Grade 11 — Term 2
Aligned with NIE syllabus
This term in the Idasara Academy app has 4 lessons (NIE Units 4, 8, 10, 11). For each lesson, this page gives you the points you must know and one exam-style question with its answer. None of it needs an account.
Is this what my class is doing now?
Maybe not. The Idasara app groups lessons into its own terms, and your school may teach them in a different order. Where we know a lesson's NIE unit, it is shown on the lesson. Find the unit your class is on, and start there.
Lessons in This Term
Diodes, Transistors and Simple Circuits
NIE Unit 8
What you must know
- AND gate: output 1 only if BOTH inputs are 1
- OR gate: output 1 if AT LEAST ONE input is 1
- NOT gate (inverter): output is opposite of input (1→0, 0→1)
- NAND = AND + NOT; NOR = OR + NOT (universal gates)
- Binary: 0 = low voltage; 1 = high voltage
Heat, Temperature and Heat Transfer
NIE Unit 10
What you must know
- Convection: bulk fluid movement; hot rises, cool sinks
- Radiation: infrared EM waves; no medium needed; black bodies emit/absorb best
- Q = mcΔT (heat = mass × specific heat capacity × temperature change)
- Water: c = 4200 J/kg°C (high — resists temperature change)
- Latent heat: energy for state change at constant temperature
Waves, Sound and Light
NIE Unit 11
What you must know
- Period (T): time for one full wave; T = 1/f
- Wave speed: v = fλ
- Sound: needs medium; ≈340 m/s in air; faster in liquids/solids
- Light: 3 × 10⁸ m/s (vacuum); electromagnetic wave; no medium needed
- Pitch ↔ frequency; Loudness ↔ amplitude
Plant Structure and Transport in Plants
NIE Unit 4
What you must know
- Factors affecting transpiration: temperature, humidity, wind, light intensity
- Auxin: causes cell elongation; phototropism — shoots bend toward light
- Root hair cells: large surface area; absorb water by osmosis
- Germination requires: water, warmth, oxygen
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