konduktor = conductor Put the material being tested in place of the switch. If the bulb lights, electricity passes through it and completes the path, so the material is a conductor. Example: An iron nail, aluminium foil and copper wire all make the bulb light, so they are conductors. Watch out: Most metals conduct, but classify by the test result, not by colour or shininess.
Langkah 2
Penebat tidak membolehkan mentol menyala
Jika mentol tidak menyala walaupun litar lain berfungsi, bahan yang diuji tidak membenarkan arus melaluinya. Bahan itu ialah penebat.
penebat = insulator If the rest of the circuit works but the bulb stays dark with the material in place, electricity cannot pass through it. That material is an insulator. Example: A wooden ruler, a plastic ruler and an eraser keep the bulb dark, so they are insulators. Watch out: First make sure the circuit itself works; otherwise a dark bulb may mean a flat cell, not an insulator.
Langkah 3
Ujian mesti menggunakan litar yang sama
Uji satu objek pada satu masa menggunakan litar, sel kering dan mentol yang sama. Rekod nyalaan sebelum membuat pengelasan.
objek berubah | litar lain kekal sama
litar yang sama = 同一个电路 每次只测试一样物品,而且用同一个电路、同一颗电池和同一个灯泡。先记录灯泡亮不亮,再分类。 例子:测试五样物品,就在表格上写五行,每行写“亮”或“不亮”。 注意:中途换了电池或灯泡,前后的结果就不能拿来比较。
litar yang sama = the same circuit Test one object at a time using the same circuit, the same cell and the same bulb. Record whether the bulb lights before you classify. Example: To test five objects, make a table with five rows and write lit or not lit in each row. Watch out: If you change the cell or bulb halfway, the earlier and later results cannot be compared.
Semak cepat · Soalan 1 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Mentol menyala apabila sudu logam diuji. Sudu itu ialah...
sudu logam diuji = testing a metal spoon The clue is that the bulb lights when the metal spoon is in the circuit. Recall steps 1 and 2: which group does a lit bulb point to, and which group does a dark bulb point to? Classify using that result. Example: An iron paper clip in the circuit also makes the bulb glow. Watch out: Classify by what the bulb does, not by the spoon's shape or size.
Semak cepat · Soalan 2 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Mentol tidak menyala apabila getah diuji. Getah itu ialah...
getah diuji = testing rubber The clue is that the bulb stays dark when rubber is in the circuit. Make sure the question asks for a type of material, then recall what a dark bulb means. Example: A plastic drinking straw in the circuit also leaves the bulb dark. Watch out: Rubber is soft and stretchy, but you must classify it by the test result alone.
Ringkasan
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Kamu telah belajar tentang Konduktor dan Penebat.
Ingat: konduktor membolehkan mentol menyala; penebat tidak membolehkan mentol menyala; ujian mesti menggunakan litar yang sama.