Why is the total resistance of the series circuit larger than any one of the partial resistances? Why is the total resistance of the parallel circuit smaller than any one of the partial resistances
Total resistance in series R = R 1 + R 2 + R 3 +. Of course R is greater than each resistance; parallel 1 / r = 1 / R 1 + 1 / R 2 + 1 / R 3. It's hard to understand here. You can give examples, such as setting several resistance values at will: R 1 = 2, R 2 = 3, R 3 = 4, then r = 12 / 13, smaller than each one
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- 1. The equivalent resistance of series circuit is equal to each series resistance (). If several resistors are connected in series, it is equivalent to increasing the resistance of conductor (), so the total resistance value of series resistance is higher than that of any partial resistance (). The more resistance in series, the greater the total resistance ()
- 2. How to calculate the commutation resistance in physical series circuit? What is the formula? In a similar series circuit, U1 measures the voltage of R1, U2 measures the voltage of r-slip.ammeter A1 measures the current in the circuit. R-slip is "100 Ω, 1a." U1 has a small range and U2 has a large range. The power supply voltage is constant 16 V, R1 is 10 Ω. Now R0 is used to replace R1, which requires the ammeter to reach their full scale respectively. Calculate the resistance value of RO? (this is the formula for solving R0 in similar problems of changing resistance.) In the circuit shown in the figure (that is, a series circuit, U1 measures R1, U2 measures r sliding), the voltmeter V1 has a small range, V2 has a large range, the power supply voltage remains unchanged at 16V, and the sliding rheostat is marked with "100 Ω, 1A". The resistance of R1 is 10 ohm. After closing the electric building s, the voltmeter V1 is 2V. Please replace R1 with a fixed value resistor, and move r slider p to make all meters reach their maximum values, and the circuit works normally. How to find the consistent constant resistance? (2) If the above conditions are met, the rheostat R2 is connected into the resistance range of the circuit.
- 3. Pure resistance formula of grade three How many Zhejiang teachers are there Can we have a few more? Our teacher said a few more, then you will be deformed
- 4. Resistance relation in parallel circuit In parallel circuit, what is the relationship between the resistance of each branch and the total resistance? Why!
- 5. Resistance relation of parallel circuit Is it R1 + R2 divided by r1r2
- 6. In parallel circuit, why is the total resistance equal to the reciprocal sum of the branch resistances?
- 7. If the square of (a + 1) + the square of (2b-3) + |c-1 | = 0, find the value of the cubic power of 3ABC + a-c
- 8. Matlab dichotomy programming Using dichotomy to find the root of the equation: X * x + 53.99x-0.054 = 0
- 9. 12 - Four Thirds equals
- 10. If two-thirds of a is equal to three-quarters of B, then a: B =?
- 11. There is also an exercise in sine theorem and cosine theorem Sina + sinc = SINB how to get 2sina + C / 2 * cosa-c / 2 = 2sinb from sum difference product formula
- 12. Let x, y be greater than zero, and 2x + 5Y = 20. If M = old x + old y, then the maximum value of M is?
- 13. Note: "e" is belonging to; "^" is the square; "C" is included in the set; "/" in the set is the column in the set, not divided by; Given the set a = {X / ax + B = 1}, B = {X / ax + b > 4}, where a is not equal to 0, if the element in a must be the element in B, find the value range of real number B Solution: the element of a is x = (1-B) / A and E B, so a * (1-B) / a - b > 4 (in this step, I don't understand why it's - B, isn't it + B? Because ax + b > 4, x = (1-B) / a, so substituting in is not a * (1-B) / A + right? I don't understand.) 4. Because of the restriction of element C {1,5} in nonempty set s. I don't quite understand this. Can you explain it in detail? I understand everything else. Also, do you have any good reference books to recommend to me?
- 14. Let set a X be greater than minus one and less than 2 b set: 4PX plus one is less than 0, try to judge whether there is some inclusion relationship between ab? If so, find out the value range of P and indicate the corresponding inclusion relationship. If not, explain the reason
- 15. Which point does the logarithm of y = 1-log (a is the base 2-x) pass?
- 16. As shown in the figure, if the edge length of the inscribed quadrilateral ABCD is ab = 2, BC = 6, CD = Da = 4, then the area of the quadrilateral ABCD is () A. 163B. 8C. 323D. 83
- 17. Given a = 3a-4b + C, B = 5A + 4B + 2c, find [1] A-B; [2] a + B; [3] 2a-3b
- 18. If a + B + C = 30, 3A + B-C = 50, a, B, C are all non negative numbers, try to find the value range of = 5A + 4B + 2C
- 19. If a + B = C, a > C, then () A. B must be negative, B. a must be less than B, C. A must be negative, D. must be less than a
- 20. Three non negative numbers a, B, C, satisfy 2A + B-C = 5, A-B + 2C = 7, find the minimum value of a + B + C