Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
9th Class Physics Chapter 6 Online Preparation
9th Class English Medium Subjects
9th Class Urdu Medium Subjects
Online Short Questions For Chapter 6 "9th Class Physics English Medium Chapter 6 Preparation "
Try The Short Questions For 9th Class Physics English Medium Chapter 6 Preparation
-
Total Questions10
-
Available Sets11
Physics (New Book) - 9th Class Physics English Medium Chapter 6 Preparation
Question # 1
When does a force work
- Ans 1: In physics, work is done when a force acts on a body and moves it in the direction of the force
- Ans 2: Explain: According to formula the work will be zero and IF work will also zero
Prepare Complete Set Wise Questions For Chapter 6 "9th Class Physics English Medium Chapter 6 Preparation "
9th Class Physics English Medium Chapter 6 Preparation - Set 1
Question # 1
When does a force work
- Ans 1: In physics, work is done when a force acts on a body and moves it in the direction of the force
- Ans 2: Explain: According to formula the work will be zero and IF work will also zero
9th Class Physics English Medium Chapter 6 Preparation - Set 2
Question # 1
What is soil erosion
- Ans 1: As the rain water flows down its kinetic energy changes into thermal energy while parts of the kinetic energy of following water is used to wash away soil particles of rocks known as soil erosion.
9th Class Physics English Medium Chapter 6 Preparation - Set 3
Question # 1
Define work. What is its SI unit.
- Ans 1: Work: work is done when a force acting on a body displaces it in the direction it in the direction of force. W = Force x displacement w= F.S Unit: Its unit is newton meter or joule.
9th Class Physics English Medium Chapter 6 Preparation - Set 4
Question # 1
Write uses of energy, pollute our environment?
-
Ans 1: Burning of fuel and solid wastes in homes, automobiles and factories release harmful amounts of air pollutants2- Nuclear power plants do not produce carbon dioxide, but they produce dangerous radioactive waste
9th Class Physics English Medium Chapter 6 Preparation - Set 5
Question # 1
Define elastic potential energy
- Ans 1: The energy possessed due to stretched position in a body is called elastic potential energy. It is stored potential energy in compressed spring
9th Class Physics English Medium Chapter 6 Preparation - Set 6
Question # 1
Write the mass energy equation and value of speed of light
- Ans 1: Mass Energy Equation: The Einstein's mass-energy equation states that mass and energy are interconvertible to each other
- Ans 2: Equation: E=mc
9th Class Physics English Medium Chapter 6 Preparation - Set 7
Question # 1
Write brief note on Einstein mass energy equation
-
Ans 1: Einstein predicted the interconversion of matter and energy. According to him, a loss in the mass of a body provides a lot of energy This happen in the nuclear reaction The reaction between the mass m and energy E is given by Einstein's mass energy equationThe above equation shows that tremendous amount of energy can be obtained from small quantity of matter It happens that matter is a highly concentrated form of energy
9th Class Physics English Medium Chapter 6 Preparation - Set 8
Question # 1
When does a force work
- Ans 1: In physics, work is done when a force acts on a body and moves it in the direction of the force
- Ans 2: Explain: According to formula the work will be zero and IF work will also zero
9th Class Physics English Medium Chapter 6 Preparation - Set 9
Question # 1
What is meant by chemical energy
- Ans 1: Chemical Energy: The energy released from substances during chemical reactions is called chemical energy
-
Ans 2: Sources of chemical energy: Energy of wood and coal from burningChemical is found in food and fuels.
9th Class Physics English Medium Chapter 6 Preparation - Set 10
Question # 1
What is meant by efficiency of a system?
- Ans 1: Efficiency of a system is the ratio of required form of energy obtained from a system as output to the total energy given to it as input. Formula: Efficiency = Required form of output/total input energy
9th Class Physics English Medium Chapter 6 Preparation - Set 11
Question # 1
To construct such a working system whose efficiency is 100% is impossible Why
- Ans 1: To construct such a working system, whose efficiency is 100% is impossible because every system meets energy losses due to friction that causes heat, noise etc These are not the useful form of energyh and go waste.
