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Questions and Answers
Which system of units uses centimeter, gram, and second as its fundamental units?
What is the fundamental unit of length in the F.P.S system?
Which term refers to units derived from fundamental units?
What does 'SI' stand for in the context of measurement systems?
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Which of the following is NOT a rule for writing SI units?
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In which system of units are the fundamental units known as gravitational units?
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What prefixes are used in the S.I units for convenience?
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Which of the following correctly describes the fundamental units of the M.K.S system?
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What is the primary focus of nanotechnology?
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What does kinematics study?
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Which branch of mechanics deals with forces acting on a body that is in motion?
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What distinguishes fundamental units from derived units in physics?
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Which of the following is a characteristic of statics in mechanics?
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Which category of mechanics is primarily concerned with the forces acting on deformable bodies?
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What does kinetics examine in mechanics?
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Which of the following concepts is NOT associated with dynamics?
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What does applied physics primarily focus on?
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Which branch of applied physics deals specifically with the properties of solid and liquid matter?
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In which field is optics primarily applied?
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What area does thermal physics encompass?
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Which branch of physics combines principles of biology and physics?
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What does the field of acoustics primarily study?
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What is a significant application of plasma physics?
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Which of the following branches primarily uses numerical methods and simulations?
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Study Notes
Applied Physics
- Applied physics focuses on practical applications of physical principles and theories to solve real-world problems and develop technologies.
- It bridges the gap between pure physics and engineering by emphasizing experimental techniques and the development of new materials, devices, and systems.
Branches of Applied Physics
- Mechanics: Studies forces and motion, influencing engineering, robotics, aerospace, and other fields.
- Condensed Matter Physics: Investigates properties of solids and liquids, impacting materials science, nanotechnology, and semiconductor physics.
- Optics: Studies light and its interactions with matter, leading to applications in lenses, lasers, and imaging technologies.
- Thermal Physics: Focuses on heat transfer, thermodynamics, and statistical mechanics, impacting engineering fields like HVAC and energy systems.
- Acoustics: Studies sound and its propagation, leading to applications in audio technology, noise control, and architectural design.
- Medical Physics: Applies physics concepts to medicine, including the development of imaging technologies (like MRI and X-ray) and radiation therapy for cancer treatment.
- Computational Physics: Employs numerical methods and simulations to solve complex physical problems, widely applied in research and engineering.
- Plasma Physics: Studies ionized gases and their applications in nuclear fusion, space physics, and technologies like plasma displays.
- Biophysics: Combines physics and biology to understand biological systems, contributing to medical technologies and biomaterials.
- Nanotechnology: Focuses on manipulating matter at the nanoscale, impacting materials science, electronics, and drug delivery systems.
Theory of Mechanics
- Theory of Machines is a branch of engineering-science that studies the relative motion between components of a machine and the forces acting on them.
Branches of Mechanics
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By type of body:
- Rigid Body Mechanics: Deals with bodies that do not deform under applied forces.
- Deformable Body Mechanics: Studies bodies that deform under applied forces.
- Fluid Mechanics: Focuses on the behavior of fluids (liquids and gases).
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By motion of body:
- Statics: Deals with forces and their effects on bodies at rest.
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Dynamics: Deals with forces and their effects on bodies in motion.
- Kinematics: Studies the motion of objects without considering the forces causing the motion.
- Kinetics: Focuses on the forces that cause motion and the relationships between motion and forces.
Units
- Units in physics are standard measures for quantities.
- Fundamental Units: Internationally accepted units for fundamental physical quantities (e.g., meter, kilogram, second). Also known as SI Units.
- Derived Units: Units derived from fundamental units (e.g., area, speed, volume).
System of Units
- A system of units is a set of related units used for calculations. It includes base units (representing base dimensions) and derived units (representing products of powers of base dimensions).
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Classification:
- C.G.S System: Centimeter, gram, second. Known as absolute units.
- F.P.S System: Foot, pound, second.
- M.K.S System: Meter, kilogram, second. Known as gravitational units.
- S.I System: International System of Units.
S.I System of Units
- It uses prefixes to represent convenient units for very small or large measurements.
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Prefix List:
- Yotta (Y): 10^24
- Zetta (Z): 10^21
- Exa (E): 10^18
- Peta (P): 10^15
- Tera (T): 10^12
- Giga (G): 10^9
- Mega (M): 10^6
- Kilo (k): 10^3
- Hecto (h): 10^2
- Deka (da): 10^1
- Deci (d): 10^-1
- Centi (c): 10^-2
- Milli (m): 10^-3
- Micro (µ): 10^-6
- Nano (n): 10^-9
- Pico (p): 10^-12
- Femto (f): 10^-15
- Atto (a): 10^-18
- Zepto (z): 10^-21
- Yocto (y): 10^-24
Rules of SI Units
- A dash separates units that multiply each other (e.g., N-m for newton meter).
- Plurals are not used in symbols (e.g., m for meter).
- All units are written in lowercase letters unless they start with a scientist's name (e.g., N for newton, W for watt).
- Units starting with a scientist's name are not capitalized when using the full form.
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Description
Explore the various branches of applied physics, including mechanics, condensed matter physics, optics, thermal physics, and acoustics. This quiz highlights how these fields impact engineering, technology, and real-world problem-solving. Assess your understanding of the practical applications of physical principles.
