. A vertically upward magnetic field `vec B` exists in space. Then, magnitude of magnetic field `vec B` is

A

`(mg sin theta)/(Il)`

B

`(mg tan theta)/(Il)`

C

`(mg cos theta)/(Il)`

D

`(mg sin theta)/(I)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    PHYSICS WALLAH|Exercise NEET PAST 5 YEARS QUESTIONS |12 Videos

  • MOVING CHARGES AND MAGNETISM

    PHYSICS WALLAH|Exercise NEET PAST 5 YEARS QUESTIONS |12 Videos

  • MOTION IN A STRAIGHT LINE

    PHYSICS WALLAH|Exercise NEET Past 5 Years Questions|5 Videos

  • OSCILLATIONS

    PHYSICS WALLAH|Exercise NEET PAST 5 YEARS QUESTIONS |5 Videos

Similar Questions

Explore conceptually related problems

A conducting stick of length 2L and mass m is moving down a smooth inclined plane of inclination 60^(@) with constant speed 5m/s. A current 2A is flowing in the conductor perpendicular to the paper inwards. A vertically upward magnetic field B exists in space there. The magnitude of magnetic field B is

A conducting rod PQ of length l = 2m is moving at a speed of 2m s^(-1) making an angle of 30^(@) with its length. A uniform magnetic field B = 2T exists in a direction perpendicular to the plane of motin. Then

A conducting rod of length l is moving in a transverse magnetic field of strength B with veocity v. The resistance of the rod is R. The current in the rod is

A conducting wire of length l and mass m is placed on two inclined rails as shown in figure. A current I is flowig in the wire in the direction shown When no magnetic field is present in the region, the wire is just on the verge of sliding. When a vertically upward magnetic field is switched on, the wire starts moving up the incline. The distance travelled by the wire as a function of time t will be

A rectangular loop of dimensions (axxb) carries a current i. A uniform magnetic field vec(B)=B_(0) hat(i) exists in space. Then :

A straight horizontal conductor PQ of length l, and mass_ m slides down on two smooth conducting fixed parallel rails, set inclined at an angle 9 to the horizontal as shown in figure-5.30. The top end of the bar are connected with a capacitor of capacitance C. The system is placed in a uniform magnetic field, in the direction perpendicular to the inclined plane formed by the rails as shown in figure. If the resistance of the bars and the sliding conductor are negligible calculate the acceleration of sliding conductor as a function of time ifit is released from rest at t= 0

A conducitng rod AB of length l = 1 m moving at a velcity v = 4 m//s making an angle 30^(@) with its length. A uniform magnetic field B = 2T exists in a direction perpendicular to the plane of motion. Then :

The two ends of a horizontal conducting rod of length l are joined to a voltmeter. The whole arrangement moves with a horizontal velocity v , the direction of motion being perpendicular to the rod. The vertical component of the earth's magnetic field is B . The voltmeter reading is

A conducting wire xy of lentgh l and mass m is sliding without friction on vertical conduction rails ab and cd as shown in figure. A uniform magnetic field B exists perpendicular to the plane of the rails, x moves with a constant velocity of

PHYSICS WALLAH-MOVING CHARGES AND MAGNETISM -LEVEL - 2
  1. The maximum velocity to which a proton can be accelerated in a cycl...

    Text Solution

    |

  2. A cyclotron can accelerate

    Text Solution

    |

  3. Two thin long parallel wires separated by a distance b are carrying a ...

    Text Solution

    |

  4. In the given figure, the loop is fixed but straight wire can move. The...

    Text Solution

    |

  5. The deflection in a moving coil galvanometer is

    Text Solution

    |

  6. A galvanometer has 30 divisions and a sensitivity 16 mu A //"div". It ...

    Text Solution

    |

  7. If resistance of voltmeter is 10000 Omega and resistance of ammeter is...

    Text Solution

    |

  8. A voltmeter of range 2 V and resistance 300 Omega cannot be converted ...

    Text Solution

    |

  9. A long solenoid carrying a current produces a magnetic field B alon...

    Text Solution

    |

  10. An electric current passes through a long straight copper wire. At a d...

    Text Solution

    |

  11. A square wire of each side l carries a current I. What is the magnetic...

    Text Solution

    |

  12. A conductor carrying current I is of the type as shown in figure. Find...

    Text Solution

    |

  13. A and B are two infinitely long straight parallel conductors. C is ano...

    Text Solution

    |

  14. A conducting rod of length l and mass m is moving down a smooth inclin...

    Text Solution

    |

  15. The magnetic force per unit length on a wire carrying a current of 10 ...

    Text Solution

    |

  16. Current i is carried in a wire of length L. If the wire is turned into...

    Text Solution

    |

  17. An alpha-particle is accelerated by a potential difference of 10^4 V. ...

    Text Solution

    |

  18. In the loop shown, the magnetic induction at the point 'o' is

    Text Solution

    |

  19. If an electron is revolving in a circular orbit of radius 0.5A^(@) wit...

    Text Solution

    |

  20. Two conductors having current in opposite direction………………..

    Text Solution

    |