MOST IMPORTANT QUESTION OF PHYSICS FOR CLASS 12

THESE ARE THE MOST IMPORTANT QUESTIONS FOR CLASS 12 AND I HOPE MANY WILL BE IN EXAMS....

THESE ARE 5 MARKS QUESTIONS..   

1. Derive an expression for the Electric field at a point on the (i) axial line and (ii) equatorial line of an electric dipole
2. Describe the principle construction and working of Van de Graff Generator.
3. State Gauss’ theorem and apply it to find the electric field at a point due to
   1. A point charge
   2. A line of charge
   3. A plane sheet of charge
   4. A charged spherical conducting shell
4. Derive expression for the potential energy of a system of point charges.
5. Derive expression for the torque on a dipole in a uniform electric field.
6. Derive expression for the work done in turning a dipole in a uniform electric field.
7. Derive an expression for the potential energy of a dipole in a uniform electric field.
8. Explain the principle of a parallel plate capacitor
9. Derive an expression for the capacitance of a parallel plate capacitor.

10.  Derive an expression for the effective capacit

CLASS XI PHYSICS IMPORTANT QUESTIONS

CLASS XI PHYSICS IMPORTANT QUESTIONS

3 MARKS:
1) DISTINGUISH BETWEEN FUNDAMENTAL UNITS AND DERIVED UNITS.
2) WHAT ARE THE TWO TYPES OF COLLISION? EXPLAIN THEM.
3) STATE NEWTONS FIRST LAW OF MOTION.
4) TWO EQUAL FORCES ARE ACTING AT A PIONT WITH AN ANGLE OF 60 BETWEEN THEM. IF THE RESULTANT FORCE IS EQUAL TO 20√3N. FIND THE MAGNITUDE OF EACH FORCE.
5) WHAT ARE THE DIFFERENT TYPES OF EQUILIBIRIUM.
6) STATE THE UNIVERSAL LAW OF GRAVITATION.
7) DEFINE GRAVITATIONAL POTENTIAL.
8) WHAT IS REYNOLD’S NUMBER?
9) WHAT IS SURFACE TENTION?
10) DEFINE SIMPLE HARMONIC MOTION.

Must Practice Questions for CBSE Physics CLASS 12 with Solution

ELECTROSTATICS

CURRENT ELECTRICITY

MAGNETIC EFFECTS OF CURRENT

ELECTROMAGNETIC INDUCTION

ALTERNATING CURRENT

ELECTROMAGNETIC WAVES

OPTICS

IMPORTANT TRIGONOMETRIC IDENTITIES AND FORMULAE

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CBSE Class XI : Selected Questions for practice and quick revision

CBSE Class XI : Selected Questions for practice and quick revision

1. State the principle of conservation of angular momentum and explain its applications.
2. Define radius of gyration
3. Establish equation of continuity of an ideal liquid flow
4. Explain the variation of acceleration due to gravity with (a) altitude (b) depth
5. State Kepler’s laws of planetary motion
6. Define escape velocity and derive an expression for the escape velocity of a body on the surface of earth.
7. State theorem of perpendicular axis and the theorem of parallel axes.
8. Show that the oscillations of a simple pendulum are simple harmonic.
9. What are beats? How are they produced?
10. What is Doppler Effect?
11. State Carnot’s theorem.

CHAPTERWISE REVISION QUESTIONS FOR CBSE CLASS XII

• Electrostatics
• ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT
• CURRENT ELECTRICITY
• EM WAVES DUAL NATURE ATOMS AND NUCLEI
• Ray Optics
• wave optics
• SEMICONDUCTOR DEVICES
• communication system

Random collection of Physics Viva Questions

1. State the Principle of a potentiometer. (The students say that potential drop is proportional to length but the constant quantities are not mentioned)
2. How can we increase the sensitivity of a potentiometer?
3. Define figure of merit of a galvanometer.
4. Which has more resistance – a galvanometer or a milliammeter?
5. How does an LED emit light?
6. What is the difference between an ordinary diode and an LED?
7. Define principal axis of a convex lens?
8. What happens to the focal length of a concave mirror if it is immersed in water?
9. What are the factors affecting the internal resistance of a cell?
10. What are the difference between primary and secondary cell?
11. Why can’t we use a dry cell for starting a car?
12. What happens to the resistivity of a wire when it is doublefolded?
13. How does the resistance of a wire depend on its dimensions?