Hai dây dẫn thẳng dài, song song cách nhau 40 cm. Trong hai dây có hai dòng điện cùng cường độ I1 = I2 = 100A cùng chiều chạy qua. Cảm ứng từ do hệ hai dòng điện gây ra tại điểm M nằm trong mặt phẳng hai dây, cách dòng điện I1 = 10 cm, cách dòng điện I2 = 30 cm có độ lớn là bao nhiêu VẼ HÌNH DỄ HIỂU GIÚP E VS

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làm hộ mình 2 bài đầu nha ( làm cả bài 3 cũng đc) Ex 1: Rewrite the following sentences: 1. He can’t go out because he has to study for his exam. => If………………………………………………….. 2. She is lazy so she can’t pass the exam. If………………………………………………………… 3. He will pay me tonight; I will have enough money to buy a car. => If……………………………………………………………. 4. He smokes too much; that’s why he can’t get rid of his cough. => If…………………………………………………………….. 5. She is very shy, so she doesn’t enjoy the party. => If…………………………………………………………….. 6. I will get a work permit. I will stay for another month. => If…………………………………………………………….. 7. He doesn’t take any exercises. He is so unhealthy => If………………………………………………………………. 8. We can’t get the ticket because I don’t have the right change. => If……………………………………………………………….. Ex 2: Rewrite sentences by combining two sentences into one sentence and using suggested clues: 1. The air is so dirty. I sneeze so much. CONDITIONAL SENTENCE TYPE 2 ________________________________________________________________________________ 2. Their children have birth defects. The parents were exposed to radiation. BECAUSE ________________________________________________________________________________ 3. The air pollution causes breathing problems. LEADS ________________________________________________________________________________ Ex 3: Put the verbs in brackets in correct tenses. 1/ If I (have) ________ a typewriter, I could type it myself. 2/ You could make much progress if you (attend) ________ class regularly. 3/ If I (know) ________ his telephone number, I would give it to you. 4/ If he (study) ________ harder, he can pass an exam. 5/ She may be late if she (not hurry) ________. 6/ Tell him to ring me if you (see) ________ him. 7/ What (you do) ________ if you got fat ? 8/ If you are kind to me, I (be) _______ good to you. 9/ He (come) _______ if you waited. 10/ If you (ring) _______ the bell, the servant would come. 11/ If it (not, rain) _______ a lot, the rice crop wouln’t grow. 12 If today (be) _______ Sunday, we wouldn’t have to work. 13/ We lost the match. If you (play) _______ for us, we (win) _______. 14/ They would not be paid unless they (do) _______ their work well.