Who knows to the fast electric kettle to know the voltage is 220 V, the power is 1200 W. how much is the current

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• 1. The electromotive force of the power supply is e = 12V, and the internal resistance R = 0.5 Ω. A bulb with rated voltage of 8V and rated power of 16W is connected with a bulb with coil resistance R of 0.5 Ω After the DC motor is connected in parallel with the power supply, the bulb just lights normally, and the total current is calculated ① U motor = u bulb = 8V = u external circuit ﹥ u internal circuit = E-U external circuit = 4V ﹥ total current = 4V ﹥ 0.5eu = 8A ② R outer = 4 × 0.5 △ 4 + 0.5 = 4 / 9 total current = E / (4 / 9 + 0.5) = an extra large fraction Why are the numbers calculated different? Why is the second method wrong?
• 2. Single phase bridge rectifier capacitor filter circuit is shown in Figure 5, known U2 = 20V, load resistance RL = 40, C = 1000 μ F &Single phase bridge rectifier capacitor filter circuit is shown in Figure 5, known U2 = 20V, load resistance RL = 40, C = 1000 μ F. find: (1) normal output voltage; (3 minutes) & nbsp; (2) output voltage when a diode is open circuit; (4 minutes) & nbsp; & nbsp; (3) if the measured output voltage of the circuit is the following value, it indicates what fault may occur in the circuit. (1) uo = 18V; (2) output voltage when a diode is open circuit Uo = 28V ③ uo = 9V (3 points)
• 3. Classification of the past tense of English Verbs
• 4. When is the ing form of a verb a noun and an adjective? I'm confused. Can anyone summarize it? What are the components of the sentence?
• 5. Verb + ing can be a noun or an adjective, right? What part of speech can it be?
• 6. The adjective "ing" is an adjective formed by adding "ing" to a verb Isn't ing used to express progressive? How can it express adjectives? What's the matter It doesn't work to use this form?
• 7. What are nouns? What are verbs? What are adjectives? How to distinguish, better give some sentences
• 8. Hardware is a noun, it's not a verb. Why does it add ing to become an adjective of hardware? Or does the noun add ing also have some adjective form Get rid of it. Be clear
• 9. Is the addition of ing to a verb a noun form of a verb
• 10. Some adjectives in English are composed of verb ing or verb + ed. 10 examples The more, the better
• 11. If the resistance of series circuit increases, is the total energy consumed large or small? If the resistance of parallel circuit branch increases, is the total energy consumed large or small
• 12. The difference between triangle start and star start of three phase asynchronous motor?
• 13. The following statements are correct: 1.0 is the number with the smallest absolute value. 2. The number whose opposite number is greater than itself is negative. 3. The numbers on both sides of the origin on the number axis are reciprocal to each other. 4. Compared with two balls, the number with the largest absolute value is smaller. A.1.2 B.1.3 c.2.3 d.1.4
• 14. It is known that: as shown in the figure, D is the midpoint of BC side of △ ABC, de ⊥ AB, DF ⊥ AC, the perpendicular feet are e, f respectively, and de = DF. Please judge what triangle ⊥ ABC is? And explain the reason
• 15. The calculation of space vector In the known parallelepiped abcd-a'b'c'd ', ab = a, ad = B, AA' = C, ∠ bad = α, ∠ baa '= β, ∠ DAA' = γ, a, B, C, α, β, γ are used to denote the length of diagonal AC '
• 16. It is known that an is an arithmetic sequence and BN is a proportional sequence And A1 = B1 = 2, B4 = 54, a1 + A2 = A3 = B2 + B3 The general term formula of BN Finding the first 10 terms and S10 of sequence an
• 17. SiN x = 1 / 3, sin (x + y) = 1, find the value of sin (3x + 2Y)
• 18. For curvilinear motion, the following statement is correct () A. If the speed of an object changes, it must move in a curve. B. when an object moves in a curve, its speed must change. C. when an object moves in a curve, its acceleration direction is always the same as that of the speed. D. when an object moves in a curve, its acceleration direction is always the same as that of the external force
• 19. Solve the equation (150 / x) - 150 / 1.5x = 18.75
• 20. For a three digit number, the number on the ten digit number is four times larger than that on the individual digit number, and the number on the individual digit number is two times larger than that on the hundred digit number Find the three digits