Home
Class 12
PHYSICS
In the figure shown as uniform magnetic ...

In the figure shown as uniform magnetic field `|B|=0.5T` is perpendicular to the plane of circuit. The sliding rod of length `l=0.25 m` moves uniformly with constant speed `v=4ms^-1`. If the resistance of the sllides is `2Omega`, then the current flowing through the sliding rod is

A

`0.1A`

B

`0.17A`

C

`0.08`

D

`0.03A`

Text Solution

Verified by Experts

The correct Answer is:
A
`e=Bvl=0.5xx4xx0.25=0.5V`
`12Omega` and `4Omega` are parallel.Hence, their net resistance `R=3Omega`
`i=e/(R+r)=0.5/(32)=0.1A`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 2 More Than One Correct|10 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 2 Comprehension Based|13 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 1 Subjective|21 Videos

  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Medical entrances gallery|97 Videos

  • ELECTROMAGNETIC WAVES

    DC PANDEY|Exercise Sec C|22 Videos

Similar Questions

Explore conceptually related problems

A wire is bent in the form of a V shape and placed in a horizontal plane.There exists a uniform magnetic field B perpendicular to the plane of the wire. A uniform conducting rod starts sliding over the V shaped wire with a constant speed v as shown in the figure. If the wire no resistance, the current in rod wil

A conducting rod of resistance r moves uniformly with a constant speed v in a uniform magnetic field. If the rod keeps moving uniformly, then the amount of force required is

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 sliding wire of length 0.25 m and having a resistance of 0.5Omega moves along conducting guiding rails AB and CD with a uniform speed of 4m/s. A magnetic field of 0.5 T exists normal to the plane of ABCD directed into the page. The guides are short-circuited with resistances of 4 and 2Omega as shown. The current through the sliding wire is:

Imagine a would where free magnetic charges exist. In this world, a circuit is made with a U shape wire and a rod free to slide on it. A current carried by free magnetic charges can flow in the circuit. When the circuit is placed in a uniform electric field. E perpendicular to the plane of the plane of the circuit and the rod is pulled to the right with a constant speed v, the "magnetic EMF" in the current and the direction of the corresponding current. arising because of changing electric flux will be (l is the length of the rod and c is speed of light).

A metal rod of length l cuts across a uniform magnetic field B with a velocity v. If the resistance of the circuit of which the rod forms a part is r, then the force required to move the rod is

A rectangular loop with a sliding connector of length l=1.0 m is situated in a uniform magnetic field B=2T perpendicular to the plane of loop. Resistance of connector is r=2Omega .Two resistance of 6Omega and 3Omega are connector is r=2Omega . two resistance of 6Omega and 3Omega are connected as shown in figure. the external force required to keep the connector moving with a constant velocity v=2m//s is

In the figure shown a semicircular wire loop is placed in a uniform magnetic field B=1.0T . The plane of the loop is perpendicular to the magnetic field. Current i=2A flows in the loop in the directions shown. Find the magnitude of the magnetic force in both the cases a and b . The radius of the loop is 1.0 m

A rectangular loop with a sliding conductor of length l is located in a uniform magnetic field perpendicular to the plane of the loop . The magneitc inducetion is b . The resistances R_(1) and R_(2) , respectively. Find the current through the conductor during its motion to the right with a constant velocity v .

DC PANDEY-ELECTROMAGNETIC INDUCTION-Level 2 Single Correct
  1. Two circular loops P and Q are concentric and coplanar as shown in fig...

    Text Solution

    |

  2. In the circuit shown in figure, the switch S is closed at t=0. If VL i...

    Text Solution

    |

  3. In the figure shown as uniform magnetic field |B|=0.5T is perpendicula...

    Text Solution

    |

  4. The figure shows a non conducting ring of radius R carrying a charge q...

    Text Solution

    |

  5. A conducnting straight wire PQ of length l is fixed along as diameter ...

    Text Solution

    |

  6. A uniformly wound long solenoid of inductance L and resistance R is cu...

    Text Solution

    |

  7. When a choke coil carrying a steady current is short circuited, the cu...

    Text Solution

    |

  8. In the steady state condition the rate of heat produced in a choke coi...

    Text Solution

    |

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

    Text Solution

    |

  10. The figure shows an L-R circuit the time constant for the circuit is

    Text Solution

    |

  11. In figure, the switch is in the position 1 for long time, then the sw...

    Text Solution

    |

  12. In a decaying L-R circuit, the time after which energy stores in the i...

    Text Solution

    |

  13. Initially the switch is in positions 1 for as long time then shifted t...

    Text Solution

    |

  14. When the switch S is closed at t=0, identify the correct statement jus...

    Text Solution

    |

  15. Two metallic rings of radius R are rolling on a metallic rod. A magnet...

    Text Solution

    |

  16. In the figure, magnetic field points into the pane of paper and the co...

    Text Solution

    |

  17. Find the current passing through battery immediately after key (K) is ...

    Text Solution

    |

  18. In the circuit shown the key (K) is closed at t=0, the current through...

    Text Solution

    |

  19. A loop shown in the figure is immersed in the varying magnetic field B...

    Text Solution

    |

  20. A square loop of side as and a straight long wire are placed in the sa...

    Text Solution

    |