CBSE Class 12 Preparation Tips for Physics

Table of Content

• Weightage to Subject Units (Out of 70 Marks Total)

• Weightage to Form of Questions

• CBSE Class 12th Syllabus for Physics

• Important Questions For Class 12^th Phys 

• Books to Refer for CBSE Class 12th Physics

• Some Important Physics Preparation Tips :

• Related Articles

Form of Questions

Marks for each Question

No. of Questions

Total Marks

Long Answer Type (LA)

5

3

15

Short Answer (SA I) 3 09 27

3

9

27

Short Answer (SA II) 2 10 20

2

10

20

Very Short Answer (VSA)

1

8

8

TOTAL

30

70

Unit I - Electrostatics

Unit II - Current Electricity

Unit III - Magnetic effect of current & Magnetism

Unit IV - Electromagnetic Induction and Alternating current

Unit V - Electromagnetic Waves

Unit VI - Optics

Unit VII - Dual Nature of Matter

Unit VIII - Atoms and Nuclei

Unit IX - Electronic Devices

Unit X - Communication Systems

IMPORTANT QUESTIONS FOR CLASS 12th  PHYSICS

• Two circular coils X and Y having radii R and respectively are placed in horizontal plane with their centers coinciding with each other. Coil X has a current I flowing through it in the clockwise sense. What must be the current in coil Y to make the total magnetic field at the common centre of the two coils, zero?

• With the same currents flowing in the two coils, if the coil Y is now lifted vertically upwards through a distance R, what would be the net magnetic field at the centre of coil Y?

• A straight thick long wire of uniform cross section of radius ‘a’ is carrying a steady current I. Use Ampere’s circuital law to obtain a relation showing the variation of the magnetic field (Br) inside and outside the wire with distance r, ( ) and ( ) of the field point from the centre of its cross section. Plot a graph showing the nature of this variation.

• Calculate the ratio of magnetic field at a point above the surface of the wire to that at a point below its surface. What is the maximum value of the field of this wire?

• State the principle which helps us to determine the shape of the wavefront at a later time from its given shape at any time. Apply this principle to:

(i) Show that a spherical/ plane wavefront continues to propagate forward as a spherical/plane wave front.

(ii) Derive Snell’s law of refraction by drawing the refracted wavefront corresponding to a plane wavefront incident on the boundary separating a rarer medium from a denser medium.