Home
Class 12
PHYSICS
A light bulb is rated at 100 W for a 220...

A light bulb is rated at 100 W for a 220 V ac supply . The resistance of the bulb is

A

`48Omega`

B

`484Omega`

C

`480Omega`

D

`350Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
Given, `P=100W,V=220V`.
The resistance of the bulb is
`R=(V^(2))/(P)=((220V)^(2))/(100W)=484Omega`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Example 2|28 Videos

  • ELECTROMAGNETIC INDUCTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Example 30|1 Videos

  • ELECTROMAGNETIC INDUCTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CONER|34 Videos

  • ELASTICITY

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|16 Videos

  • ELECTRONS AND PROTONS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|19 Videos

Similar Questions

Explore conceptually related problems

A light bulb is rated at 100 W for a 220 V supply. Find (a) the resistance of the bulb. (b) the peak voltage of the source (c ) the rms current through the bulb.

A light bulb is rated 100W for a 220V supply. The resistance of the bulb and the peak voltage of the source respectively are

(a) For a given a.c., i = i_(m) sin wt, show that the average power dissipated in a resistor R over a complete cycle is (1)/(2) i._(m)^(2) R . (b) A light bulb is rated at 100 W for a 220 V a.c. supply. Calculate the resistance of the bulb.

A light bulb is rated 200 W for 220 V supply at 50 Hz. Calculate resistance of the bulb and rms current through the bulb.

A light bulb is rated 100 W for 220 V ac supply of 50 Hz. Calculate (i) the resistance of the bulb, (ii) the rms current through the bulb.

A light bulb is rated 150 W for 220 V ac supply of 60 Hz. Calculate (i) the resistance of the bulb, (ii) the rms current through the bulb.

For a light bulb rated at 110 W for a 200 V supply calculate its resistance and peak voltage of the source. Also calculate the runs current through the bulb.

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

[" -) A light bulb is rated "100W" for "220V" ac supply of "50Hz" .Calculate "],[" i) the resistance of the bulb."],[" ii) the rms current through the bulb "]

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROMAGNETIC INDUCTION-Example 1
  1. Voltage and current in an ac circuit are given by V=5 sin (100 pi t-...

    Text Solution

    |

  2. To express AC power in the same from as DC power, a special value of c...

    Text Solution

    |

  3. A light bulb is rated at 100 W for a 220 V ac supply . The resistance ...

    Text Solution

    |

  4. The peak vlaue of alternating current is 5sqrt(2). The mean square val...

    Text Solution

    |

  5. If reading of an ammeter is 10 A, the peak value of current is

    Text Solution

    |

  6. For high frequency, a capacitor offers

    Text Solution

    |

  7. Alternating current is transmitted to distant places at

    Text Solution

    |

  8. In an a.c. Circuit the voltage applied is E=E(0) sin (omega)t. The res...

    Text Solution

    |

  9. RMS value of AC current is . . . . A . . . . Times its peak value. He...

    Text Solution

    |

  10. If L and R denote the inductance and resistance of a coil respectively...

    Text Solution

    |

  11. The average power dissipated in AC circuit is 2W. If a current flowing...

    Text Solution

    |

  12. A lamp consumes only 50% of peak power in an a.c. circuit. What is the...

    Text Solution

    |

  13. In an electrical circuit R,L,C and an AC voltage source are all connec...

    Text Solution

    |

  14. The impedance of a circuit, when a resistance R and an inductor of in...

    Text Solution

    |

  15. An inductive coil has a resistance of 100 Omega. When an AC signal of ...

    Text Solution

    |

  16. A circuit contains a capacitor and inductance each with negligible res...

    Text Solution

    |

  17. The instantaneous values of current and voltage in an AC circuit are g...

    Text Solution

    |

  18. In a LCR circuit the P.D between the terminals of the inductance is 60...

    Text Solution

    |

  19. In the non-resonant circuit, what will be the nature of the circuit fo...

    Text Solution

    |

  20. The value of alternating emf E in the given circuit will be

    Text Solution

    |