A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature

⇦

⇨

A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature of 727⁰C, the rate of heat radiated in the same units will be:

Options

(a) 50
(b) 112
(c) 80
(d) 60

Correct Answer:

112

Explanation:

According to Stefan’s law, E ∞ σT⁴, T₁ = 500 K T₂ = 1000 K
E₂ / E₁ = (T₂ / T₁)⁴ = (1000 / 500)⁴ = 16
E₂ = 16 x 7 = 112 cal/ cm²s

Related Questions:

1. Function of a rectifier is
2. The body of mass m hangs at one end of a string of length l, the other end of which
3. The binding energy of deutron is 2.2 MeV and that of ₂⁴He is 28 MeV.
4. A sample of radioactive element has a mass of 10 gram at an instant t=0.
5. MA⁻¹T⁻² is the dimensional formula of

Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends