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12th Class Physics
Short Questions Preparation
Start Chapter 21 Preparation
12th Class Physics Chapter Wise Preparation
Online Short Questions For Chapter 10 "ICS Part 2 Physics Chapter 21 Short Questions Preparation "
Try The Short Questions For ICS Part 2 Physics Chapter 21 Short Questions Preparation
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Total Questions10
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Available Sets5
Physics - ICS Part 2 Physics Chapter 21 Short Questions Preparation
Question # 1
Differentiate between controlled and uncontrolled reaction.
- Ans 1: To maintain a sustained controlled nuclear reaction,for every 2 or 3 neutrons released ,only one must be allowed to strike another uranium nucleus.it is called controlled chain reaction.
- Ans 2: If more than one neutron produces further fission then it will grow uncontrolled and called uncontrolled chain reaction.
ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 1
Question # 1
Differentiate between controlled and uncontrolled reaction.
- Ans 1: To maintain a sustained controlled nuclear reaction,for every 2 or 3 neutrons released ,only one must be allowed to strike another uranium nucleus.it is called controlled chain reaction.
- Ans 2: If more than one neutron produces further fission then it will grow uncontrolled and called uncontrolled chain reaction.
ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 2
Question # 1
What do you mean by critical mass and critical volume?
- Ans 1: The mass of uranium in which one neutron out of all neutron out of all neutron produced in one fission reaction produces further fission reaction is called critical mass.
ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 3
Question # 1
What is radioactivity decay?Give an example.
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Ans 1: The emission of radiations from elements having charge number Z greater than 82 is called radioactivity or radioactive decay.The emission of an a-particle from radium-226 ,result in the formation of radon gas.
ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 4
Question # 1
How can radioactivity help in the treatment of cancer?
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Ans 1: It helps in treatment of cancer:
- Cobalt-60 is used in radiotherapy.
- For skin cancer ,phosphorus -32 or strontium-9 is used.
- Radioactive iodine-131 is used to cure cancer of thyroid gland.
ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 5
Question # 1
Briefly describe the term radiography.
- Ans 1: The radiography is a technique used in medicine such as internal imaging of the brain to determine the size and location of the tumor precisely.
