Hello Aspirant
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The important concepts in physics for 11 class exam is :
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• SI units and dimensional analysis
• Kinematics
• Laws of motion
• Work, Energy and Power
• Motion of system of particles and rigid body
• Gravitation
• Properties of bulk matter
• Thermodynamics
• Kinetic theory
• Oscillations and Waves

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You can also add some other topics to score more marks in the exam.
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If you have any questions further let me know
Thank you!!!