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 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 ...
The phenomenon is called dispersion of light. White light is a mixture of seven colours. Each colour has a different wavelength and, hence, is refracted (bent) by the glass prism through different angles, resulting in a band of seven distinct ...
The correct option is [B]. Sodium hydroxide is called an alkali because it is a base that dissolves in water, forming a basic solution. Ferric hydroxide, though a base, is insoluble in water and not termed an alkali. class 10 science ...