| ⇦ | 
| ⇨ |
The power obtained in a reactor using U²³⁵ disintegration is 1000 kW. The mass decay of U²³⁵ per hour is
Options
(a) 10 microgram
(b) 20 microgram
(c) 40 microgram
(d) 1 microgram
Correct Answer:
40 microgram
Explanation:
E = mc² m = E / c² so, mass decay per second.
dm/ dt = 1/c² . dE/ dt = 1/c² (Power in watt)
= 1 / (3 x 10⁸)² x 1000 x 10³
and mass decay per hour = dm/ dt x 60 x 60
= 1 / (3 x 10⁸)² x 10⁶ x 3600 = 4 x 10⁻⁸ kg = 40 microgram
Related Questions: - Large transformers, when used for some time, become hot and are cooled by circulating
- Maximum velocity of the photoelectron emitted by a metal is 1.8×10⁶ ms⁻¹.
- Out of the following which pair of quantities does not have same dimensions?
- What is the wavelength of light for the least energetic photon emitted
- A light whose frequency is equal to 6.0 x 10¹⁴ Hz is incident on a metal
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Large transformers, when used for some time, become hot and are cooled by circulating
- Maximum velocity of the photoelectron emitted by a metal is 1.8×10⁶ ms⁻¹.
- Out of the following which pair of quantities does not have same dimensions?
- What is the wavelength of light for the least energetic photon emitted
- A light whose frequency is equal to 6.0 x 10¹⁴ Hz is incident on a metal
Topics: Atoms and Nuclei (136)
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
Leave a Reply