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

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

Text Solution

Verified by Experts

The correct Answer is:
`44 Omega`
`R = V//I = 220 V//5 A = 44 Omega`
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 iron draws a current of 4 A when connected to a 220 V mains. Its resistance must

A heater draws a current of 2 A when connected to a 250 V source. The rate of energy dissipation is

A lamp of 600W-240V is connected to 220 V mains. Its resistance is

A bulb of resistance 400 Omega is connected to 220 V mains. Calculate the magnitude of current.

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.

An electric bulb draws a current of 0.2 A when the voltage is 220 Calculate the amount of electric charge flowing through it in one hour.

An electric bulb is rated 60 W , 220 V . The resistance of its filament is

An electric heater rated 220 V and 550 V is connected to AC mains. The current drawn by it is

A transformer is used to step down mains supply of 220 V to 22 V. Its primary draws a current of 6 A and secondary draws a current of 50 A . Calculate the efficiency of the transformer .

An electric heater has a rating of 3 kW, 220 V . Calculate the following (i) Current. (ii) Resistance offered by the heater. (iii) Cost of running the heate for 10 hours at the rate of ₹ 3.50 per unit.

PRADEEP-ELECTRICITY-Problem For Practice
  1. A current of 0.2 A flows through a conductor of resistance 4.5 Omega. ...

    Text Solution

    |

  2. A bulb of resistance 400 Omega is connected to 220 V mains. Calculate ...

    Text Solution

    |

  3. An electric heater draws a current of 5 A when connected to 220 V main...

    Text Solution

    |

  4. (a) How much current will an electric bulb draw from a 220 V source, i...

    Text Solution

    |

  5. The potential difference between the terminals of an electric heater i...

    Text Solution

    |

  6. A 4 Omega wire is doubled on it. Calculate the new resistance of the w...

    Text Solution

    |

  7. When a potential difference of 2 V is applied across the ends of a wir...

    Text Solution

    |

  8. What should be the length of a nichrome wire of resistance 4.5 Omega, ...

    Text Solution

    |

  9. A negligibly small current is passes through a wire of length 15 m and...

    Text Solution

    |

  10. A metal wire of resistivity 64 xx 10^-6 ohm cm and length 198 cm has a...

    Text Solution

    |

  11. Calculate the resistivity of the material of a wire 1.0 m long, 0.4 mm...

    Text Solution

    |

  12. The resistivity os copper is 1.76 xx 10^-8 ohm m. The radius of the wi...

    Text Solution

    |

  13. A resistance wire made from German silver has a resistance of 4.25 Ome...

    Text Solution

    |

  14. Resistance of a metal wire of length 1 m is 26 Omega at 20^@ C. If the...

    Text Solution

    |

  15. Calculate the amount of charge that would flow in 2 hours through the ...

    Text Solution

    |

  16. A cylinder of a material is 10 cm long and has a cross-section of 2 cm...

    Text Solution

    |

  17. A piece of wire of resistance 20 Omega is drawn so that its length is ...

    Text Solution

    |

  18. Calculate the area of cross-section of a wire if its length is .0 m, i...

    Text Solution

    |

  19. An electric lamp, whose resistance is 20 Omega and a conductor of 4 Om...

    Text Solution

    |

  20. Three resistors of 2 Omega, 3 Omega and 4 Omega are connected in (a)...

    Text Solution

    |