It is impracticable to connect an electric bulb and an electric heater in series because they will not get currents and voltages as per their... View Article
Voltage, V = 220 V Power, P = 1 kW = 1000 W Fuse current, I = 5 A To find: Current flow in the circuit, I. Solution: We know that, power is given... View Article
Joule's Law of Heating refers to the heat generated by an electrical conductor is directly proportional to the product of its resistance (R) and... View Article
(a) Given: Resistance of the resistors = R1,R2,R3, and R4 To find: Equivalent resistance, (Req) between M & N. Here, from the figure we can... View Article
Sex-selective abortion is the method of terminating a pregnancy based upon the predicted sex of the infant (unborn foetus). It affects a healthy... View Article
Oral contraceptives are tablets that are taken orally and contain small doses of hormones. This prevents the release of eggs and thereby helps in... View Article
Use of a condom is beneficial for both the sexes involved in a sexual act, because a condom is the kind of contraception that protects a person... View Article
After fertilization, (i) The ovule develops into a seed. (ii) The ovary develops into a fruit. In plants, fertilization is a process of sexual... View Article
The function of the pollen tube is to carry male gametes towards the ovary through stigma and style. It enters the ovule through the micropylar... View Article
Pollen germination starts with the pollen grain landing on stigma. The cell of the pollen grain divides into two cells- one of these is smaller... View Article
When blood vessels or the circulatory vessels get damaged or injured or punctured, blood oozes out into the nearby tissues that cause the... View Article
The blood from the right atrium enters the right ventricle. Then it reaches pulmonary arteries that carry deoxygenated blood from the right... View Article
Cyclohexane is a cycloalkane with the molecular formula C6H12. In the structure formula of cyclohexane there are 16 single bonds present. The... View Article
Soaps Detergents Soaps are sodium or potassium salts of long-chain fatty acids / carboxylic acids. Detergents are ammonium or sulphonate... View Article
Ionic compounds are solids and some what hard because of strong force of attraction between positive and negative ions. Ionic compounds are... View Article
Magnesium has Atomic Number = 12. Its electronic configuration is 2,8,2. Chlorine has Atomic Number = 17. Its electronic configuration is 2,8,7.... View Article
(i) When mercuric oxide (HgO), a red solid, is heated at a very high temperature, it decomposes to give mercury (Hg), a grey residue and Oxygen... View Article
(a) If a person is suffering from both myopia and hypermetropia. (i) Bifocal lenses can correct this defect. (ii) These lenses are prepared by... View Article
(a) The labeled ray diagram given below, showing the path followed by a narrow beam of monochromatic light when it passes through a glass... View Article
