11Th Physics Important Five Marks | Online Guide

Important five marks chapter wise

Ln1:

1. Explain the use of screw gauge and vernier caliper in measuring smaller distances.(Pg No 12)
2. Determination of distance of Moon from Earth?14
3. Explain triangulation method and radar method to measure larger distances. (Pg-13,15)
4. Explain in detail the various types of errors. (Pg-20)
5. What do you mean by propagation of errors? Explain the propagation of errors in addition,differnce, Product & Quotient. (Pg-23,24)
6. Obtain an expression for the time period T of a simple pendulum. The time period T depends on (i) mass ‘m’ of the bob (ii) length ‘l’ of the pendulum and (iii) acceleration due to gravity g at the place where the pendulum is suspended.(Pg.No – 34)
7. Explain absolute error,Mean absolute error,Relative error?22
8. Rules for rounding off?28

Ln2:

1. Triangle law of addition?47
2. Explain Scalar product of two vectors?Pg No 53
3. Explain vector product of two vectorsPg No 55
4. Equation of uniformly accelerated motion?Pg No 76
5. Derive the equations of motion for a particle
6. a) falling vertically b) projected vertically.Pg No 77,78,80
7. Projectile in horizontal projection 81
8. Projectile under an angular projection.84
9. Derive the expression for centripetal acceleration? Pg No -91,92
10. Derive the kinematic equations of motion for constant acceleration?

Ln3:

1. Explain the motion of two bodies in contact on a horizontal surface? Pg No -124,125
2. Prove the law of conservation of linear momentum. Use it to find the recoil velocity of a gun when a bullet is fired from it. Pg No-130,131,132 (Very Important)
3. Explain the motion of blocks connected by a string in i) Vertical motion ii) Horizontal motion. (Pg-126-128)
4. Briefly explain the origin of friction. Show that in an inclined plane, angle of friction is equal to angle of repose. (Pg-136,142)
5. Push or pull which is easier.140
6. Explain the need for banking of tracks.(Very Important) Pg-152
7. Explain particle moving in an inclined plane find i) acceleration ii) speed of the sliding object using free body diagram?(Pg-122,123
8. Vehicle on a leveled circular road. (Very Important)Pg No 150
9. Centripetal and centrifugal force. (Very Important)Pg No 156
10. Explain Newton’s laws of motion?

Ln4:

1. Work done by constant force?Pg No 168
2. State and explain work-energy theorem. Pg No 174,175
3. What is inelastic collision? Derive the expression for loss of kinetic energy in perfect inelastic collision. Pg No -193,198-200
4. Explain elastic potential energy with spring mass system? Pg No 178,179
5. Arrive at an expression for elastic collision in one dimension and discuss various cases.Very Important Pg No -194
6. Derive an expression for the velocity of the body moving in a circle and also find a tension at the bottom and the top of the circle. Pg No-187-190
7. Relation between power and velocity?Pg No 192
8. Loss of kinetic energy in perfect inelastic collision.Pg No 199

Ln5:

1. Moment of inertia of a rod? Pg No 234
2. Moment of inertia of a disc? Pg No 235
3. Moment of inertia of a ring ?236
4. Parallel axis theorem?Pg No 239
5. Perpendicular axis theorem? Pg No 240
6. Explain the Types of equilibrium?Pg No 228
7. Bending of cyclist in curves. Pg No 232

Ln6:

1. Derive the expression for gravitational potential energy. (Pg-13)
2. gravitational potential energy near the surface of the earth?
3. Explain the variation of g with latitude, altitude, depth from the Earth’s surface. (Pg-19-21)
4. Derive an expression for escape speed. (Pg-22)
5. Derive the time period of satellite orbiting the Earth. (Pg-24)
6. Derive an expression for energy of satellite. (Pg-25)
7. Discuss the apparent weight of man standing inside the elevators. (Pg-28)

Ln7:

1. State Hooke’s law and verify it with the help of an experiment. (Pg-54)
2. Derive an expression for the elastic energy stored per unit volume of a wire. (Pg-59)
3. Derive the expression for the terminal velocity of a sphere moving in a high viscous fluid using stokes force. (Pg-69)
4. Derive Poiseuille’s formula for the volume of a liquid flowing per second through a pipe under streamlined flow. (Pg-70)
5. What is capillarity? Obtain an expression for the surface tension of a liquid by capillary rise method. (Pg-80)
6. State and prove Bernoulli’s theorem for a flow of incompressible, non-viscous, and streamlined flow of fluid. (Pg-83)
7. Explain the different types of modulus of elasticity?

Ln8:

1. Explain Calorimetry?. (Pg-106) 
2. Explain in detail Newton’s law of cooling. (Pg-109)
3. Derive the work done in an isothermal process. (Pg-126)
4. Derive the work done in an adiabatic process. (Pg-130)
5. Explain in detail Carnot heat engine. (Pg-144)
6. Explain carnot cyle?
7. Meyers relation ? Pg 124

Ln9:

1. Derive the expression of pressure exerted by the gas on the walls of the container. (Pg-165)
2. Describe the total degrees of freedom for monoatomic molecule, diatomic molecule and triatomic molecule. (Pg-174)
3. Derive the expression for mean free path of the gas. (Pg-177)

Ln10:

1. Oscillations of a simple pendulum in SHM and laws of simple pendulum (Pg-207)
2. Describe the vertical oscillations of a spring. (Pg-201)
3. ENERGY IN SIMPLE HARMONIC MOTION. (Pg-210)
4. Horizontal oscillations of a spring-mass system. (Pg-200)
5. Springs connected in series (Pg- 203)
6. Springs connected in parallel (Pg-205)
7. Write short notes on the oscillations of liquid column in U-tube. (Pg-210)

Ln11 :

1. Newton’s formula & Laplace’s correction (Pg : 236)
2. Vibrations of air column (Closed & Open Organ Pipe)(Pg : 261)

🎯 Why Focus on five-Mark Questions in 11th Physics?
Two-mark questions are direct, scoring, and test fundamental understanding of physics concepts. Answering them correctly can boost your overall marks significantly.

📚 Types of 5-Mark Questions in Physics:
🔹 Definition-Based Questions – Laws, Theorems & Principles
🔹 Formula-Based Questions – Key Equations & SI Units
🔹 Conceptual Questions – Short Explanations of Physical Phenomena
🔹 Diagram-Based Questions – Ray Diagrams, Graphs & Circuit Symbols

📢 More 11th Physics Exam Resources:
📘 11th Physics Formula Sheet & Theorems
📗 11th Physics Public Exam Answer Keys
📚 11th Physics Blueprint & Marking Scheme

📢 External References for 11th Physics Preparation:
🔗 Tamil Nadu 11th Public Exam Timetable 2025 – DGE TN
🔗 11th Physics Online Textbook – TN SCERT

🚀 Prepare Smart & Score High! Visit Padidaa.com for 11th Physics Study Materials, Public Exam Guides, and Expert Video Lessons. 📚