Complete the sentences with the phrases from Exercises 2
1.The early Chinese people developed a w___ l___ as a way to record ideas and events.
2.Divers have discovered important a___ f___ under water.
3.An e___ t___ of ancient Egyptian pharaoh has been discovered.
4.Napoleon Bonaparte was a p___ e___ and had a strong army.
5.Each of the portraits has a different f___ e___.
6.The statues that were uncovered, f___ u___ and in their original states.
7.Archaeologists have discovered skeletons at an ancient b___ s___.
8.The emperor had many soldiers and an a___ of w___ to protect the empire.
Вместо ___ дополните слова мне нужно
2. Materials that offer slight opposition are called conductors. Conductors are substances that allow electric current to flow easily through them. Examples of conductors are metals like copper and aluminum.
3. The best insulators are materials that offer high resistance to the flow of electric current. Insulators do not allow electric current to pass through them easily. Examples of insulators are rubber, plastic, and glass.
4. There are various kinds of electric circuits such as series circuits and parallel circuits. In a series circuit, the components are connected one after another, forming a single path for the current to flow. In a parallel circuit, the components are connected in separate branches, providing multiple paths for the current to flow.
5. We "open" the circuit when we break the connection between two points in the circuit. This can be done by removing a component or by opening a switch. When the circuit is open, electric current cannot flow.
6. We "close" the circuit when we complete the connection between two points in the circuit. This is usually done by adding a component or by closing a switch. When the circuit is closed, electric current can flow.
7. The "short" circuit is produced when there is a direct connection between two points in the circuit with very low resistance. This bypasses the components in the circuit and allows a large amount of current to flow. A short circuit can be dangerous and can cause overheating or damage to the circuit.
8. A fuse is a safety device that is used to protect a circuit from excessive current. It consists of a metal wire that melts when the current exceeds a certain level. When the fuse melts, it breaks the circuit and stops the flow of current, preventing damage or fire.
I hope this explanation helps you understand the terms and concepts related to electric circuits. If you have any further questions, feel free to ask!