Home
Class 12
PHYSICS
A voltmeter of 250 mV range having a res...

A voltmeter of 250 mV range having a resistance of 10 `Omega` is converted into an ammeter of 250 mA range . The value of necessary shunt is (nearly )

A

`2Omega`

B

`0.1Omega`

C

`1Omega`

D

` 10 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
`E_1 = 18V, r_1=3Omega, E_2=10V, r_2= Omega` (given)
Current , `(i)=(E_1-E_2)/(r_1)+(r_2)`
` i= (18)-(10) / (3+1)`
(i) `=2A`
Voltage ,`V=E-ir=18-(2xx3)= 12V`
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEM

    SIA PUBLICATION|Exercise PROBLEMS|6 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    SIA PUBLICATION|Exercise MCQS|44 Videos

Similar Questions

Explore conceptually related problems

A volmeter of 250 mV range having resistance of 10 omega is converted into an ammeter of 250 mA range. The value of necessary shunt is (nearly)

To convert a 800mV range millivoltmeter of resistance 40Omega , itno a miliammeter of 100 mA range , the resistance to be connected as shunt is

A galvanometer has a current range of 15mA and voltage range of 750mv. To convert this galvanometer into an ammeter of range 25A, the sunt resistance required is nearly

In a potentiometer, a wire of length 10m having resistance 50 Omega is used. A battery of 5V and a resistor of 450Omega are connected in series to the wire. If an unknown battery of emf E balances the potentiometer at 450cm, then the value of E is

A galvanometer of resistance 40Omega and current passing through it is 100muA per divison. The full scale has 50 divisions. If it is converted into an ammeter of range 2A by using a shunt, then the resistance of ammeter is

SIA PUBLICATION-CURRENT ELECTRICITY AND ALTERENATING CURRENT -MCQ
  1. A battery of the emf 18 V and internal resistance of 3 Omega and anoth...

    Text Solution

    |

  2. A voltmeter of 250 mV range having a resistance of 10 Omega is convert...

    Text Solution

    |

  3. In a half wave rectifier, the AC input source of frequency 50 Hz is us...

    Text Solution

    |

  4. In a circuit L, C and R are connected in series with an alternating vo...

    Text Solution

    |

  5. A constant potential difference is applied between the ends of the wir...

    Text Solution

    |

  6. In a metre bridge , the gaps are enclosed by resistances of 2omega and...

    Text Solution

    |

  7. In a Ac circuit aV and I are given below , then find the power dissiap...

    Text Solution

    |

  8. Wires A and B have resistivities pA and pB. If the diameter of the wir...

    Text Solution

    |

  9. In the circuit shown , the heat produced in 5Omega resistance due to c...

    Text Solution

    |

  10. A capacitor 50muF is connected to a power source V= 220 sin 50 t (V i...

    Text Solution

    |

  11. In the circuit shown in the figure , the current 'T' is

    Text Solution

    |

  12. In the meter bridge experiment , the length AB of the wire is 1m. The ...

    Text Solution

    |

  13. A series LCR circuit is cnnected across a source of alternating emf of...

    Text Solution

    |

  14. The sensitivity of a galvanometer that measure current is decreased by...

    Text Solution

    |

  15. Three resistences of equal values are arranged in four different confi...

    Text Solution

    |

  16. Four resistors A, and D form a Wheatstone bridge. The bridge is bala...

    Text Solution

    |

  17. The electric current I in the circuit shown is

    Text Solution

    |

  18. In the circuit shown below, the ammeter reading is zero Then the value...

    Text Solution

    |

  19. A constant voltage of 25 V is applied to a series L-R circuit at t =...

    Text Solution

    |

  20. The sensitivity of a galvanometer is 60 division /A . When a shunt i...

    Text Solution

    |