83 / 100

# Comprehensive Guide: Important Questions for CBSE Class 12 Physics

Hello friends how are you guys let’s tell important chapter wise .Welcome to our comprehensive guide on important questions for CBSE Class 12 Physics! In this guide, we have compiled a list of the most important questions for CBSE Class 12 Physics that are likely to appear in the upcoming board exams.

Our team of experts has carefully curated this list based on previous year question papers and the latest syllabus issued by the CBSE board. We understand that Physics can be a challenging subject, but with the right preparation and practice, you can excel in your exams.

## Why Are These Important Questions for CBSE Class 12 Physics?

The CBSE board exams for Class 12 Physics are designed to test your understanding of fundamental concepts, problem-solving abilities, and application of theoretical knowledge. The questions in the exams are based on the syllabus, and there are certain topics that are more important than others.

Our list of important questions for CBSE Class 12 Physics covers these crucial topics, and practicing these questions will help you gain confidence in your understanding of the subject. You will also get a better idea of the types of questions that may appear in the exam and can prepare accordingly.

physics important questions class 12 cbse board

## Important Questions for CBSE Class 12 Physics

The following is a list of important questions for CBSE Class 12 Physics that you should practice before your exams:

### Chapter 1: Electric Charges and Fields

• Derive an expression for the electric field due to a point charge.
• What is the principle of a Van de Graaff generator?
• What is an electric dipole? Derive the expression for the electric field on its axial line.
• Derive the expression for the electric field due to an electric dipole at any point on the equatorial plane.

### Chapter 2: Electrostatic Potential and Capacitance

• Derive an expression for the potential energy of an electric dipole in an electric field.
• What is the principle of a parallel plate capacitor?
• Derive the expression for the capacitance of a parallel plate capacitor.
• A capacitor is charged by a battery and then disconnected from it. What will happen to the electric field between the plates of the capacitor?

### Chapter 3: Current Electricity

• State Ohm’s law and define its limitations.
• Derive the expression for the resistivity of a material in terms of its parameters.
• What is a potentiometer? Derive the formula to calculate the potential gradient.
• Derive the expression for the equivalent resistance of three resistors in series and parallel.

### Chapter 4: Moving Charges and Magnetism

• Derive the expression for the force on a moving charge in a uniform magnetic field.
• State Fleming’s left-hand rule and right-hand rule.
• Derive the expression for the magnetic field due to a straight current-carrying conductor.
• Derive the expression for the magnetic field due to a circular current-carrying loop at its center.

### Chapter 5: Magnetism and Matter

• Define magnetic dipole moment and derive the expression for the torque on a magnetic dipole in a uniform magnetic field.
• What is meant by the term magnetic susceptibility?
• Define Curie’s law and explain its limitations.
• Derive the expression for the magnetic field inside a solenoid.

### Chapter 6: Electromagnetic Induction

• State Faraday’s law of electromagnetic induction.
• Derive the expression for the emf induced in a straight conductor moving in a magnetic field.
• What is Lenz’s law?
• State Fleming’s right-hand rule for the direction of the induced emf and current.

### Chapter 7: Alternating Current

• Define the term RMS
• What is an AC generator?
• Derive the expression for the emf of an AC generator.
• What is the difference between peak value, average value, and RMS value of an AC voltage?
• Derive the expression for the reactance of an inductor and a capacitor.

### Chapter 8: Electromagnetic Waves

• State the properties of electromagnetic waves.
• Derive the expression for the speed of an electromagnetic wave in free space.
• What is meant by the term electromagnetic spectrum?
• Derive the expression for the intensity of electromagnetic waves.

### Chapter 9: Ray Optics and Optical Instruments

• Derive the mirror formula and the lens formula.
• What is the magnification produced by a plane mirror?
• Define the term power of a lens. Derive the expression for the power of a lens.
• What is the difference between a telescope and a microscope?

### Chapter 10: Wave Optics

• Derive the expression for the angle of deviation for a prism.
• Define the term resolving power of an optical instrument.
• What is meant by the term interference of light?
• Derive the expression for the path difference for constructive and destructive interference.

physics important questions class 12 cbse board

## Conclusion

We hope our comprehensive guide on important questions for CBSE Class 12 Physics has been helpful to you. Practice these questions thoroughly to gain a better understanding of the subject and prepare yourself for the upcoming board exams.

Remember, a good understanding of fundamental concepts and regular practice are key to scoring well in Physics. We wish you all the best for your exams and hope you excel in them.

physics important questions class 12 cbse board