Results for “magnets”

Naturally occurring magnets discovered in ancient times are called ______. · Magnets used in pencil boxes, stickers and toys are artificial magnets. · Which shapes of magnets are shown in…

…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…

…‘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…

…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…

…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…

…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…

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…

…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 ______. ·…