Home
Class 12
PHYSICS
A steady current of magnitude I and an A...

A steady current of magnitude `I` and an `AC` current of peak value `I` are allowed to pass through identical resistors for the same time. The ratio of heat produced in the two resistors will be

A

`2:1`

B

`1:2`

C

`1:1`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
`H_(DC)=I^2Rt`
`H_(AC)=I_(rms)^2Rt=(I/sqrt2)^2Rt=(I^2Rt)/2`
`:. H_(DC)/H_(AC)=2/1`
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    DC PANDEY|Exercise Level - 1 Subjective|6 Videos

  • ALTERNATING CURRENT

    DC PANDEY|Exercise Level- 2 Single Correct|18 Videos

  • ALTERNATING CURRENT

    DC PANDEY|Exercise Level 1 Assertion-Reason|11 Videos

  • ATOMS

    DC PANDEY|Exercise MEDICAL ENTRANCES GALLERY|42 Videos

Similar Questions

Explore conceptually related problems

A direct current of 2 A and an alternating current having a maximum value of 2 A flow through two identical resistances. The ratio of heat produced in the two resistances will be

A direct current of 2A and an AC of peak value 2A flows through resistances 2Omega and 1Omega respectively. Find the ratio of heat produced in the two resistances in same interval.

The value of current through 2 Omega resistor is

A current of 5 ampere flows in a 10 -ohm resistor. Calculate the rate of heat energy produced in the resistor.

If the current flowing through a fixed resistor is halved, the heat produced in it will become:

An electric current of 4.0A flows through a 12Omega resistor. What is the rate at which heat energy is produced in the resistor?

In the figure given below, the current passing through 6Omega resistor is

The peak value of the a.c. current flowing throw a resistor is given by

DC PANDEY-ALTERNATING CURRENT-Level - 1 Objective
  1. The current and voltage functions in an AC circuit are i=100 sin 100...

    Text Solution

    |

  2. A capacitor becomes a perfect insulator is

    Text Solution

    |

  3. For an alternating voltave V=10 cos 100 pit volt, the instantenous vol...

    Text Solution

    |

  4. In a purely resistive AS circuit,

    Text Solution

    |

  5. Identify the graph which correctly reperesents the variation of capaci...

    Text Solution

    |

  6. In an AC circuit, the impedance is sqrt3 times the reactance, then the...

    Text Solution

    |

  7. Voltage applied to an AC circuit and current flowing in it is given by...

    Text Solution

    |

  8. A current of 4A flows in a coil when connected to a 12V DC source. If ...

    Text Solution

    |

  9. In the circuit shown in figureure, the reading of the AC ammeter is ...

    Text Solution

    |

  10. An AC voltage is applied acrss a series combination of L and R. If the...

    Text Solution

    |

  11. For wattless power is an AC circuit, the phase angle between the curre...

    Text Solution

    |

  12. The correct variation of resistance R with frequency f is given by

    Text Solution

    |

  13. If L and R be the inductance and resistance of the choke coil, then in...

    Text Solution

    |

  14. When an AC signal of frequency 1 kHz is applied across a coil of resis...

    Text Solution

    |

  15. The frequency of an alternating current is 50 Hz. The minimum time tak...

    Text Solution

    |

  16. The current and voltage functions in an AC circuit are i=100 sin 100...

    Text Solution

    |

  17. In the AC network shown in figureure the rms current flowing through t...

    Text Solution

    |

  18. The figure represents the voltage applied across a pure inductor. The ...

    Text Solution

    |

  19. A steady current of magnitude I and an AC current of peak value I are ...

    Text Solution

    |

  20. A 50 Hz AC source of 20 V is connected across R and C as shown in fig...

    Text Solution

    |