PYQSide ExamsMy practice

Electromagnetic Waves · Question 44

AIPMT 2002MCQEasy📈 Topic in 38% papers+4−1
1

What is the cause of greenhouse effect?

  1. infra-red rays
  2. ultra violet rays
  3. X-rays
  4. radio waves.

Answer

(1) infra-red rays

Solution

As per NCERT, infrared waves help to maintain the earth's warmth or average temperature through the greenhouse effect.

The earth's surface re-radiates infrared rays, which are absorbed by greenhouse gases (CO2, water vapour) and trapped in the atmosphere.

Answer: (1)

AIPMT 2002

Keep practising — Electromagnetic Waves

2

Biological importance of ozone layer is

  1. it stops ultraviolet rays
  2. ozone layer reduces greenhouse effect
  3. ozone layer reflects radio waves
  4. ozone layer controls O2/H2 ratio in atmosphere
AIPMT 2001
3

The frequency order for -rays (a), X-rays (b), UV rays (c) is

  1. b > a > c
  2. a > b > c
  3. c > b > a
  4. a > c > b
AIPMT 2000

All Electromagnetic Waves PYQs →

PDFDownload Electromagnetic Waves PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Physics chapters
Class 11Units and MeasurementsMotion in a Straight LineMotion in a PlaneLaws of MotionWork, Energy and PowerSystem of Particles and Rotational MotionGravitationMechanical Properties of SolidsMechanical Properties of FluidsThermal Properties of MatterThermodynamics (Physics)Kinetic TheoryOscillationsWaves
Class 12Electric Charges and FieldsElectrostatic Potential and CapacitanceCurrent ElectricityMoving Charges and MagnetismMagnetism and MatterElectromagnetic InductionAlternating CurrentElectromagnetic WavesRay Optics and Optical InstrumentsWave OpticsDual Nature of Radiation and MatterAtomsNucleiSemiconductor ElectronicsExperimental Skills (Physics)