Home
Class 12
PHYSICS
The ration of the restistances of 100 W ...

The ration of the restistances of 100 W and 40 W bulbs of the same rated voltage is

A

`2:5`

B

`5:2`

C

`25 :4`

D

`4 :25`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC ENERGY AND POWER

    CHHAYA PUBLICATION|Exercise EXERCISE (Very Short Answer Type Questions )|18 Videos

  • ELECTRIC ENERGY AND POWER

    CHHAYA PUBLICATION|Exercise EXERCISE ( Short Answer Type Questions - I)|6 Videos

  • ELECTRIC ENERGY AND POWER

    CHHAYA PUBLICATION|Exercise HIGHER ORDER THINKING SKILL (HOTS)QUESTIONS|17 Videos

  • DIGITAL CIRCUITS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|6 Videos

  • ELECTRIC FIELD

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|31 Videos

Similar Questions

Explore conceptually related problems

A parallel plate capacitor in series with a resistance of 100 Omega , an inductor of 20 mH and an AC voltage source of variable frequency shows resonance at a frequency of (1250)/pi Hz: If this capacitor is charged by a DC voltage, source to a voltage 25 V, what amount of charge will be stored in each plate of the capacitor ?

What is the resistance of the filament of a 220V-60 W bulb ? If the bulb is used in a 110 V line instead of 220 V line, then what amount of power it will consume ?

The powers of three bulbs 40 W , 60 W and 100 W . When the supply voltage is 220V. Which will greatest brighter?

Find the ratio of resistances for two bulbs of 220 V-60W and 110V-60W.

A 220 V -60W electric bulb is connected in 220 V line . What is the resistance of the filament of the bulb , when it is tured on ?

Two electric lamps of power 30 W and 60 W have the same voltage rating . Find the ratio of their resistances .

What is the resistance of the filament of a bulb, on which it is written '220V-100W'?

In an evening college there are 100 bulbs of 60 W each , 80 bulbs of 100W each and 70 fans of 100 W each . They run for 5 h , 4 h and 4 h respectively per day . If each kW . H costs Rs. 0.50 , calculate the electric bill of the college for a month .