Bihar Board 10th Science Viral Model Paper 2026 | Science Practice Set 1 | मैट्रिक परीक्षा 2026 | pk скачать в хорошем качестве

Bihar Board 10th Science Viral Model Paper 2026 | Science Practice Set 1 | मैट्रिक परीक्षा 2026 | pk

class 10 science board exam important questions || topper series by pk sir ||science mcq & one liner @P.k.Study_Centre @vikassirbseb @pkstudycentre1 This video is the first part of a "Topper Series" live class by PK Sir, aimed at 10th-grade science students preparing for the Bihar Board exams in 2026 (2:46). The goal of this series is to help students achieve high scores, potentially 90+ marks, in their science exam (7:28). The class covers important objective (MCQ) and one-liner questions, with the one-liner questions also serving as practice for longer 2-mark and 5-mark answer writing (3:19, 8:02-8:40). Key topics discussed in this session include: Physics of Light (10:05-18:20, 32:53-38:20): The focus distance of a plane mirror is infinite (10:05). Laws of light reflection involve the incident ray, reflected ray, and normal lying in the same plane, and the angle of incidence equaling the angle of reflection (10:48). Real images are formed in front of the mirror (12:58). The speed of light is lowest in glass due to its highest density (32:53). Mirror magnification is the ratio of the height of the image to the height of the object (35:12). The transparent front part of the human eye is the cornea (36:05). Bifocal lenses are used to correct presbyopia (37:40). Electricity (13:37-16:52, 33:47-34:10, 41:19-42:16, 43:10-44:50, 46:06-46:40): Ohm's Law relates electric current, potential difference, and resistance (13:37). The practical unit of electrical energy is kilowatt-hour (33:47). An electric fuse works on the heating effect of current and protects appliances from excessive current (41:19, 44:21). Devices like coils do not have positive and negative signs (43:10). The heating element of an electric heater is made of Nichrome (46:06). Biology (34:15-35:01, 38:26-39:25, 42:27-43:09, 45:29-46:03, 47:58-48:26): The human eye forms images on the retina (called drishti patal in Hindi) (34:15). The human heart has four chambers (38:26). Rod cells in the eye are sensitive to dim light (38:55). Water transport in plants occurs through xylem (42:27). Food transport in plants occurs through phloem (42:47). In respiration, organisms take in oxygen and release carbon dioxide (45:29). The full form of DNA is Deoxyribonucleic Acid (47:58). Chemistry (37:09-37:37, 39:34-40:02, 40:46-41:16): Soap is an alkaline salt (37:09). The lightest metal is lithium (39:34). Rusting is an example of oxidation (40:46). General Concepts (47:06-47:55): Solar energy is renewable (47:06). The ability to do work is called energy (47:42). class 10 science vvi questions class 10 science board exam important questions class 10 science mcq questions class 10 science one liner questions class 10 science assertion reason questions class 10 science numericals for board exam