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

Thepower delivered by force will remain constant with time

B

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

C

The power delivered by force will be increasing constinously

D

The power delivered by force will be decreasing continously

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    DC PANDEY|Exercise Level 2 Subjective|10 Videos

  • ATOMS

    DC PANDEY|Exercise MEDICAL ENTRANCES GALLERY|42 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)

DC PANDEY-ALTERNATING CURRENT-JEE MAIN
  1. In the given arrangement, the loop is moved with consisant velocity in...

    Text Solution

    |

  2. A uniform magnetic field existsin region given by vec(B) = 3 hat(i) + ...

    Text Solution

    |

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

    Text Solution

    |

  4. Figures shows a square loop of side 1m and resistance 1Omega. The magn...

    Text Solution

    |

  5. A wire of fixed length is wound on a solenoid of length l and radius r...

    Text Solution

    |

  6. In the given circuit, let i(1) be the current drawn battery at time t=...

    Text Solution

    |

  7. In a series L-R growth circuit, if maximum current and maximum voltage...

    Text Solution

    |

  8. A resistance is connected to a capacitor in AC are the phase differece...

    Text Solution

    |

  9. A reacangular loop if size (2m xx 1m) is placed in x-y plane. A unifor...

    Text Solution

    |

  10. State wheather the following two statement are true or false

    Text Solution

    |

  11. Radius of a circular ring is changing with time and the coil is placed...

    Text Solution

    |

  12. r.m.s. value of current i=3+4sin (omegat+pi//3) is

    Text Solution

    |

  13. An AC voltage of V=220sqrt2 sin (100pit+(pi)/(2))V is applied across a...

    Text Solution

    |

  14. A direct current of 2 A and an alternating current having a maximum va...

    Text Solution

    |

  15. By what percentage the impedance in an AC series circuit should be inc...

    Text Solution

    |

  16. A power transformer (step up) with an 1:8 turns ratio has 60 Hz,120 V ...

    Text Solution

    |

  17. A choke coil has.

    Text Solution

    |

  18. Comparing the L-C oscillations with the oscillations of a spring-block...

    Text Solution

    |

  19. A capacitor of capacity 2muF is changed to a potential different of 12...

    Text Solution

    |

  20. The power factor of the circuit in fig. is 1//sqrt(2). The capacitance...

    Text Solution

    |