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What is a generator? What is the function of a generator?

What is a generator? What is the function of a generator? A generator is a power generating device with which kinetic energy is converted to electrical energy. The making of a generator is based on the principle of electromagnetic induction. Most of the electricity we use in our homes is produced by generators. Inside a generator, coils of wire are rotated between the poles of a magnet. As the coils rotate, they cut through magnetic field lines generating current.

Physics to Save Life

Physics to Save Life Learning Outcome Basis of bio-physics. Contribution of Jagdish Chandra Bose in bio-physics. Applications of ideas and theories of physics in the instruments for diagnosis of diseases in medical science. Hazards of using modern technology and devices and mechanism of prevention. Necessity of diagnosis for proper treatment and raise consciousness among others. Contribution of science and technology for diagnosis of diseases. Explain the human body that runs following the rules of physics. Physics Table of contents Physical Quantities and Their Measurements Motion Force Work, Power, and Energy State of Matter and Pressure Effect of Heat on Matter Waves and Sound Reflection of Light Refraction of Light Static Electricity Current Electricity Magnetic Effects of Current Modern Physics and Electronics Physics to Save Life

Modern Physics and Electronics

Moden Physics and Electronics Learning Outcome Relation between work and energy. Physics Table of contents Physical Quantities and Their Measurements Motion Force Work, Power, and Energy State of Matter and Pressure Effect of Heat on Matter Waves and Sound Reflection of Light Refraction of Light Static Electricity Current Electricity Magnetic Effects of Current Modern Physics and Electronics Physics to Save Life

Magnetic Effects of Current

Magnetic Effects of Current Learning Outcome Relation between work and energy. Necessary Equations No.  Information  Unit  1    2  3  4     Physics Table of contents Physical Quantities and Their Measurements Motion Force Work, Power, and Energy State of Matter and Pressure Effect of Heat on Matter Waves and Sound Reflection of Light Refraction of Light Static Electricity Current Electricity Magnetic Effects of Current Modern Physics and Electronics Physics to Save Life

Current Electricity

Current Electricity Learning Outcome Relation between work and energy. Necessary Equations No.  Information  Unit  1    2  3  4     Physics Table of contents Physical Quantities and Their Measurements Motion Force Work, Power, and Energy State of Matter and Pressure Effect of Heat on Matter Waves and Sound Reflection of Light Refraction of Light Static Electricity Current Electricity Magnetic Effects of Current Modern Physics and Electronics Physics to Save Life

Static Electricity

Static Electricity Learning Outcome Relation between work and energy. Necessary Equations No.  Information  Unit  1    2  3  4     Physics Table of contents Physical Quantities and Their Measurements Motion Force Work, Power, and Energy State of Matter and Pressure Effect of Heat on Matter Waves and Sound Reflection of Light Refraction of Light Static Electricity Current Electricity Magnetic Effects of Current Modern Physics and Electronics Physics to Save Life

Reflection of Light

Reflection of Light Learning Outcome Relation between work and energy. Necessary Equations No.  Information  Unit  1    2  3  4     Physics Table of contents Physical Quantities and Their Measurements Motion Force Work, Power, and Energy State of Matter and Pressure Effect of Heat on Matter Waves and Sound Reflection of Light Refraction of Light Static Electricity Current Electricity Magnetic Effects of Current Modern Physics and Electronics Physics to Save Life

Waves and Sound

Waves and Sound Learning Outcome Relation between work and energy. Necessary Equations No.  Information  Unit  1    2  3  4     Physics Table of contents Physical Quantities and Their Measurements Motion Force Work, Power, and Energy State of Matter and Pressure Effect of Heat on Matter Waves and Sound Reflection of Light Refraction of Light Static Electricity Current Electricity Magnetic Effects of Current Modern Physics and Electronics Physics to Save Life

Effect of Heat on Matter

Effect of Matter on Matter Learning Outcome Relation between work and energy.

State of Matter and Pressure

State of Matter and Pressure Learning Outcome Relation between work and energy. 5.1 Pressure 5.2 Density 5.3 Pressure in liquids 5.4 Air Pressure 5.5 Elasticity 5.6 Three States of Matter: Solid, Liquid and Gas Necessary Equations No.  Information  Unit  1    2  3  4     Physics Table of contents Physical Quantities and Their Measurements Motion Force Work, Power, and Energy State of Matter and Pressure Effect of Heat on Matter Waves and Sound Reflection of Light Refraction of Light Static Electricity Current Electricity Magnetic Effects of Current Modern Physics and Electronics Physics to Save Life

Work, Power and Energy

Work, Power, and Energy Learning Outcome Relation between work and energy. Relation among work, force, and displacement. Kinetic and potential energy. Transformation of energy in its source. Contribution of the sources of energy regarding economic, social, and environmental influence. Relation between transformation of energy and conservation of energy. Transformation of energy and how its uses hamper the balance of environment. Effective use of energy in developing activities. Effective and safe use of energy. Mass energy relation. Explain the power. Measure the efficiency. 4.1 Work What is work? If because of force-displacement happens then the product of force and component of displacement at the direction of force due to force is work. Work is the product of applied force on a body and its displacement along the direction of force. Unit of work: J (Joule) Dimension of work, [W] = ML2T-2 What is Joule? If due to the appliance of one newton force at the direction of force the applica

