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A light bulb is rated 100W for a 220V su...

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

`242Omega`

B

`484Omega`

C

`384 Omega`

D

`100 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

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

    A
    `284 Omega`
    B
    `384 Omega`
    C
    `484 Omega`
    D
    `584 Omega`

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

    A
    `708 Omega`
    B
    `870 Omega`
    C
    `807 Omega`
    D
    `780 Omega`
    • AAKASH INSTITUTE-Mock Test 33: PHYSICS-Example
    1. A light bulb is rated 100W for a 220V supply. The resistance of the bu...

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    2. A 100W, 200V bulb is operated on a 110V line. The power consumed is

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    3. A student wants to project the image of a candle flame on a screen 60c...

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    4. Find capacitive reactance of a capacitor connected to a dc source.

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    5. An alternative current is given by I = (100sqrt2 sint) A. The RMS valu...

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    6. The voltage over a cycle varies as V=V(0)sin omega t for 0 le t le (...

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    7. An alternating current is given by I = i1 cos omegat + i2 sin omegat...

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    8. The average value of an alternating voltage V=V(0) sin omega t over ...

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    9. Which of the following is true for an ideal capacitor connected to a s...

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    10. A direct current of 5 amp is superimposed on an alternating current I=...

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    11. For an ideal inductor, connected across a singusoidal ac volatage sour...

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    12. A resistor and a capacitor are connected in series with an a.c. source...

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    13. In an electrical circuit R,L, C and a.c voltage source are all connect...

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    14. If a 16Omegaresistance and 12 Omega inductive reactance are present in...

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    15. Define quality factor in electrical resonance circuit. Find quality fa...

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    16. If resistance R =100 Omega, inductance L = 12mH and capacitance C=15mu...

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    17. A 12 Omega resistor and a 0.21 H inductor are connected in series to a...

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    18. In a circuit L,C and R are connected in series with an altematng volta...

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    19. In an AC circuit, the instantaneous values of e.m.f and current are e...

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    20. In series LCR circuit, the phase difference between voltage across L a...

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