Ans: The eye perceives different colors through specialized photoreceptor cells called cones and rods. Cones are responsible for detecting color and detail in bright…
Ans: Common eye problems include myopia (nearsightedness), hypermetropia (farsightedness), astigmatism, presbyopia, and cataracts. These issues can often be treated by using corrective lenses to…
Ans: The human eye adjusts its focus to see objects at different distances through a process called accommodation. Accommodation refers to the eye’s ability…
Ans. The human eye consists of several key components: Cornea: The eye is spherical and has a protective white layer. The front part of…
Ans: The eye is a wonderful sensory organ that detects and processes light, enabling us to perceive the environment around us. The light enters…
Ans: A loudspeaker works by combining electricity and magnetism. When an electric current flows through a coil of wire attached to a diaphragm (a…
Ans: Magnetic fields play a crucial role in devices like transformers. Transformers use magnetic fields to transfer electrical energy between two coils of wire.…
Ans: Here are the applications of electromagnets: Power generators, electric motors, and transformers Doorbells and buzzers Headphones and loudspeakers Relays and control valves Data…
Ans: Direct Current (DC) Alternating Current (AC) The electric charge flows in only one direction, from the positive terminal to the negative terminal. It…
Ans: Electric generator works on the principle of electromagnetic induction. An electric generator is a device which convert mechanical energy to electric energy. The…
Ans: The direction of induced current in a coil follows Lenz’s Law, which states that it opposes changes in the magnetic field. If the…
Ans: Faraday’s Laws of Electromagnetic Induction are composed of two principles. The first law explains how emf (electromotive force) is generated in a conductor,…
Ans: A galvanometer is a device used to detect and measure electric current in a circuit. It operates based on the principle of electromagnetic…
Ans: An electric motor is a device that converts electrical energy into mechanical energy. Principle: In a basic electric motor, when an electric current…
Ans: Electromagnets are magnets whose magnetic field is generated by electricity. Unlike regular magnets that always have their magnetism, an electromagnet’s strength can be…
Ans: A coiled wire, wound closely and neatly into a cylinder shape, is called a solenoid, as you can see in the picture. The…
Ans: We can determine the direction of the magnetic field around a current-carrying wire by following a guideline known as the “right-hand thumb rule.”…
Ans: Electric current is basically how fast electric charge is moving. We already know that when charges stay in one place, they create an…
Ans: When electricity flows through a wire, the wire acts like a magnet. This is called the magnetic effect of electric current. But if…
Ans: Voluntary Action Involuntary Action Voluntary actions are under conscious control. They are initiated, directed, and controlled by the individual’s conscious intention and will.…
Ans: The hypothalamus plays a central role in regulating body temperature by acting as the body’s thermostat. It detects changes in core temperature and…
Ans: The eye is a complex sensory organ responsible for our sense of vision. It functions by allowing light to enter, focusing that light…
Ans: Sensory receptors are specialized structures or cells in the body that detect and respond to various types of stimuli or sensory information from…
Ans: Homeostasis is a fundamental biological concept that refers to the body’s ability to maintain a stable and relatively constant internal environment despite external…
Ans: Hormones play a significant role in influencing growth and development in living organisms. They regulate various aspects of growth, including physical size, cellular…
The quick, unintentional reaction towards a stimulus that is harmful for the human body, is called a Reflex Action. Reflex action is a reaction…
Ans: Nervous System Endocrine System The network of nerves forming a system in an animal. The organ systems of animals consist of different glands.…
Hormones are chemical messengers produced by specialized glands and tissues in the body’s endocrine system. These molecules play a crucial role in regulating various…
Ans: The endocrine system is a complex network of glands and organs that regulate and control various physiological processes in the body by secreting…
Ans: Neurons are specialized cells that are the fundamental building blocks of the nervous system. They are responsible for transmitting signals, called nerve impulses…
