Home
Class 11
PHYSICS
An ammeter and a voltmeter are joined in...

An ammeter and a voltmeter are joined in series to a cell. Their readings are A and V, respectively. If a resistnace is now joined in parallel with the voltmeter

A

both A and V will increase

B

both A and V will decreases

C

A will decreases, V will increases

D

A will increases, V will decreases

Text Solution

Verified by Experts

The correct Answer is:
D


Equivalent resistance so current will increases.
`V_(A)+V_(V)=V`
Due to change `V_(A)` increases so voltmeter reading will decrease.
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEM

    RESONANCE ENGLISH|Exercise Exercise|30 Videos
  • DAILY PRACTICE PROBLEMS

    RESONANCE ENGLISH|Exercise dpp 92 illustration|2 Videos

Similar Questions

Explore conceptually related problems

An ammeter and a voltmeter are joined in series to a cell. Their readings are A and V respectively. If a resistance is now joining parallel with the voltmeter. Then

An ammeter and a voltmeter are joined in sereis to a cell. Their readings are A and V respectively. If a resistance is now joinding parallel with the voltmeter. Then

An ammeter and a voltmeter of resistance R connected in seires to an electric cell of negligible internal resistance. Their readings are A and V respecitvely. If another resistance R is connected in parallel with the voltmeter

An ammeter and a voltmeter of resistance R connected in seires to an electric cell of negligible internal resistance. Their readings are A and V respecitvely. If another resistance R is connected in parallel with the voltmeter

An ammeter and a voltmeter are connected in series to a battery with an emf xi = 6.0 V . When a certain resistance is connected in parallel with the voltmeter, the readings of the latter decreases eta = 2.0 times, whereas the readings of the ammeter increase the same number of times, Find the voltmeter readings after the connection of the resistance.

An ammeter, voltmeter and a resistor are connected in series to a cell and the readings are noted as I and V. If another resistor R is connected in parallel with a voltmeter, then

An ammeter and a voltmeter are connected in series to an ideal battery of emf E. If the ammeter reads I and voltmeter reading V, then

An ammeter and a voltmeter are initially connected in series to a battery of zero internal resistance. When switch S_(1) is closed the reading of the voltmeter becomes half of the initial, whereas the reading of the ammeter becomes double. If now switch S_(2) is also closed, then reading of ammeter becomes :

A voltmeter of resistance R_1 and an ammeter of resistance R_2 are connected in series across a battery oif negligible internal resistance. When as resistance R is connected in parallel to voltmeter reading of ammeter increases three times white that of voltmeter reduces to one third. Find the ratio of R_1 and R_2 .

An ammeter A of finite resistance, and a resistor R are joined in series to an ideal cell C . A potentiometer P is joined in parallel to R . The ammeter reading is I_(0) and the potentiometer reading is V_(0) . P is now replaced by a voltmeter of finite resistance. The ammeter reading now is I and the voltmeter reading is V .

RESONANCE ENGLISH-CURRENT ELECTRICITY-Exercise
  1. A current of 2amp is flowing in the primary circuit of a potentiometer...

    Text Solution

    |

  2. For the same potential difference, a potentiometer wire is replaced by...

    Text Solution

    |

  3. If the current in a potentiometer increases, the position of the null ...

    Text Solution

    |

  4. In a potentiometer wire, whose resistance in 0.5 ohm//m, a current of ...

    Text Solution

    |

  5. The potentiometer wire 10m long and 20 ogm resistance is connected to ...

    Text Solution

    |

  6. The length of a potentiometer wire is 10m and a potential difference o...

    Text Solution

    |

  7. The potential gradient of potentiometer is 0.2 "volt"//m. A current of...

    Text Solution

    |

  8. The emf of a standard cell is 1.5 volt and its balancing length is 7.5...

    Text Solution

    |

  9. The resistance of a galvanometer coil is R. What is the shunt resistan...

    Text Solution

    |

  10. For measurement of potential difference, potentiometer is preferred in...

    Text Solution

    |

  11. Resistivity of potentiometer wire is 10^(-7)Omega-m and its area of cr...

    Text Solution

    |

  12. In electrolysis the mass deposited on an electrode is directly proport...

    Text Solution

    |

  13. An ammeter and a voltmeter are joined in series to a cell. Their readi...

    Text Solution

    |

  14. The resistanca of an ammeter is 13Omega and its scale is graduated for...

    Text Solution

    |

  15. Three resistances P, Q, R each of 2Omega and an unknown resistance S f...

    Text Solution

    |

  16. In the circuit of figure A1 and A2 are ideal ammeters. Then the readin...

    Text Solution

    |

  17. There is a voltmeter in a circuit. In order to triple its range, the r...

    Text Solution

    |

  18. Sensitivity of a potentiometer can be incresed by

    Text Solution

    |

  19. STATEMENT 1: The current density vec J at any point in ohmic resistor ...

    Text Solution

    |

  20. Statement-1 : In a Meter Bridge experiment, null point for an unknown ...

    Text Solution

    |