NCERT Exemplar Solution for Class 7 Science Chapter-14 Electric Current and Its Effects
Electricity plays a major role in everyday life, from lighting homes to operating machines and electronic devices. Chapter 14, Electric Current and Its Effects, introduces students to the basic concepts of electric circuits, heating effects of electric current, and magnetic effects produced by electricity. The chapter helps learners understand how electrical devices function and how electricity can create heat and magnetism when current flows through a conductor. Through practical examples and activity-based learning, students can connect scientific concepts with daily life applications. The NCERT Exemplar Solution for Class 7 Science provides concept-oriented questions that improve logical understanding and problem-solving skills. Using the NCERT Exemplar Solution for class 7, students can strengthen their preparation for school exams and develop clarity on important scientific principles. Learners searching for useful NCERT solutions for class 7 often prefer exemplar exercises because they explain concepts in a detailed yet easy-to-understand manner.
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Electric Circuits and Flow of Current
An electric circuit is a complete path through which electric current flows. A simple electric circuit usually contains a cell or battery, wires, a switch, and an electric device such as a bulb. When the switch is turned on, the circuit becomes complete and electric current flows through it, causing the bulb to glow.
The chapter explains the importance of conductors and insulators in electrical circuits. Materials that allow electric current to pass through them easily are called conductors. Copper and aluminum are common examples. Materials that do not allow current to pass through them are called insulators. Rubber, plastic, and wood are commonly used as insulating materials for safety purposes. Students also learn about electric cells and batteries. A cell produces electricity through chemical reactions, while a battery is a combination of two or more cells. Electrical energy stored in batteries is used in torches, clocks, toys, and many household devices.
Switches are another important part of electric circuits. A switch controls the flow of current by opening or closing the circuit. When the circuit is open, current does not flow. When the circuit is closed, current flows easily. Understanding circuit diagrams is an important part of this chapter. Standard symbols are used to represent electrical components in diagrams. These diagrams help students understand connections clearly and improve their ability to interpret scientific illustrations.
Heating Effect of Electric Current
One of the most important effects of electric current is the heating effect. When electric current passes through a wire, the wire becomes hot. This heat is produced because electrical energy changes into heat energy.
Many household appliances work on the heating effect of electric current. Electric heaters, irons, kettles, geysers, and toasters are common examples. These devices contain heating elements made of materials with high resistance, which produce heat when current passes through them. The chapter also explains the function of an electric fuse. A fuse is a safety device that protects electrical appliances from damage caused by excessive current. It contains a thin wire that melts when too much current flows through the circuit, breaking the circuit and preventing accidents. Students learn that electrical safety is extremely important. Wet hands should never touch electric switches or appliances, and damaged wires should be replaced immediately. These safety precautions help prevent electric shocks and short circuits.
The heating effect of electric current also has practical uses in industries and laboratories. It is used in electric bulbs, soldering devices, and heating systems. Understanding this concept helps students appreciate how electrical energy is converted into useful forms in daily life.
Magnetic Effect of Electric Current
Electric current can also produce magnetism. When current passes through a wire, a magnetic field is created around it. This phenomenon is known as the magnetic effect of electric current.
An electromagnet is formed when electric current passes through a wire wound around an iron piece. The iron becomes magnetic as long as current flows through the wire. Electromagnets are very useful because their strength can be controlled by changing the amount of current. Electromagnets are used in electric bells, cranes, motors, and many electronic devices. In electric bells, the magnetic effect helps produce sound by moving a metal hammer repeatedly. Large cranes use powerful electromagnets to lift heavy iron objects in factories and scrapyards.
The chapter encourages students to perform simple activities and observations related to circuits and magnets. These experiments help learners understand concepts practically and increase curiosity about science and technology. Exemplar questions and NCERT Exemplar Solution related to electric circuits, fuses, electromagnets, and heating effects improve analytical thinking and help students prepare effectively for examinations. They also teach students the importance of electrical safety and responsible use of electricity.
FAQs for NCERT Exemplar Solution for Class 7 Science Chapter 14 Electric Current and Its Effects
Electric Current and Its Effects is an important chapter because it introduces students to the practical uses of electricity in everyday life. It explains electric circuits, conductors, insulators, heating effects, and magnetic effects in a simple and understandable way. Students learn how appliances work, how electric bells function, and why safety devices like fuses are necessary. The chapter also develops scientific observation and problem-solving skills through experiments and activity-based learning. Understanding these concepts builds a strong foundation for higher-level physics topics in future classes and helps students connect science with real-world technology and electrical systems used around them.
NCERT Exemplar Solutions help students by providing detailed explanations and application-based questions related to electric current and its effects. These solutions include conceptual questions, diagram-based exercises, and reasoning problems that improve scientific understanding. Students can practice important topics such as electric circuits, heating effects, magnetic effects, and electric safety systematically. The solutions also improve analytical thinking and help learners write clear and accurate answers during examinations. By solving exemplar questions regularly, students gain confidence in understanding practical applications of electricity and strengthen their preparation for school tests as well as competitive examinations in the future.