The temperature of a metal block is increased from 27⁰C to 84⁰C. The rate of radiated energy

⇦

⇨

The temperature of a metal block is increased from 27⁰C to 84⁰C. The rate of radiated energy from the block will increase approximately

Options

(a) 2 times
(b) 4 times
(c) 8 times
(d) 16 times

Correct Answer:

2 times

Explanation:

By Stefan’s law, E₂/E₁ = [(273 + 84)/(273 + 27)]⁴
⇒ E₁/E₁ = (357/300)⁴ = (119/100)⁴
⇒ E₁/E₁ = (1.19)⁴ ≈ 2.

Related Questions:

1. Work of 3.0×10⁻⁴ joule is required to be done in increasing the size of a soap film
2. A body cools in 7 minute from 60⁰C to 40⁰C. What time, in minute does it take to cool
3. The charge flowing through a resistance R varies with time t as Q=at-bt²,
4. The total energy of an electron in the first excited state of hydrogen atom
5. If the terminal speed of a sphere of gold (density=19.5 kg/m³) is 0.2 m/s

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