# 9th Class Guess Paper on Physics (Annual Exam 2020)

9th Class Guess Paper on Physics (Annual Exam 2020). Solved Important Questions for Islamabad Model Schools & Colleges / Federal Board (FBISE) Islamabad. The students of Islamabad Capital Territory (ICT) studying in Islamabad Model Schools & Colleges (ICB, ICG, IMCB, IMCG) can utilize our guess papers with full trust & confidence. These guess papers (Important Questions) are guarantee to get good marks in your annual exams. These guess papers can also be utilized by the students of other boards & schools/colleges of Punjab Province who are studying the same syllabus & course. These papers are prepared as per latest scheme of studies prescribed by Federal Board of Intermediate & Secondary Education, Islamabad (FBISE) and Federal Directorate of Education (FDE), Islamabad having studied all the past papers and through the experience gained from these papers.

## 9th Class Guess Paper on Physics (Annual Exam 2020):

Important Short Questions:

• What is meant by Vernier Constant or Least Count?
• What is the use of Zero Error?. Why it is necessary in a measuring instrument?
• Define significant figures.
• What is Andromeda?
• Describe Lord Kelvin Statement.
• Define Unit. Write units of System International.
• Define prefixes?
• What is Hubble space telescope?
• Differentiate between Scalar and Vector quantities.
• Differentiate between Distance and Displacement.
• Differentiate between Speed and Velocity.
• Differentiate between Linear and Random motion.
• What is Gyration Length?
• Define Kinematics.
• What change will occur in equation of motions under gravity?
• Define Inertia.
• Define Centripetal force?
• Differentiate between Mass and Weight.
• Differentiate between Sliding and Rolling Friction.
• Why it is dangerous to travel on the roof of a bus?
• Why does a passenger move outward when a bus takes a turn?
• If action and reaction are always equal and opposite, then how does a body moves?
• A horse pushes the cart. If action and reaction are always equal and opposite, then how does a cart move?
• Define the law of conversation of momentum. Why it is important?
• When a gun is fired, it recoils. Why?
• Write two situations in which force of friction is needed.
• Describe ways to reduce friction.
• Why the outer edge of the road is kept higher (Banking of Road)?
• On what principal cream separator works? / How does cream separator works?
• Define dynamics.
• A bullet has a very small inertia due to its small mass? But why does it impact is so strong when it is fired from the gun?
• What is Atwood Machine?
• Why fragile objects are packed with suitable materials?
• Define system and isolated system.
• What is co-efficient of friction?
• Why Ball bearings are used to reduce friction?
• Describe the advantages of friction.
• Define Torque.
• Define Center of Gravity.
• Differentiate between torque and couple.
• Differentiate between stable and neutral equilibrium.
• When a body is said to be in equilibrium?
• Give an example of moving body which is in equilibrium?
• Think of a body which is in rest but not in equilibrium.
• Why the height of vehicles is kept as low as possible?
• Women and children in the villages often carry pitchers on their heads. How this is possible?
• What is trigonometry?
• What is rigid body?
• What is axis of rotation?
• Define moment arm.
• Define center of gravity.
• How does a paratrooper come down?
• Define terminal velocity
• Why a vehicle is made heavy at its bottom?
• What is force of gravitation.
• Define gravitational field.
• What is global positioning system (GPS)?
• Why does value of “g” vary from place to place?
• On what factors orbital speed of a satellite depends?
• Why communication satellite are stationed at geostationary orbit?
• Define work. What is its SI unit?
• What is Pole Vaulter?
• Explain mass energy equation. E=mc2
• Define ideal system / machine.
• When does a force do work. Explain?
• Which form of energy is most preferred and why?
• Define power.
• Define Watt.
• What is Hydrometer?
• What is meant by deforming force?
• Differentiate between stress and strain?
• State Pascal’s law.
• What is Hook’s law. What is meant by elastic limit.
• Define Archimedes principal.
• Define thermal conduct and thermal equilibrium.
• Define energy in transit and internal energy.
• Define heat capacity.
• Define thermal expansion.
• Why gaps are left in railway tracks?
• Why gaps are left in bridges with rollers?
• Why overhead transmission lines are also given a certain amount of sag?
• What is the use of bimetallic strip in thermostats?
• What is anomalous expansion of water?
• Explain volumetric thermal expansion.
• Define specific heat
• Define latent heat of fusion.
• Define latest heat of vaporization

Important Long Questions:

• Define Translatory motion and explain its types.
• Derive Newton’s First Equation of Motion.
• Derive Newton’s Second Equation of Motion.
• Derive Newton’s Third Equation of Motion.
• Explain Newton’s first law of motion with examples.
• Explain Newtons second law of motion with examples. Prove F = ma.
• Explain Newtons third law of motion with examples.
• Explain first condition of equilibrium
• Explain second condition of equilibrium
• Describe the types of equilibrium.
• Perform an experiment to find out the center of body of an irregular body.
• What are geo-stationary satellites. What are their uses?
• Define and explain Law of gravitation. Also derive the mass of earth with the help of this law.
• Define Kinetic Energy. Also derive the relation for K.E?
• What do you know about Youn’g modulus of an object? How would you determine it?
• Define and explain Archimedes principal.
• Explain the working of Hydraulic Press.
• What is upthrust? Explain. What is principal of flotation.
• Describe importance of large specific heat capacity of water.
• Derive the relation of Linear thermal expansion in solids.

Other Important Things:

• Objectives
• Numericals
• Diagrams