Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

Two bodies A and B have emissivities 0.5 and 0.8 respec .At some tempt the two bodies have emissive powers at these tempt.
Asked by m.nilu | 08 Dec, 2018, 01:49: PM
answered-by-expert Expert Answer
To find exact value of of emissive power you need to have temperature of the surface and surface area of body.
Since emissive power is directly propotional to emissivity
So Pa/Pb=0.5/0.8
Answered by Ankit K | 09 Dec, 2018, 12:45: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 11-science - Physics
a body cools from 90°c to 70°c in 5minutes. temperature of surrounding is 30°c. its temperature after next 10 min is
Asked by manjushri30nov | 31 Dec, 2023, 07:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
the unit of thermal conductivity is
question image
Asked by abhishekmadheshiya708 | 22 Dec, 2023, 01:38: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
  The temperature of perfect black body changes from 3000K to 4000K.What is the percentage change in energy radiation.
Asked by ankitvariya1000 | 29 Mar, 2022, 11:19: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
The temperature of perfect black body changes from 3000K to 4000K.What is the percentage change in energy radiation.
Asked by jatinsahu37 | 27 Mar, 2022, 04:45: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A furnace emits radiation at 2000 K. Treating it as black body radiation, calculate Wave length at which emission is maximum and the corresponding radiant flux density
Asked by vikranthpoluparthi1 | 04 May, 2021, 12:30: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
 A furnace emits radiation at 2000 K. Treating it as a black body radiation, calculate the monochromatic radiant flux density at 1 micron m wavelength
Asked by prabhakararao viriyala | 14 Jun, 2020, 12:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
There are two thin spheres A and B of the same material and same thickness.They emit like black bodies.Radius of A is double that of B.A and B have same tempt. T .When A and B are kept in a room of tempt T0(less than T),the ratio of their rates of cooling (rate of fall of tempt) is
Asked by m.nilu | 08 Dec, 2018, 02:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Two bodies A and B have emissivities 0.5 and 0.8 respec .At some tempt the two bodies have emissive powers at these tempt.
Asked by m.nilu | 08 Dec, 2018, 01:49: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Explain the working of room heater. How can we increase the efficiency of convections in radiator of a room heater?
Asked by Topperlearning User | 15 Apr, 2015, 04:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
By what mode of heat transfer is mercury heated?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×