अध्याय 1 — Physical World
(भौतिक जगत) — कक्षा 11, Physics (Part I)
10 Practice Questions with Solutions
Solution: भौतिक विज्ञान में प्राकृतिक phenomena और उनके नियम पढ़े जाते हैं। विज्ञान में observation, experiment और analysis का व्यापक study होता है।
Solution: Mechanics, Thermodynamics, Electromagnetism
Solution: Atom, nucleus, quantum phenomena, relativity
Solution: 4 forces: Gravitational, Electromagnetic, Strong nuclear, Weak nuclear
Solution: Gravitational: हमेशा attractive, बहुत weak, long-range
Electromagnetic: attractive/repulsive, strong, long-range
Solution: Nuclear energy, Laser, Semiconductors, Space research, Quantum mechanics
Solution: Experiment को reproduce करने, results को compare करने और precise communication के लिए measurement जरूरी है।
Solution: Length (m), Mass (kg), Time (s), Current (A), Temperature (K), Amount of substance (mol), Luminous intensity (cd)
Solution: Relative Error = Δa / a
Percentage Error = (Δa / a) × 100%
Solution: Classical: macroscopic phenomena, deterministic, Newton laws
Modern: microscopic, quantum & relativistic, probabilistic
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