Home
Class 12
PHYSICS
A constant current of 2.8 A exists in a ...

A constant current of `2.8 A` exists in a resistor. The rms current is

A

`2.8A`

B

about 2A

C

`1.4A`

D

none

Text Solution

Verified by Experts

The correct Answer is:
A

`i_(rms) = i_(dc) = 2.8A` .
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    CP SINGH|Exercise EXERCISES|84 Videos
  • BOHR THEORY

    CP SINGH|Exercise Exercises|80 Videos

Similar Questions

Explore conceptually related problems

A constant current of 1.0 A is maintained in a resistor of 12 Omega . The amount of charge that flows through this resistor in one minute will be ________.

A steady dc current of 2.83A is flowing in a resistance wire. The rms value of this current is-

A constant current of 1.5 A is maintained in a resistance of 5 Omega . What is its r.m.s. value ?

A constant current of magnitude sqrt(2) A is flowing through a resistor when connected to a DC source. What is rms current flowing through the resistor ?

The rms value of alternating current which when passed through a resistor produces heat energy four times that produced by directed current of 2 A through the same resistor in same time is

A alternating voltage given by V = 140 sin 314 t is connected across a pure resistor of 50 ohm. Find the rms current through the resistor.

The electric current in a circuit is given by i = 3t. Find the rms current for the period t = 0 to t = 2 sec

An AC current is given as i=(2cos omega t+3sin omega t) A.The rms current is "

CP SINGH-ALTERNATING CURRENT-EXERCISES
  1. An alternating voltage V =200sqrt2 sin 100 t where V is in volt and t ...

    Text Solution

    |

  2. What is the r.m.s. value of an alternating current which when passed t...

    Text Solution

    |

  3. A constant current of 2.8 A exists in a resistor. The rms current is

    Text Solution

    |

  4. Choose the currect option .

    Text Solution

    |

  5. The rms value of potential difference V shown in the figure is

    Text Solution

    |

  6. Which one of the follwing represents the variation of capacitive react...

    Text Solution

    |

  7. A resistor R and the capacitor C are connected in series across an ac ...

    Text Solution

    |

  8. An alternating voltage is connected in series with a resistance R and ...

    Text Solution

    |

  9. An ideal inductor of (1//pi) is connected in series with a 300gamma re...

    Text Solution

    |

  10. An ideal inductive coil has a resistance of 100gamma When an ac signal...

    Text Solution

    |

  11. When 100V dc is applied across a coil a current of 1 A flows through i...

    Text Solution

    |

  12. An ideal inductor takes a current of 10 A when connected to a 125V 50H...

    Text Solution

    |

  13. An ac source of angular frequency omega is fed across a resistor R and...

    Text Solution

    |

  14. An inductor-coil having some resistance is connected to an AC source. ...

    Text Solution

    |

  15. When an ac source of emfe=E(0) sin (100 t) is connected across a circu...

    Text Solution

    |

  16. In an LCR series ac circuit the voltage across L,C and R are V(1), V(2...

    Text Solution

    |

  17. A resistor an inductor and a capacitor are connected in series to an a...

    Text Solution

    |

  18. The phase difference between the current and voltage of LCR circuit in...

    Text Solution

    |

  19. An LCR series circuit contains L = 8 H, C = 0.5 muF and R =100 Omega T...

    Text Solution

    |

  20. In an LCR series circuit the capacitance is changed from C to 4C For t...

    Text Solution

    |