A cell pushes electric current around a circuit., Electric current flows from the positive to the negative end of a cell., You can think of currents as particles flowing around the circuit., A simple circuit is made up of components such as wire, a bulb and a cell., Closing a switch completes a circuit and allows electric current to flow., Opening the switch breaks the circuits. This means the current will not flow., The bulbs shine less brightly when you add more bulbs to the circuits., If you have too many cells in the circuit, the bulbs pop or burn out., Components such as bulbs and buzzers need a certain strength of electricity to be able to work., The voltage is the strength of the electricity., The cell must have a strong enough voltage for the components in the circuit to work., Main electricity has a much stronger voltage than the electricity from cells., Never handle electrical appliances when you are wet., Follow the safety rules when using electricity., A magnet attracts some mental objects to it. These objects are magnetic., Objects not attracted to a magnet are non-magnetic., Magnets have a north pole and a south pole., Unlike poles attract and like poles repel each other., Attraction and repulsion are magnetic forces.,

Science

بواسطة
طباعة
تضمين

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