Home
Class 10
PHYSICS
Derive an expression for the heat produc...

Derive an expression for the heat produced by electric current and state Joule's Law.

Text Solution

Verified by Experts

`P= Vxx(Q)/(T)`
P =VI
`H=Pxxt`
`= Vixxt = Vit`
H= IRIt [ V = IR , Ohm.s law ]
`=I^(2) Rt.`
Joule.s Law : When current of l ampere flows in a wire of resistance R `Omega` for t seconds, the heat energy disspated by it is given by `H= I^(2) Rt`
Promotional Banner

Topper's Solved these Questions

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise NCERT CORNER ( Intext Questions )|23 Videos

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise Textbook Exercises|22 Videos

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-2 ( Short Answer Type Questions -II )|53 Videos

  • LIGHT-REFLECTION AND REFRACTION

    OSWAAL PUBLICATION|Exercise NCERT CORNER (TEXTBOOK EXERCISES)|15 Videos

Similar Questions

Explore conceptually related problems

Which device produces an electric current ?

Derive an expression for electrical conductivity.

Explain the mechanical effect produced by an electric current.

Give the expression for the amount of heat conducted in a steady state.

Obtain an expression for the heat produced in a conductor when a voltage V is applied across it. Heating effect of electric current is desirable as well as undesirable. Explain this statement.

A marine cartilaginous fish that can produce electric current is

OSWAAL PUBLICATION-ELECTRICITY-TOPIC-2 ( Long Answer Type Questions )
  1. Draw a schematic diagram of a circuit consisting of a battery of three...

    Text Solution

    |

  2. Two wires of equal length, one of copper and the other of manganin hav...

    Text Solution

    |

  3. Derive an expression for the equivalent resistance of three resistors ...

    Text Solution

    |

  4. Fuse of 3A, 5A and 10A are available. Calculate and select the fuse fo...

    Text Solution

    |

  5. What is meant by the statement that the resistance of a wire is 1 Omeg...

    Text Solution

    |

  6. Two identical resistors each of resistance 12 Omega are connected (i) ...

    Text Solution

    |

  7. How is a voltmeter connected in the circuit to measure the potential d...

    Text Solution

    |

  8. Explain the term : Heating effect of electric current.

    Text Solution

    |

  9. Derive an expression for the heat produced by electric current and sta...

    Text Solution

    |

  10. Why are electric bulbs filled with chemically inactive nitrogen or arg...

    Text Solution

    |

  11. State Ohm's law. Give mathematical relation between potentW difference...

    Text Solution

    |

  12. When a 12 V battery is connected across an unknown resistor there is a...

    Text Solution

    |

  13. Two wires X and Y are of equal length and have equal resistances. If t...

    Text Solution

    |

  14. Study the following current time graphs from two different sources. ...

    Text Solution

    |

  15. Calculate the resistance of the wire using the graph.

    Text Solution

    |

  16. How many 176Omega resistors (in parallel) are required to carry 5A on ...

    Text Solution

    |

  17. Define electric power. Derive relation between power, potential differ...

    Text Solution

    |

  18. Draw a labelled circuit diagram to study the relationship between the ...

    Text Solution

    |

  19. Find out the following in the electric circuit given in the figure. ...

    Text Solution

    |

  20. Two conductors A and B of resistances 5 Omega and 10 Omega respectivel...

    Text Solution

    |