If voltage across a bulb rated 220 volt-...

If voltage across a bulb rated 220 volt-100 watt drops by `2.5 %` of its value, the percentage of the rated value by which the power would decrease is

A

`20%`

B

`2.5%`

C

`5%`

D

`10%`

Text Solution

Verified by Experts

Topper's Solved these Questions

ATOMS
DISHA|Exercise PHYSICS|74 Videos
DUAL NATURE OF MATTER AND RADIATION
DISHA|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

If voltage across a bulb rated 22 volt 100 watt drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is

If voltage across a bulb rated 220volts 100watts drops by 2.5% of its rated value,the percentage of the rated value by which the power would decrease is :-

If voltage across a bulb rated 220 V, 160 W drops by 3% of its rated value, the percentage of the rated value by which the power would decrease is

If voltage across a bulb rated 220 V – 100 W drops by 2.5% of its rated value, the percentage of the rated value by which the fractional power would decrease, is -

An electric bulb is rated 220 volt - 100 watt. The power consumed by it when operated on 110 volt will be

The voltage across a bulb is decreased by 2%. Assuming that the resistance of the filament remains unchanged, the power of the bulb will

The voltage across an electric bulb is decreased by 2% . Assuming that the resistance of the filament remains same, the power consumed will

If the current in a electric bulb drops by 2% then the power decreases by

DISHA-CURRENT ELECTRICITY-PHYSICS

If n, e, tau, m, are representing electron density charge, relaxation ...
Text Solution
|
2A cell having an emf epsilon and internal resistance r is connected a...
Text Solution
|
If voltage across a bulb rated 220 volt-100 watt drops by 2.5 % of its...
Text Solution
|
If specific resistance of a potentiometer wire is 10^(–7 ) Omega m, th...
Text Solution
|
Two resistance R(1) and R(2) are made of different material. The tempe...
Text Solution
|
Five cells each of emf E and internal resistance r send the same amoun...
Text Solution
|
The length of a given cylindrical wire is increased by 100%. Due to th...
Text Solution
|
Potentiometer wire of length 1 m is connected in series with 490 Omega...
Text Solution
|
See the electrical circuit shown in this figure. Which of the followin...
Text Solution
|
In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 f...
Text Solution
|
Two sources of equal emf are connected to an external resistance R. Th...
Text Solution
|
The resistance of the series combination of two resistances is S. When...
Text Solution
|
If an ammeter is to be used in place of a voltmeter, then we must conn...
Text Solution
|
A d.c. main supply of e.m.f. 220 V is connected across a storage batte...
Text Solution
|
In the given circuit digram when the current reaclies steady state in ...
Text Solution
|
Suppose the drift velocity v(d) in a material varied with the applie...
Text Solution
|
In a neon discharge tube 2.9 xx 10^(18) Ne^(+) ions move to the right ...
Text Solution
|
Two rods are joined end to end, as shown. Both have a cross-sectional ...
Text Solution
|
An energy source will supply a constant current into the load if its i...
Text Solution
|
The resistance of a wire at room temperature 30^(@)C is found to be 10...
Text Solution
|