Home
Class 12
PHYSICS
Why a dc voltmeter and dc ammeter cannot...

Why a dc voltmeter and dc ammeter cannot read ac?

Text Solution

Verified by Experts

The correct Answer is:
average is zero in a cycle
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    CHHAYA PUBLICATION|Exercise EXERCISE ( Short Answer Type-I)|18 Videos

  • ALTERNATING CURRENT

    CHHAYA PUBLICATION|Exercise EXERCISE ( Short Answer Type-II)|3 Videos

  • ALTERNATING CURRENT

    CHHAYA PUBLICATION|Exercise EXERCISE (Multiple Choice Question)|32 Videos

  • CHHAYA PUBLICATION|Exercise EXAMPLE|1 Videos

  • ATOM

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|18 Videos

Similar Questions

Explore conceptually related problems

What type of voltmeters or ammeters are used for measuring alternating voltage or current?

Out of ammeter, voltmeter and galvanometer, which one has the lowest resistance and why?

Statement I: Out of galvanometer ,ammeter and voltmeter , resistance of ammeter is lowest and resistance of voltmeter is highest. Statement II: AN ammeter is connected in series and a voltmeter is connected in parallel, in a circuit.

Of ammeter and voltmeter whose resistance is greater and why?

A battery of emf 1.4V and interna! resistance 2Omega is connected to a resistor of 100Omega resistance through an ammeter. The resistance of ammeter is 4/3Omega a voltmeter has also been connected to find the potential difference across the resistor. The ammeter reads 0.02 A. What is the resistance of voltmeter.

By mistake, a voltmeter is connected in series and an ammeter in parallel with a resistance in an electric circuit. What will happen to the measurements?

How would you convert a voltmeter that can measure up to 150 V to an ammeter which can measure current up to 8A ? Resistance of the voltmeter is 300Omega.

A voltmeter and an ammeter are connected in series to an ideal cell of emf E. The voltmeter readings is V and the ammeter reading is I. Choose the correct options.

The emf E and internal resistance r of the cell shown in fig. are 4.3 V and 1 ohm respectively. The resistances of ammeter A and voltmeter V are 2Omega and 200Omega respectively. Then, the readings in the ammeter and voltmeter

A battery of emf 1.4V and interna! resistance 2Omega is connected to a resistor of 100Omega resistance through an ammeter. The resistance of ammeter is 4/3Omega a voltmeter has also been connected to find the potential difference across the resistor. The voltmeter reads 1.10V. What is the error in the reading ?

CHHAYA PUBLICATION-ALTERNATING CURRENT -EXERCISE (Very Short Answer Type)
  1. The instantaneous current in an ac circuit is I=6sin314tA. What is the...

    Text Solution

    |

  2. An alternating current is I=cos 100 pitA. Find out its frequency, peak...

    Text Solution

    |

  3. Why a dc voltmeter and dc ammeter cannot read ac?

    Text Solution

    |

  4. What will be the phase difference between current and emf when 220 V, ...

    Text Solution

    |

  5. What is the unit of impedance?

    Text Solution

    |

  6. What is the reactance of pure resistances in an ac circuit?

    Text Solution

    |

  7. If an LCR circuit is connected to a dc source , what will be the curre...

    Text Solution

    |

  8. What will be the reactance if a current of frequency f flows through a...

    Text Solution

    |

  9. What will be the reactance if a current of frequency f flows through a...

    Text Solution

    |

  10. If the frequency of an circuit is increased, how would the reactance o...

    Text Solution

    |

  11. If the frequency of an circuit is increased, how would the reactance o...

    Text Solution

    |

  12. In an LR circuit, the alternating currentthe alternating emf by a cert...

    Text Solution

    |

  13. In a CR circuit, the alternating current the alternating emf by a cert...

    Text Solution

    |

  14. In an alternating series LCR circuit ,what is the phase difference bet...

    Text Solution

    |

  15. When does LCR series circuit have minimum impedance?

    Text Solution

    |

  16. What is the reactance of a capacitor of capacitance C at fHz?

    Text Solution

    |

  17. What is the power factor of a circuit having a pure resistance only?

    Text Solution

    |

  18. What is the power dissipated in an ac circuit in which voltage and cur...

    Text Solution

    |

  19. What is the natural frequency of an LC oscillator?

    Text Solution

    |

  20. Indicate the change in emf produced by an ac dynamo in the following c...

    Text Solution

    |