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Circuit diagram of internal connection and external connection of voltammetric resistance ammeter
The circuit diagram of the internal and external methods of the voltammetric resistance ammeter is as follows
When connected internally, the reading of ammeter is correct, and the reading of voltmeter is too large; when connected externally, the reading of voltmeter is correct, and the reading of ammeter is too large. The internal connection method is suitable for measuring large resistance, and the measured value is greater than the real value
The external connection method is suitable for measuring small resistance, and the measured value is less than the real value
How to see the electrical circuit diagram? How to see the ammeter resistance? What measures the current
Find out which are parallel, which are series, and the direction of current
The ammeter measures its own current through the ammeter, and then see who is in series with the ammeter and whose current in series is equal
If the ammeter is connected in series with the resistance of the consumer, which current is to be measured
It refers to a circuit with electrical appliances, resistors, ammeters and power supply. When these are connected in series, what current does the ammeter measure?
If an electric appliance is connected in series with a resistor and then connected in series with an ammeter, the current of the electric appliance and the resistor will be measured, because the current in the series circuit is equal. If you connect the electric appliance and the resistor in parallel and then connect the ammeter in series, the total current of the electric appliance and the resistor will be measured
What happens when the ammeter is connected in parallel with the measured object
Will the measured object be short circuited? What is the current indication? What will happen to the whole circuit? If you can answer it, by the way, what will happen to the above questions if the voltmeter is connected in series in the circuit?
The ammeter is connected in parallel. If there is no user in series, it is short circuit. The whole circuit will also be short circuit. However, if there are other users, the current will not overload the ammeter
The voltmeter is also the same, that is, open circuit, but if it is just a branch, it is equivalent to taking away the original electrical appliance and measuring the voltage of the new object
RELATED INFORMATIONS
- 1. When measuring the current, the ammeter should be connected in parallel with the circuit under test Is that right
- 2. When doing the experiment to explore the current relationship between each branch and main circuit of parallel circuit, there are three ammeters. Which ammeter should be touched? One branch is 5 Ω, the other is 10 Ω, the power supply voltage is 3V, the range of ammeter is 0 ~ 0.6A 0 ~ 3a
- 3. How to use ammeter and voltmeter to measure voltage and current at both ends of a section of conductor at the same time
- 4. How to measure the constant resistance of small bulb if there is only voltmeter but no ammeter
- 5. An ammeter and a voltmeter are sensitive galvanometers (series or parallel) and extremely (large or small) resistors
- 6. [electricity] Why is the ammeter connected in parallel with a small resistor, and the voltmeter connected in series with a large resistor and a sensitive galvanometer, so the sensitive galvanometer becomes an ideal state [electricity] does sensitive galvanometer have resistance? Why is the ammeter connected in parallel with a small resistance, and the voltmeter connected in series with a large resistance and sensitive galvanometer
- 7. Xiao Hong wants to measure the current of a circuit, but she can't estimate its size. How should she choose the range of the ammeter? When she connected the ammeter to the circuit, the pointer deflected to the side without scale. What's the reason?
- 8. When using the ammeter! Why do you need zero correction? If the measured current exceeds the range of the ammeter, what will happen!
- 9. A series circuit. The ammeter is between two lamps. Which lamp's current is measured by the ammeter
- 10. The ammeter must be connected in series in the circuit to be measured. Under what circumstances is the ammeter connected in parallel in the circuit to be measured? Please use the circuit diagram. Also, I said in my book that the ammeter can't be directly connected in parallel with the consumer or ammeter. What's the circuit diagram in this case?
- 11. Is the current measured different when the ammeter is placed in a parallel circuit I mean let you tell me: ammeter in parallel circuit, if you want to measure the current of the bulb, should the ammeter be placed in front of or behind the bulb?
- 12. As shown in figure a, it is a schematic diagram of using thermistor to measure temperature. In this diagram, the temperature to be measured can be reflected not only by the indication of ammeter, but also by the indication of voltmeter. It is known that the power supply voltage is 20V and remains unchanged, R0 is the constant resistance, and the resistance value is 30 Ω. The relationship between the resistance value of thermistor R and temperature is shown in Figure B (1) When the temperature to be measured increases, how does the ratio of voltage representation to current representation change? (2) When the temperature to be measured is 24 ℃, what are the indication numbers of ammeter and voltmeter? (3) It is known that the range of ammeter is 0 ~ 0.6A and that of voltmeter is 0 ~ 15V. What is the maximum temperature that this circuit can measure? What is the power consumption of thermistor r at this time?
- 13. In addition to the ammeter can measure the size of the current, what other purposes?
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- 19. The complex function zsin (1 / z) has a limit when Z tends to 0. According to the theorem, 0 should be the removable pole of the function, which is expanded into a series with infinite negative terms 0 is its de - extreme or its essential extreme
- 20. The complex function z = 0 is the m-order pole of function 1 / Z ^ 2 + 1 / Z ^ 3, M =?