This guide includes quick revision notes and practice MCQs with answers for Class 10 Science
students.
,Physics – Light Reflection & Refraction
• Light travels in straight lines.
• Law of reflection: angle of incidence equals angle of reflection.
• Concave mirrors converge light rays.
• Convex mirrors diverge light rays.
• Refraction occurs when light passes through different media.
, Physics – Electricity
• Electric current is the flow of charges.
• Unit of current: Ampere.
• Ohm’s Law: V = IR.
• Power formula: P = VI.
• Series circuits share current; parallel circuits share voltage.