Home
Class 12
PHYSICS
Alternating current cannot be measured b...

Alternating current cannot be measured by a d.c. ammeter because

A

a.c. cannot pass through d.c. ammeter.

B

a.c. changes its direction.

C

average value of a.c. for complete cycle is zero.

D

a.c. is virtual

Text Solution

Verified by Experts

The correct Answer is:
C
Alternating current cannot be measured by a d.c. ammeter because average value of an a.c. for a complete cycle is zero.
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    U-LIKE SERIES|Exercise FILL IN THE BLANKS|11 Videos

  • ALTERNATING CURRENT

    U-LIKE SERIES|Exercise TRUE OR FALSE|10 Videos

  • ALTERNATING CURRENT

    U-LIKE SERIES|Exercise CASE BASED/SOURCE-BASED INTEGRATED QUESTIONS|19 Videos

  • ATOMS

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION C)|2 Videos

Similar Questions

Explore conceptually related problems

Alternating current can not be measured by D.C. Ammeter because

Alternating current can be measured with the help of

In a circuit, the value of the alternating current is measured by hot wire ammeter as 10 ammeter. Its peak value will be

A galvanometer of resistance 50Omega is converted into an ammeter by connecting a low resistance (shunt) of value 1Omega in parallel to the galvanometer, S. If full - scale deflection current of the galvanometer is 10 mA, then the maximum current that can be measured by the ammeter is -

If the galvanometer current is 10 mA, resistance of the galvanometer is 40 Omega and shunt of 2 Omega is connected to the galvanometer, the maximum current which can be measured by this ammeter is

An ammeter consists of a galvanometer of a resistance 45 Omega shunted with a resistance of 3 Omega . If the current rating of that can be measured by the ammeter will be

U-LIKE SERIES-ALTERNATING CURRENT -MULTIPLE CHOICE QUESTIONS
  1. Alternating current cannot be measured by a d.c. ammeter because

    Text Solution

    |

  2. In an a.c. circuit with voltage V and current I, the power dissipated ...

    Text Solution

    |

  3. If the rms current in a 50 Hz a.c. circuit is 5 A, the value of the cu...

    Text Solution

    |

  4. The power factor of LCR a.c. circuit at resonance is

    Text Solution

    |

  5. An inductor of reactance 1 Omega and a resistor of 2 Omega are conne...

    Text Solution

    |

  6. In an a.c. series circuit, the instantaneous current is maximum when t...

    Text Solution

    |

  7. An a.c. voltage source of variable angular frequency w and fixed ampli...

    Text Solution

    |

  8. The output of a step down transformer is measured to be 24 V when conn...

    Text Solution

    |

  9. A transformer is used to light a 100 W and 110 V lamp from a 220 V mai...

    Text Solution

    |

  10. In an a.c. circuit an alternating voltage V = 200 sqrt(2) sin 100t vol...

    Text Solution

    |

  11. In a series resonant LCR circuit, the voltage across R is 100 volts an...

    Text Solution

    |

  12. An a.c. voltage is applied to a pure inductor L and drives a current i...

    Text Solution

    |

  13. In the given circuit the reading of voltmeter V(1) and V(2) are 300 ...

    Text Solution

    |

  14. In a series LCR circuit R = 200 Omega and the voltage and the frequen...

    Text Solution

    |

  15. A generator produces a voltage that is given by V = 311 sin 314 t, whe...

    Text Solution

    |

  16. The peak value of 220 V of a.c. mains is

    Text Solution

    |

  17. In a sinusoidal a.c. circuit the rms value of current (I(rms) ) is rel...

    Text Solution

    |

  18. In an a.c. circuit containing capacitance only

    Text Solution

    |

  19. An alternating current by frequency v is flowing in a circuit containi...

    Text Solution

    |

  20. Power delivered by the source of an a.c. circuit is maximum when

    Text Solution

    |