HomeTestsSearchRankProfile

Radiation Questions

Practice 15 Radiation questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

๐Ÿ“š
15
Total Questions
๐ŸŸข
6
Easy
๐ŸŸก
9
Medium
๐Ÿ”ด
0
Hard
Practice by Exam:Physics(13)General Science(1)General Studies(1)

About Radiation โ€” practice questions, PYQs & concepts

Radiation is a frequently-tested topic on Physics, General Science, General Studies. ExamTest.live currently lists 15 Radiation questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year โ€” every answer key is free, no sign-up required.

Radiation weight in competitive exams

Across our Radiation question bank, the largest sources are Physics (13), General Science (1) and General Studies (1). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 6 easy Radiation questions are available โ€” build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
  • Time yourself: Every question shows the average solve time so you can benchmark your speed against other students.
  • Read every explanation: Even on questions you got right โ€” the explanation often surfaces a faster approach you can reuse.

All Radiation Questions(1โ€“15 of 15)

Filter:
Q1mediummcqPhysicsAIEEE 20042026
0% accuracy
A radiation of energy falls normally on a perfectly reflecting surface. The momentum transferred to the surface is:
Q2mediummcqPhysicsAIEEE 20062026
0% accuracy
Assuming the sun to be a spherical body of radius at a temperature of , evaluate the total radiant power incident on Earth at a distance from the Sun. (where is the radius of the Earth and is Stefanโ€™s constant).
Q3mediummcqGeneral StudiesCompetitive Exam2026
100% accuracy
The heat of the sun reaches us by:
Q4mediummcqPhysicsNEET 20172026
A spherical black body with a radius of radiates power at . If the radius were halved and the temperature doubled, the power radiated in watt would be:
Q5mediummcqPhysicsNEET (UG) 20182026
The power radiated by a black body is and it radiates maximum energy at wavelength, . If the temperature of the black body is now changed so that it radiates maximum energy at wavelength , the power radiated by it becomes . The value of is:
Q6easymcqPhysicsAIEEE 20032026
The earth radiates in the infra-red region of the spectrum. The spectrum is correctly given by:
Q7mediummcqGeneral ScienceCompetitive Exam2026
X-rays are characterized as:
Q8mediummcqPhysicsPhysics2026
Good absorbers of heat are:
Q9mediummcqPhysicsPhysics
0% accuracy
Assuming the sun to have a spherical outer surface of radius , radiating like a black body at temperature , the power received by a unit surface, (normal to the incident rays) at a distance from the centre of the sun is:
Q10easymcqPhysicsPhysics
0% accuracy
A black body is at . It emits energy at a rate that is proportional to:
Q11easymcqPhysicsPhysics
Assertion: A body that is a good radiator is also a good absorber of radiation at a given wavelength.Reason: According to Kirchhoff's law the absorptivity of a body is equal to its emissivity at a given wavelength.
Q12mediummcqPhysicsPhysics
A black body at radiates heat at the rate of . At a temperature of , the rate of heat radiated in the same units will be:
Q13easymcqPhysicsPhysics
The total radiant energy per unit area, normal to the direction of incidence, received at a distance from the centre of a star of radius , whose outer surface radiates as a black body at a temperature is given by:
Q14easymcqPhysicsPhysics
If the radius of a star is and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is ?
Q15easymcqPhysicsPhysics
A piece of iron is heated in a flame. It first becomes dull red, then reddish yellow, and finally turns white hot. The correct explanation for this observation is possible using:

Frequently Asked Questions

How many Radiation questions are on ExamTest.live?โ–ผ
We have 15 Radiation questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.
Are Radiation MCQs free?โ–ผ
Yes. All Radiation questions, answers, and explanations on ExamTest.live are completely free. No account or subscription required.
Which exams include Radiation questions?โ–ผ
Radiation questions are commonly asked in Physics, General Science, General Studies. You can filter by exam using the links above.
How do I practice Radiation questions effectively?โ–ผ
Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.