Home
Class 12
PHYSICS
A constant force is being applied on a r...

A constant force is being applied on a road of length 'l' kept at rest on two parallel conducting rails connected at ends by resistance R in uniform magnitic field B shown.

A

The power delivered by force wil be constant with time

B

The power delivered by force will be increasing first and then will decrease

C

The rate of power delivered by the external force will be increasing continously

D

The rate of power delivered by external force will be decreasing continously.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT

    PHYSICS GALAXY - ASHISH ARORA|Exercise Numerical MCQs|60 Videos

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT

    PHYSICS GALAXY - ASHISH ARORA|Exercise Advance MCQs|33 Videos

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT

    PHYSICS GALAXY - ASHISH ARORA|Exercise Discussion Question-|21 Videos

  • CURRENT ELECTRICITY

    PHYSICS GALAXY - ASHISH ARORA|Exercise All Questions|389 Videos

  • ELECTROSTATICS

    PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numberical Problems|73 Videos

Similar Questions

Explore conceptually related problems

A small conducting rod of length l, moves with a uniform velocity v in a uniform magnetic field B as shown in fig __

A conducting rod of length is moved at constant velocity v_(0) on two parallel, conducting, smooth, fixed rails, that are placed in a uniform constant magnetic field B perpendicular to the plane for the rails as shown in Fig. A resistance R is connected between the two ends of the rails. Then which of the following is/are correct:

A conducting bar mass m and length l moves on two frictionless parallel conducting rails in the presence of a uniform magnetic field B_(0) directed into the paper. The bar is given an initial velocity v_(0) to the right and is released at t = 0 . The velocity of the bar as a function of time is given by

A conducting rod of length l slides at constant velocity v on two parallel conducting rails, placed in a uniform and constant magnetic field B perpendicular to the plane of the rails as shown in Fig.3.49. A resistance R is connected between the two ends of the rails. (a) Idenify the cause which produces change in magnetic flux. (b) Identify the direction of current in the loop. ( c) Determine the emf induced in the loop. (d) Compute the electric power dissipated in the resistor. (e) Calcualte the mechenical power required to pull the rod at a cinstant velovity.

A conducting wire of length l and mass m can slide without friction on two parallel rails and is connected to capacitance C . The whole system lies in amagnetic field B and a constant force F is applied to the rod . Then

A conducting rod MN of mass m and length 'l' is placed on parallel smooth conducting rails connected to an uncharged capacitor of capacitance C and a battery of emf epsilon as shown. A uniform magnetic field B is existing perpendicular to the plane of the rails. The steady state velocity acquired by the conducting rod MN after closing switch S is (neglect the resistance of the parallel rails and the conducting rod)

A horizontal force is applied on a uniform rod of length L kept on a frictionless surface. Find the tension in rod at a distance 'x' from the end where force is applied

A conducting rod of mass m and length l is free to move without friction on two parallel long conducting rails, as shown below. There is a resistance R across the rails. In the entire space around, there is a uniform magnetic field B normal to the plane of the rod and rails. The rod is given an impulsive velocity v_(0) - Finally, the initial energy (1)/(2) mv_(0)^(2)

PHYSICS GALAXY - ASHISH ARORA-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT-Conceptual MCQs
  1. The area of B-H hysteresis curve is an indication of:

    Text Solution

    |

  2. Two identical conducting rings A and B of radius R are rolling over a ...

    Text Solution

    |

  3. A constant force is being applied on a road of length 'l' kept at rest...

    Text Solution

    |

  4. AB and CD are fixed conducting smooth rails placed in a vertical plane...

    Text Solution

    |

  5. An alternating current I in an inductance coil varies with time t acco...

    Text Solution

    |

  6. A small circular loop is suspended from an insulating thread. Another ...

    Text Solution

    |

  7. In the figure shown a T-shaped conductor moves with constant angular v...

    Text Solution

    |

  8. The permanent magnetic moment of the atoms of a material is not zero. ...

    Text Solution

    |

  9. The ring B is coaxial with a solenoid A as shown in figure. As the swi...

    Text Solution

    |

  10. Magnetic permeability is maximum for

    Text Solution

    |

  11. A conducting rod of length l falls verticaly under gravity in a region...

    Text Solution

    |

  12. The figure shows a conducting ring of radius R. A uniform steady magne...

    Text Solution

    |

  13. A metallic rod of length l is hinged at the point M and is rotating ab...

    Text Solution

    |

  14. At Curie point, a ferromagnetic material transforms into:

    Text Solution

    |

  15. A conducting rod is moving with a constant velocity v over the parall...

    Text Solution

    |

  16. A rod is rotating with a constant angular velocity omega about point O...

    Text Solution

    |

  17. A straight conductig rod PQ is executing SHM in xy-plane from x=-d to ...

    Text Solution

    |

  18. A wire is bent in the form of a V shape and placed in a horizontal pl...

    Text Solution

    |

  19. In the circuit shown in the figure initialy the switch in position 1 f...

    Text Solution

    |

  20. When the switch S is closed at t=0, indentify the correct statement ju...

    Text Solution

    |