Home
Class 10
PHYSICS
An electric heater a current of 5 A and ...

An electric heater a current of `5 A` and its element has a resistance of `50 Omega`. If the heater is switched on for `5` minutes, calculate the energy released in kilojoules.

Text Solution

Verified by Experts

The correct Answer is:
375 kJ
`W = I^2 Rt = (5 A)^2 (50 Omega)(5 xx 60 s) = 375000 J = 375 kJ`.
Promotional Banner

Topper's Solved these Questions

  • ELECTRICITY

    PRADEEP|Exercise (Exemplar)Multiple Choice|18 Videos

  • ELECTRICITY

    PRADEEP|Exercise (Mock Test)Sec -A|21 Videos

  • ELECTRICITY

    PRADEEP|Exercise Value Based Question|4 Videos

  • MAGNETIC EFFECTS OF ELECTRIC CURRENT

    PRADEEP|Exercise Mock Test|21 Videos

Similar Questions

Explore conceptually related problems

An electric room heater has a resistance of 25 Omega and operates at 220 V for 12 minutes. Calculate heat energy dissapated by it in kilojoules.

A torch bulb of 3 V draws a current of 0.4 A . If the bulb is switched on for 5 minutes, calculate the energy released by the bulb.

An electric heater draws a current of 5 A when connected to 220 V mains. Calculate the resistance of its filament.

Power of an electric heater is 1000 W and it is run for 1 hour. Calculate the energy consumed by it.

(a) what is menat by the heating effect of current ? State three factors on which the heat produced in a wire by an electric current depends. (b) Explain why, through the heating element of an electric heater glows, but its connecting cord does not l glow. ( c) An electric geyser of resistance 20 Omega takes a current of 5 A. calculate the heat produced in 2 minutes. (d) Name the commercial unit of electric energy. How many joules are equal to this unit ?

A wire has a length of 2.0 m and a resistance of 5.0 Omega . Find the electric field existing inside the wire if it carries a current of 10 A.

An electric heater of resistance 8 Omega draws 15 A from the service mains for 2 hours. Calculate the rate at which heat is developed in the heater.

An electric heater of resistance 6 ohm is run for 10 minutes on a 120 volt line. The energy liberated in this period of time is

A current of 5.0A flows through an electric press of resistance 44Omega . Calulate the energy consumed by the press in 5minutes.

PRADEEP-ELECTRICITY-Problem For Practice
  1. A electric iron consumes energy at the rate of (a) 840 W when heatin...

    Text Solution

    |

  2. A torch bulb of 3 V draws a current of 0.4 A. If the bulb is switched ...

    Text Solution

    |

  3. An electric heater a current of 5 A and its element has a resistance o...

    Text Solution

    |

  4. An electric room heater has a resistance of 25 Omega and operates at 2...

    Text Solution

    |

  5. Calculate the total power of 5 fans if each of them draws a current of...

    Text Solution

    |

  6. An electric bulb of resistance 400 Omega, draws a current of 0.5 A. Ca...

    Text Solution

    |

  7. A soldering rod iron draws an energy of 45000 J in 4 minutes when the ...

    Text Solution

    |

  8. An electric bulb is marked 250 W - 200 V. What information does it con...

    Text Solution

    |

  9. 100 J of heat are produced each second in a 4 Omega resistance. Find t...

    Text Solution

    |

  10. An electric bulb is connected to a 220 V generator. The current is 0.5...

    Text Solution

    |

  11. An electric refrigerator rated 400 W operates 8 hour//day. What is the...

    Text Solution

    |

  12. Two bulbs of 100 W each and two coolers of 250 W each, work on an aver...

    Text Solution

    |

  13. An electric kettle is rated at 230 V, 1000 W. What is the resistance o...

    Text Solution

    |

  14. Two bulbs A and B are rated 100W - 120 V and 10 W - 120 V respectively...

    Text Solution

    |

  15. Draw a circuit diagram of an electric circuit containing a cell, a key...

    Text Solution

    |

  16. A resistance of 10 Omega is bent in the from of a closes circle. What ...

    Text Solution

    |

  17. State which has a higher resistance : a 50 W or a 25 W lamp and how ma...

    Text Solution

    |

  18. An electric geyser has the rating 2000 W-220 V marked on it. What shou...

    Text Solution

    |

  19. Two resistors with resistances 10 Omega and 15 Omega are to be connect...

    Text Solution

    |

  20. What is the safest voltage you can put across a 98 Omega-0.5 W resisto...

    Text Solution

    |