A 60 w bulb has a filament temperature of 2000 K. what will be the wattage of another bulbs of same filament area and material at a temperature of 400

Question

A 60 w bulb has a filament temperature of 2000 K. what will be the wattage of another bulbs of same filament area and material at a temperature of 400

A 60 w bulb has a filament temperature of 2000 K. what will be the wattage of another bulbs of same filament area and material at a temperature of 4000 K?
A. 8 w
B. 32 w
C. 64 w
D. 960 w

Monjur Alahi

7 views

2025-01-04 04:42

1 Answers

Related Questions

Two strings of the same material and the same area of cross-section are used in an wxperiment. One is loaded with 12 kg and the other with 3 kg The fu

2 Answers 5 Views

A susceptibility of a certain magnetic material is 400. What is the class of the magnetic material?

2 Answers 4 Views

Two wires made of the same material and of same area of cross-section are 1 m and 2 m long respectively. If a force required to change the length of 1

2 Answers 5 Views

There are two strings of same material same diameter and length l and 2l stretched under same tension . If the strings are plucked and released, veloc

2 Answers 4 Views

The filament of an evacuated light bulb has a length 10 cm, diameter 0.2 mm and emissivity 0.2. then the power it radiates at `1727^(@)C` is [`sigma=5

2 Answers 8 Views

Two sphere of the same material and radii 4 m and 1m respectively are at temperature 1000 K and 2000 K respectively. The ratio of energies radiated by

2 Answers 4 Views

A solid cube and a sphere are made of the same material and both have the same surface area. If both are at the temperature of 300 K then initial

2 Answers 6 Views

A current `I=3 sin omega t` ampere flows through a bulb. The P.D. across the bulb is given by `V=4 cos omega t` volt. The power dissipated in the bulb

2 Answers 4 Views

A ultra violet light bulb, emitting 400 nm and infrared bulb emitting 700 nm wavelength radiation each are rated at 130 W. Then the ratio of the numbe

2 Answers 10 Views

5. Radha had been using an inexpensive filament-based light bulb which gives off yellow/orange light to lit her room. Now, as she has started earning, she wants to bring home a tubular lamp which involves a two-step process of generation of light and gives off white light after blinking for a few seconds. Identify the lightinper her requirement.

2 Answers 7 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
`(P_(2))/(P_(1))=(T_(2)^(4))/(T_(1)^(4))=((4000)/(2000))^(4)=16`
`P_(2)=16xxP_(1)=16xx60=960w`
`P=sigma A rhoT^(4)`

7 views Answered 2023-02-05 15:29