Results for “magnets”

Physics · Classes 4–5 · Magnetic and non-magnetic materials Lift the steel pin through a sheet of paper, without the magnet touching the pin. Magnets hold your fridge door shut, stick notes…

…needle is deflected by an electric current? · The region around a magnet in which its force can be detected is called a magnetic ______. · Outside a bar magnet, magnetic field lines go from…

…· A coil of insulated wire wound around an iron nail that becomes a magnet when current flows is called an ______. · What happens to the compass deflection when an iron nail is inserted…

…blades of the turbine and makes it spin. The spinning shaft turns magnets inside the generator, close to coils of copper wire. When a magnet moves near a coil, electricity starts to flow in…

…from Basic 2. One idea behind almost all power stations: spin a magnet inside a coil. Why solar cells are the big exception. Meet Meher from Uttar Pradesh and Lalrinpuii from Mizoram. The…

Physics · Classes 6–7 · Electric current and its magnetic effect Lift at least 10 pins — then switch the current off and watch what happens. Electric bells, doorbells, loudspeakers,…

Physics · Class 10 · Magnetic effects of current: the electric motor Make the coil rotate continuously in one direction. Fans, mixers, pumps, washing machines, electric scooters and hard…

…produced by this effect. Only solar cells work differently. A strong magnet is held completely still inside a coil. The galvanometer shows… Induction needs a changing magnetic field, not…

…4-5 physics, chemistry and biology: floating and sinking, shadows, magnets, circuits, friction, dissolving, evaporation, separation, germination, plants, food tests and the senses. — Part 1…

…‘Spectacular Wonders’, why do vehicles seem to roll uphill at the Magnetic Hill? · In the article ‘Spectacular Wonders’, parked vehicles at the Magnetic Hill move at about 20 km/h. How far…

…a tokamak: a ring of plasma held away from the walls by powerful magnetic fields. Did You Know? India is one of seven partners building ITER in France, the world’s largest fusion…

…and sulfur powder are mixed but not heated. What happens when a magnet is brought near this mixture? · When a mixture of iron filings and sulfur is heated strongly, a black mass forms. Why…

…larger with stronger gravity? · What is believed to create Earth’s magnetic field? · How does Earth’s magnetic field protect life? · Imagine Earth’s magnetic field disappeared. What problem…

…— Physics Experiments 1–5 · floating and sinking, light and shadows, magnets, circuits, forces and friction Experiments 6–8 · solutions, evaporation and the water cycle, separating mixtures…

…a wet surface? · Forces whose effect is felt without contact, like magnetic and gravitational forces, are called ______ forces. · Two magnets are brought close with north poles facing. What…

…gravity is really... A pull by ropes The curving of space and time Magnetism 2. Gravity affects time by... Stopping it Slowing it in stronger gravity Speeding it everywhere 3. Light cannot…

…It keeps the rotation continuous. Induced emf is largest when the magnet moves… A faster change in flux induces more emf. An object at 2F in front of a convex lens gives an image that is……

…how much water is pushed aside. Which pair are BOTH attracted by a magnet? Only iron, steel, nickel and cobalt are magnetic. A seed sprouts in a dark cupboard. What does this prove?…

…is the quickest way to separate them? · Recyclers and industries use magnets fitted to cranes to separate scrap iron from waste. · Which pairs are correctly matched with their separation…

…2. Spin the Turbine, Light the Homes Inside a generator, a spinning magnet near a copper coil makes electricity. Choose the wind speed and see how many homes light up. Too strong a storm,…

Stars shine with their own light. · Before the magnetic compass, how did recognising star patterns help people? · Groups of stars that appear to form patterns (and the regions of sky…

…Tokamak A doughnut-shaped machine that confines fusion plasma with magnetic fields. Triple product Density × temperature × confinement time; the target for fusion ignition. Well-to-wheel…

…gas, geothermal, nuclear — something spins a turbine, which spins magnets inside coils to make alternating current. Advance 1 covered both in detail. Efficiency and Capacity Factor…

…includes experiments such as: - Float or Sink? - Shadow Play - The Magnet Test - Build a Circuit - The Ramp Race - The Dissolving Race - Evaporation and the Water Cycle - Separate the…

…only asks ‘Why?’ and never ‘How?’ · Electricity’s heating and magnetic effects both depend on fundamental forces. · Questions that can be answered by experiments and observation are called…

…about atoms? · J. J. Thomson studied cathode rays in electric and magnetic fields. What did he conclude? · In a clay-and-beads model of Thomson’s atom, what happens if the positive clay has…

…· Which is the finest iron ore with up to 70% iron and excellent magnetic qualities? · The Bailadila hills that produce high-grade haematite are named so because they look like ______. ·…

…happens before answering questions. Ideas like floating and sinking, magnets, circuits, evaporation and how plants drink water become easy to remember. See Science practice and the…

…batteries are attractive because sodium is (a) abundant (b) magnetic (c) radioactive Flow batteries allow power and energy to be (a) sized separately (b) the same always (c) ignored D.…