Home
Class 12
PHYSICS
A DC ammeter cannot measure alternating ...

A `DC` ammeter cannot measure alternating current because

Text Solution

Verified by Experts

No, it is based on the principle of torque. When ac is passing through it (of freq. 50 Hz). It will not respond to frequent change in direction due to inertia hence would show zero deflection.
Promotional Banner

Topper's Solved these Questions

  • UNIT–III & UNIT–IV MAGNETIC EFFECTS OF CURRENT AND MAGNETISM & E.M.I. AND ALTERNATING CURRENT

    CBSE COMPLEMENTARY MATERIAL|Exercise SHORT ANSWERS QUESTIONS (3 Marks)|27 Videos

  • UNIT–III & UNIT–IV MAGNETIC EFFECTS OF CURRENT AND MAGNETISM & E.M.I. AND ALTERNATING CURRENT

    CBSE COMPLEMENTARY MATERIAL|Exercise LONG ANSWER QUESTIONS (5 Marks)|5 Videos

  • UNIT–III & UNIT–IV MAGNETIC EFFECTS OF CURRENT AND MAGNETISM & E.M.I. AND ALTERNATING CURRENT

    CBSE COMPLEMENTARY MATERIAL|Exercise (NUMERICALS)|57 Videos

  • SAMPLE QUESTION PAPER 2019

    CBSE COMPLEMENTARY MATERIAL|Exercise Section C|19 Videos

Similar Questions

Explore conceptually related problems

Can we use galvanometer to measure alternating current ?

An ac ammeter is used to measure currnet in a circuit. When a given direct current passes through the circuit. The ac ammeter reads 3 A. When another alternating current passes through the circuit, the ac ammeter reads 4A. Then find the reading of this ammeter (inA), if dc and ac flow through the circuit simultaneously.

……………….. Instrument is used for the measurement of alternating current .

CBSE COMPLEMENTARY MATERIAL-UNIT–III & UNIT–IV MAGNETIC EFFECTS OF CURRENT AND MAGNETISM & E.M.I. AND ALTERNATING CURRENT-SHORT ANSWER QUESTIONS (2 Marks)
  1. What is the radius of the path of an electron (mass 9 xx 10^(-31) kg a...

    Text Solution

    |

  2. Why is it necessary for voltmeter to have a higher resistance?

    Text Solution

    |

  3. A DC ammeter cannot measure alternating current because

    Text Solution

    |

  4. Define the term: magnetic dipole moment of a current loop. Write the e...

    Text Solution

    |

  5. An ac source of rms voltage V is put across a series combination of an...

    Text Solution

    |

  6. A bar magnet is falling with some acceleration ‘a’ along the vertical ...

    Text Solution

    |

  7. The series L–C–R circuit shown in fig. is in resonance state. What is ...

    Text Solution

    |

  8. The division marked on the scale of an a.c. ammeter are not equally sp...

    Text Solution

    |

  9. Circuit shown here uses an air filled parallel plate capacitor. A mica...

    Text Solution

    |

  10. In the figure shown, coils P and Q are identical and moving apart with...

    Text Solution

    |

  11. An electron is passing through a field but no force is acting on it. U...

    Text Solution

    |

  12. A 1.5 muF capacitor is charged to 57V. The charging battery is then di...

    Text Solution

    |

  13. The self inductance of the motor of an electric fan is 10H. In order t...

    Text Solution

    |

  14. A galvanometer needs 50mV for full scale deflection of 50 Divisions. F...

    Text Solution

    |

  15. A light bulb and an open coil inductor are connected to an ac source t...

    Text Solution

    |

  16. Show that in the free oscillations of an LC circuit, the sum of energi...

    Text Solution

    |

  17. Show that the potential difference across the LC combination is zero a...

    Text Solution

    |

  18. When a large amount of current is passing through solenoid, it contrac...

    Text Solution

    |

  19. Answer the following questions : (a) In any a.c. circuit, is the app...

    Text Solution

    |

  20. A bar magnet M is dropped so that is falls vertically through the coil...

    Text Solution

    |