![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
The method of measuring resistance with voltmeter and ammeter is called voltammetry. Its principle is as follows_____ . In the experiment of measuring resistance by voltammetry, the function of sliding rheostat is______________ Change the current in the measured conductor and the voltage at both ends three times in order to____________
In the experiment of measuring resistance by voltammetry, the function of sliding rheostat is_______ Changing the voltage produces a different voltage_______ Change the current in the measured conductor and the voltage at both ends three times in order to_____ Averaging by multiple measurements_______
RELATED INFORMATIONS
- 1. How many watts is 1p equal to
- 2. What is power W equal to
- 3. What is the relationship between current to voltage ratio, resistance to power ratio in series parallel circuit?
- 4. What is the physical meaning of velocity? What is the symbol?
- 5. How to convert the old and new units of capacitance?
- 6. As shown in the figure, the graph of the function f (x) defined on [- 1, + ∞) consists of a line segment and a part of a parabola, then the analytic expression of F (x) is______ ．
- 7. For some primary school fifth grade answers Write three fractions of the same size as 16 out of 40 Fill in the simplest fraction in brackets 600 kg = [] t 90 points = [] 75cm = [] m 65 ml = [] l 30m=【 】km 450g=【 】kg Training homework: divide a score into two parts, three parts and five parts. The final result is two-thirds. What is the original score? Crab crab help!
- 8. It is known that the sum of the first n terms of the arithmetic sequence is Sn = - 2n ^ 2-n. the formula of an general term and a1 + A2 + a3 +. + A15 are obtained=
- 9. Xiao Ming and Xiao Gang collect stamps together. The ratio of the number of stamps of Xiao Ming and Xiao Gang is 6:5. If Xiao Ming gives Xiao Gang nine stamps, the ratio of the number of stamps of the two is 3:4
- 10. Given that there are two points a and B on the number axis, the distance between a and B is 1, and the distance between a and the origin is 3, then the number corresponding to point B is ()
- 11. It is known that R1: R2 = 1:2. When resistor R1 and R2 are in parallel, what is the ratio of electric power P1: P2? When resistor R1 and R2 are in series, the ratio of heat Q1: Q2 =?
- 12. When a bulb marked pz220-40 is connected to a 110 volt circuit, the actual power consumed by the bulb is
- 13. A kilowatt hour is a kilowatt. Do you need the next kilowatt hour
- 14. What is the specific resistance value of "1K", "100", "10" and "1" in ohmmeter? Is it that the resistance value is small when the number of blocks is large? It's not about how to calculate in use, but about the internal structure of the ohmmeter Is the internal ohmmeter equivalent to an ammeter or a voltmeter? If it is an ammeter, then its full bias current I should be constant no matter in which gear. In this way, the full bias current multiplied by the resistance value of different gears is the total voltage. If the resistance value of each gear is different, then the total voltage is also different. This is definitely not right. What's the situation?
- 15. 11. A voltmeter is composed of ammeter g and resistor R in series, as shown in the figure. If it is found that the reading of this voltmeter is always a little smaller than the accurate value in use, take 11. A voltmeter is composed of ammeter g and resistor R in series, as shown in the figure. If it is found that the reading of this voltmeter is smaller than the accurate value, which of the following measures can be adopted to improve it A. A resistor much smaller than R is connected in series with R B. A resistor much larger than R is connected in series with R C. Parallel a much smaller resistor to R D. Parallel a much larger resistor to R
- 16. The function of resistance and capacitance Resistance and capacitance introduction, resistance type classification, resistance basic circuit What are resistance and capacitance? Where are the different places?
- 17. There are three red, yellow and blue balls of the same size in one pocket. At least () balls should be found at a time. There must be two balls of the same color
- 18. There are 20 red, yellow and blue balls of the same size and texture in the pocket. Only when you touch at least a few balls at a time can you guarantee at least four colors The same color? Process and answer
- 19. A box contains the same size but different colors of the ball, respectively, red, yellow, green, white four colors of the ball each 10, ask at least to find out______ Five balls guarantee five of the same color
- 20. There are 10 red, yellow and blue balls in one pocket. How many balls do you need to find out if you want to find out 10 balls of the same color? A、4 B、5 C、6 D、10 I don't think it's right At least... Wrong? It can't be 10. Can you guarantee it's the same 10 times? Then you go to buy lottery tickets! If you really mean to be more specific! Why?