Force

 Motion Learning Outcome Inertia of an object and qualitative concept of force applying Newton's first law of motion. Nature of different types of forces. Influence of balanced and unbalanced forces. Momentum of objects. Influence of force on motion. Measure the force by applying Newton's second law of motion. Action and reaction force by applying Newton's third law of motion. Influence of motion and force on safe travelling. Conservation of law of momentum and collision. Different types of friction and frictional forces. Influence of friction on the motion of an object. Means to increase or decrease friction. Positive impact of friction in our daily life. Gravitational force. 3.1 Inertia and Concept of Force - Newton's First Law 3.2 Nature of Fundamental Forces 3.3 Balanced and Unbalanced Forces 3.4 Momentum 3.5 Collision 3.6 Effect of Force on Motion: Newton's Second Law 3.7 Gravitational Force 3.8 Newton's Third Law 3.9 Frictional Force Necessary Equations No

Motion

Motion Learning Outcome Rest and Motion Difference among different types of motion. Scalar and vector quantities. Relation among the quantities regarding motion. Motion of freely falling quantities regarding motion with the help of graph. Effective of motion in our life. Rest and Motion What is rest? What is motion? What is a position? What is a reference point? What do you understand by reference frame? No rest or no motion is absolute - Explain. Different Types of Motion What is linear motion? What is Circular motion? What is translational motion? What is periodic motion? What is simple harmonic motion? Scalar and Vector Quantities Distance and Displacement Speed and Velocity Acceleration and Deceleration or Retardation Equations of Motion Laws of Falling Bodies Necessary Equations No. Equation   Information   Unit  1      2    3    4       Mathematical Problems The veloci

Physical Quantities and Their Measurements

Physical Quantities and Their Measurements Learning Outcome The scope and gradual development of physics. The objectives of physics. The physical quantities as the origin of physics.  The measurement and necessity of units. The difference between fundamental and derived quantities. Physics The branch of science which deals with matter and energy is called physics. The main objectives of physics are to establish the relation between matter and energy and to express it quantitatively on the basis of observation, experimentation, and analysis. Scope of Physics Physics is the key to all science. It is the fundamental branch of science because the foundation of other subjects is based on the principles of physics. For example, the principle of conservation of energy is a basic principle of physics used to explain the wide range of science starting from the structure of atoms to weather forecasting. Starting from Engineering to Medical Science, Astronomy to Oceanology, Biology to Psychology

Refraction of Light

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Refraction of Light By the end of this chapter, we will be able to - 1. Explain the laws of refraction 2. Explain the refractive index 3. Explain the total internal reflection 4. Explain the use of optical fiber 5. Explain the lens and its classification 6. Describe the different quantities of lens by drawing ray diagram 7. Describe the image formed by the lens by drawing ray diagram 8. Describe the power of lens 9. Describe the function of eyes by drawing ray diagram 10. Describe least distance of distinct vision 11. Describe the defects of eyes 12. Describe the uses of lens to remedy the defects of eye by drawing ray diagram 13. Explain the perception of coloured objects 14. Describe the uses of refraction of light in our everyday life Refraction of light Look at figure 9.1. here two media, air and glass are shown. Coming from air medium following the path AB, light ray incidents at point B of the separation surface PQ of two media. If the light ray goes straight it will follow the p

How to reduce friction?

How to reduce friction? Friction can be reduced in this way: By smoothing the surface. Using greasy materials. Using ball-bearing.

What is fundamental force? Gravitational force, Electromagnetic force, Weak nuclear forces and Strong nuclear force

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What is fundamental force? Those forces which are fundamental or independent meaning those forces which do not derive from other forces rather other forces are one type or another expression of them are fundamental forces. The four fundamental forces are: Gravitational force Electromagnetic force Weak nuclear forces and Strong nuclear force. Gravitational force The attraction force working between any two objects of the universe is the gravitational force. This attraction happens because of the mass. Among four fundamental forces, gravitational force is comparatively weaker. Electromagnetic force Two charged particles, because of their charge applies force on another which is called electromagnetic force. Weak nuclear force That short-ranged and weak force that works among the particles inside of a nuclear is weak nuclear force. Because of this force, instability occurs in the nucleus and Beta decay happens. Most  Strong nuclear force The strong force that works between two nucleons is

What is inertia of motion?

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  What is inertia of motion? The characteristics that a body in motion wants to keep its motion in uniform velocity, is called inertia of motion .

What is inertia of rest?

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What is inertia of rest? The characteristics that a stationary body wants to be stationary is called inertia of rest .

What do you mean by the law of conservation of momentum?

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What do you mean by the law of conservation of momentum? If no force other than action and reaction forces act on two or more objects, no change takes place in their sum momentums in the opposite direction. For example, the momentum of two cars are the same before and after a collision. If F 1  and F 2  stand for action and reaction forces, the law of conservation of momentum states that F 1  = F 2 . m 1 u 1 +m 2 u 2 =m 1 v 1 +m 2 v 2 Here, m 1  = mass of the first object m 2  = mass of the second object u 1  = initial velocity of the first object u 2  = initial velocity of the second object v 1  = final velocity of the first object v 2  = final velocity of the second object

About Me





Md. Saifur Rahman


B.Sc (Honors), M.Sc (Chemistry)

Former Principal of South Point School and College, Dinajpur.

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