Joule’s Law of Heating states that heat produced in a conductor is directly proportional to the square of current, the resistance of the conductor, and the time for which current flows: H = I²Rt. CBSE Class 10 Science Question Paper 2025 ...
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The correct option is (D). The assertion is false because vultures, being top consumers, have the highest pesticide accumulation due to biological magnification. The reason is true about energy transfer but doesn’t explain it correctly. CBSE Class 10 Science Question Paper ...
The hormone cytokinin is found in regions of rapid cell division, like root and shoot tips, promoting growth. The hormone abscisic acid (ABA) inhibits growth and induces dormancy under stressful conditions. class 10 science half yearly paper class 10 free sample paper ...
The correct option is (c). The height of a plant depends on growth hormones like auxins and gibberellins. Genes code for specific enzymes, which regulate hormone activity, thereby controlling the plant’s height and overall growth. class 10 science Question Paper answer ...
Both A and B are true but R is not the correct explanation of A. Baking soda is used in Soda acid fire extinguishers because it release is carbon dioxide gas upon reaction with H2SO4. CO2 helps put out fire ...