Home
Class 12
PHYSICS
Current is sent from an electric cell of...

Current is sent from an electric cell of emf 30 V and of negligible internal resistance through a resistance of `200 Omega`. When an ammeter is introduced into the circuit is given a reading of 147 mA. Determine the resistance of the ammeter and also the percentage error in the measurements of current.

Text Solution

Verified by Experts

The correct Answer is:
`4.1 Omega 2%`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    CHHAYA PUBLICATION|Exercise EXERCISE ( PROBLEM SET-II)|25 Videos

  • CURRENT ELECTRICITY

    CHHAYA PUBLICATION|Exercise EXERCISE ( HOT NUMERICAL PROBLEMS)|5 Videos

  • CURRENT ELECTRICITY

    CHHAYA PUBLICATION|Exercise EXERCISE ( SHORT ANSWER TYPE QUESTION-II)|7 Videos

  • COMMUNICATION STSTEM

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|28 Videos

  • DIFFRACTION AND POLARISATION OF LIGHT

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|27 Videos

Similar Questions

Explore conceptually related problems

Current is sent through a galvanometer of resistance 50 Omega from a battery of emf 30V and of negligible internal resistance.There is a shunt of resistance 2 Omega connected in parallel with the galvanometer.Find out the resistance that should be connected in series with the battery to get a current of 10mA through the galvanometer.

Electric current is sent through a resistance of 20 Omega from a battery of emf 2V and of negligible internal resistance .During measurements of current with the help of an ammeter , 20% error is incurred.What is the resistance of the ammeter?

An electric cell of emf 2V and of negligible internal resistance is connected in series with a coil of resistance a 20 Omega and a galvanometer of resistance 200 Omega, a 20 Omega resistances is parallel with the galvanometer,find out the galvanometer current.

The internal resistance of a battery of 100 V is 5 Omega . When the emf of the battery is measured by a voltmeter 20% error is found. What is the resistance of the voltmeter?

With a uniform potentimeter wire AB of resistance 100Omega , an electric cell of emf 2 V of negligible internal resistance and voltmeter of 360 Omega is connected in between the point A and a point C on the wire . If the reading in the voltemeter be 0.72 V then in what ratio does the point C divide the wire AB ?

A resistor of magnitude 45 Omega is connected to an electric cell of emf 12V and of 3 Omega internal resistance. An ammeter of resistance 4.5 Omega and a voltmeter of resistance 405 Omega are properly connected with the resistor.What percentage errors is flowing current and potential difference will occur?

What is the minimum number of cells each of emf 10 V and internal resistance 1 Omega to pass a current of 10 A through a resistance R of 3 Omega ? What is the discharging power of R?

Emf of an electric cell is 2.1 V and its internal resistance is 0.1 Omega . When the two poles of the cell are connected with an external resistance, a potential difference of 2.08 V is obtained. Determine the value of the external resistance.

When a voltmeter of resistance 100 Omega is connected with an electric cell, the reading of the voltmeter is 2V. When the cell is connected with a resistance of 15 Omega . An ammeter of resistance 1 Omega given the reading of 0.1 A.Determine the emf of the cell.

CHHAYA PUBLICATION-CURRENT ELECTRICITY -EXERCISE ( PROBLEM SET-I)
  1. With two resistances 2 Omega and 3 Omega In parallel a third resistanc...

    Text Solution

    |

  2. Equivalent resistances of two resistors in their series and parallel c...

    Text Solution

    |

  3. The equivalent resistances of two resistances in parallel combination ...

    Text Solution

    |

  4. There are 14 resistances each of magnitude 1 Omega. Keeping three of t...

    Text Solution

    |

  5. The resistance of an electrical appliance is 200 Omega and it can with...

    Text Solution

    |

  6. The ratio of three resistances is 1:2:3 if the greatest resistance be ...

    Text Solution

    |

  7. Emf of an electric cell is 2.1 V and its internal resistance is 0.1 Om...

    Text Solution

    |

  8. Emf of an electric cell is 1.5 V and its internal resistance Is 2 Omeg...

    Text Solution

    |

  9. A cell of emf 2.1 V and 0.1 Omega internal resistance sends 100 mA cur...

    Text Solution

    |

  10. Electric current is sent through a resistance of 20 Omega from a batte...

    Text Solution

    |

  11. Internal resistance of an electric cell is 1 Omega. Error is incurred ...

    Text Solution

    |

  12. Current is sent from an electric cell of emf 30 V and of negligible in...

    Text Solution

    |

  13. An electric cell of emf 2V and of negligible internal resistance is co...

    Text Solution

    |

  14. Internal resistance of each of 30 identical cells is 3Omega. To get th...

    Text Solution

    |

  15. Emf of each of 15 cells is 2V and internal resistance of each is 0.1 O...

    Text Solution

    |

  16. 5 electric cells are connected in series .Emf of each cell is 1.5 V an...

    Text Solution

    |

  17. When a resistance of 4.5 Omega is connected with 10 identical cells in...

    Text Solution

    |

  18. Calculate the number of electrons crossing a given cross section in 1 ...

    Text Solution

    |

  19. The number of free electrons per unit volume in a metallic conductor i...

    Text Solution

    |

  20. Estimate the average drift speed of conduction electrons in a copper w...

    Text Solution

    |