Home
Class 12
PHYSICS
In the previous question, if A and C are...

In the previous question, if `A` and `C` are used as terminals, with `B` isolated, full-scale isolated, full-scale deflection is obtained for a current of.

A

90 mA

B

100 mA

C

900 mA

D

`1 A`

Text Solution

Verified by Experts

The correct Answer is:
B

`(I - 10 xx 10^-3) xx (0.1 + 0.9) = 9 xx 10 xx 10^-3`
`I = 100 xx 10^-3 A`
=`100 mA`.
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    CP SINGH|Exercise Exercise|137 Videos

  • CAPACITANCE

    CP SINGH|Exercise Exercise|74 Videos

  • ELECTROMAGNETIC INDUCTION

    CP SINGH|Exercise EXERCISES|141 Videos

Similar Questions

Explore conceptually related problems

A galvanometer with a coil of resistance 50 Omega shows full-scale deflection when 10 mA current passes through it.

A galvanometer having a coil resistance of 100 omega gives a full scale deflection , when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of 10A , is :

(a) Briefly explain how a galvanometer is converted into an ammeter. (b) A galvanometer coil has a resistance of 15 Omega and it shows full scale deflection for a current of 4 mA. Convert it into an ammeter of range 0 to 6 A.

A milliammeter of range 10 mA and resistance 9 Omega is joined in a circuit as shown. The metre gives full-scale deflection for curretn I when A and B are used as its terminals, i.e., current enters at A and leaves at B ( C is left isolated). The value if I is

A galvanometer having a coil resistance 100 Omega given full scale deflection when a current of 1mA is passed throught it . What is the value of the resistance which can convert this galvanometer into a voltmeter giving full scale deflection for a potential difference of 10 V ?

A galvanometer with a coil resistance of 100Omega shows a full-scale deflection when a current of 1 mA is passed through it. What is value of the resistance which can convert this galvanometer into an ammeter showing a full scale deflection for a current 10 A? A resistance of the required value is available but it will get burnt if the energy dissipated in it is greater then 1 W. Can it be used for the conversion of the galvanometer described above?

A galvanometer of resistance 30 2 is connected to a battery of emf 2 V with 1970 Q resistance in series. A full scale deflection of 20 divisions is obtained in the galvanometer. To reduce the deflection to 10 divisions, the resistance in series required is

A milli- ammeter of range 10 mA and resistance 9 Omega are joined in a circuit as shown in the fig. The meter gives full scale deflection, when current in the main circuit is I, and A and D are used as terminals. The value of I is

CP SINGH-CURRENT ELECTRICITY-Exercise
  1. A microammeter has as resistance of 100 Omega and full scale range of ...

    Text Solution

    |

  2. A milliammeter of range 10 mA and resistance 9 Omega is joined in a ci...

    Text Solution

    |

  3. In the previous question, if A and C are used as terminals, with B iso...

    Text Solution

    |

  4. A galvanometer of resistance G is shunted by a resistance S ohm. To...

    Text Solution

    |

  5. A voltmeter having a resistance of 998 ohms is connected to a cell of ...

    Text Solution

    |

  6. A voltmeter and an ammeter are connected in series to an ideal cell of...

    Text Solution

    |

  7. A, B and C are voltmeters of resistances R, 1.5R and 3R respectively. ...

    Text Solution

    |

  8. An ammeter and a voltmeter are joined in sereis to a cell. Their readi...

    Text Solution

    |

  9. Three voltmeters all having different resistance, are joined as shown....

    Text Solution

    |

  10. Three ammeters A,B, and C of resistances RA,Rb and RC respectively are...

    Text Solution

    |

  11. A voltmeter of resistance 200 Omega is used to measure p.d across resi...

    Text Solution

    |

  12. An ammeter and a voltmeter are connected in series to a battery of emf...

    Text Solution

    |

  13. The voltmeter reads 40 V across 60 Omega resistance. The resistance of...

    Text Solution

    |

  14. A p.d of 220 V is maintained across a 12000 Omega rheostat as shown. T...

    Text Solution

    |

  15. An elctrical circuit is shown in Fig. Calculate the potential differen...

    Text Solution

    |

  16. Two resistors of 500 Omega and 300 Omega are connected in series with ...

    Text Solution

    |

  17. In the circuit shown the cells A and B have negligible resistance. For...

    Text Solution

    |

  18. In the adjoining circuit, the e.m.f. of the cell is 2 volt and the int...

    Text Solution

    |

  19. In the circuit P != R, the reading of the galvanometer is same with s...

    Text Solution

    |

  20. The reading of the ammeter as per figure shown is

    Text Solution

    |