Kerala Board Class 10 Physics — Flashcards

A: Oscillatory motion is a periodic motion in which an object moves to and fro at regular intervals of time about its equilibrium position. Examples: (1) Motion of a pendulum in a clock, (2) Motion of a

A: Amplitude (a) is the magnitude of maximum displacement to one side from the equilibrium position. SI unit: metre (m). It represents how far the oscillating object moves from its rest position during o

A: Period and frequency are inversely related. Formula: f = 1/T or T = 1/f. Where: T = period (time for one oscillation) in seconds, f = frequency (oscillations per second) in Hz. As period increases, fr

A: The heating effect of electric current is the conversion of electric energy mainly into heat energy when current flows through a conductor. This process is called Joule heating or Ohmic heating. Examp

A: Nichrome is used because it has: (1) High oxidation resistance - resists corrosion at high temperatures, (2) Ability to provide heat energy for long time in red hot state, (3) High resistivity - even

A: Resistivity (ρ) is the resistance of a conductor with cross-sectional area of 1 m² and length of 1 m. It is an intrinsic property of materials. Formula: R = ρℓ/A, where R = resistance, ρ = resistivity

A: A lens is a transparent medium in which each refracting surface is part of a sphere. Unlike a plain glass sheet, a lens can converge or diverge light rays due to its curved surfaces. A convex lens con

A: Convex lens: Thicker in the middle, converges light rays, can form real images, principal focus is real. Concave lens: Thinner in the middle (thicker at edges), diverges light rays, forms only virtual

A: Optic centre (O): Midpoint of the lens. Principal focus (F): Point where parallel rays converge (convex) or appear to diverge from (concave) after refraction. Focal length (f): Distance from optic cen