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To explore the relationship between current and voltage through the conductor, how to keep the resistance constant when the sliding rheostat changes the voltage in the test To explore the relationship between current and voltage through the conductor in the test Slide the rheostat to change the voltage. I know, but when you move the rheostat, the voltage changes and the resistance changes Why can the resistance remain unchanged? The length of the current has changed
In the experiment of exploring the relationship between current and voltage passing through conductor, the sliding rheostat is connected in series with a certain value resistor (research object) and then connected in the circuit. The voltmeter measures the voltage at both ends of the constant value resistor. When the sliding rheostat changes the voltage, the total resistance of the sliding rheostat itself and the whole circuit does change, But as the object of study, the value of constant resistance is fixed. For it, only voltage and current are changed
In the experiments of "exploring the relationship between current and voltage" and "exploring the relationship between current and resistance", what are the functions of sliding rheostat?
In exploring the relationship between current and voltage, keeping the resistance constant, the main function of sliding rheostat is to change the voltage at both ends of conductor
When exploring the relationship between current and resistance, the constant resistance needs to be replaced. The main function of sliding rheostat is to keep the voltage at both ends of conductor unchanged
The control variable method is used in both processes
In the experiment of studying the relationship between current and voltage, is the function of sliding rheostat to control the resistance unchanged?
In the experiment of studying the relationship between electric current and resistance, is the function of sliding rheostat to keep the voltage constant?
There is a fixed resistance in the circuit to protect the circuit, and the sliding rheostat is used to change the resistance in the circuit to get different groups of current and voltage, so as to get the relationship between current and voltage
When the voltage is constant, the current in the conductor is inversely proportional to the resistance of the conductor?
Keep the voltage at both ends of the conductor constant to protect the circuit
RELATED INFORMATIONS
- 1. In the experiment of exploring the relationship between the current through the resistance and the resistance value, the function of sliding rheostat is_____
- 2. 1. When moving the slide of the sliding rheostat, which two terminals will change the resistance? Which direction will the resistance increase? 2. In order to turn the bulb from dark to light, where should the slide of the sliding rheostat be placed before connecting the circuit?
- 3. What is the change of the total resistance during the movement of the sliding rheostat in the divider circuit? Tell me why
- 4. In sliding rheostat, AC, BC, BD and ad move R (resistance) and I (current) in P direction?
- 5. How to choose the connection method of sliding rheostat for measuring resistance by voltammetry?
- 6. What is the function of sliding rheostat in measuring resistance by voltammetry
- 7. Physical electricity: measuring the resistance of a small bulb, Now you don't have an ammeter. You only have a voltmeter, a sliding rheostat, a 10 ohm quantitative resistor, a 6V power supply, a switch and several wires. At this time, you can't measure the resistance of a small bulb by volt ampere method. What's the resistance of a small bulb? You need a circuit diagram,
- 8. Is a resistance and a light bulb a pure resistance circuit?
- 9. A bulb marked with "pz220-40", the normal luminous current of the lamp is a, and the resistance is a
- 10. Under the same voltage, the greater the current passing through the conductor, the smaller the resistance of the conductor. However, the resistance of the conductor has nothing to do with the voltage at both ends of the conductor and the current passing through it Two sentences are negative contradictions
- 11. What are the functions of resistance, current, voltage and relay in the circuit
- 12. The correct statement about conductor resistance is () A. Because the resistance of the conductor indicates the resistance of the conductor to the current, when there is no current in the conductor, the resistance of the conductor is zero. B. the greater the voltage at both ends of the conductor, the greater the current, so the resistance of the conductor decreases with the increase of the voltage. C. the resistance of the conductor is the property of the conductor to block the current, and its size has nothing to do with the voltage and current intensity The greater the voltage at both ends of the conductor, the greater the current, so the resistance of the conductor increases with the increase of voltage
- 13. Four practical questions on how many points to get
- 14. 4 Calculation questions Zero - half - (minus three fourths) + (minus five sixths) - two thirds |Negative two and a half | - (- 2.5) + 1 - | - 1-two and a half| 13-[26-（-21）+（-18）] [1.4-（-3.6+5.2）-4.3]-（-1.5） We need a process. Thank you
- 15. Calculation of atmospheric pressure For a pressure cooker with a diameter of 20cm, the cross section of the vent is 10mm ^ 2. If the maximum pressure of steam in the cooker is 1.7 * 10 ^ 5pa, what is the mass of the pressure limiting valve? (set the external pressure as 1 * 10 ^ 5pa)
- 16. Very simple score calculation problem Oh, help to calculate, OK One eighth multiplied by two is equal to one Twelve times three eighths is equal Eight out of twenty-five divided by four out of five equals Four fifths divided by three fifths is equal to four fifths Two divided by two thirds is equal to two Two out of eleven times eleven out of four is equal to one Four ninths divided by three fifths is equal to three fifths Five eighths divided by five twelfth equals five Half of a thirtieth divided by a quarter equals half
- 17. 1. The fruit store brought in 180 kg of fruit, sold 2 / 5 of the fruit on the first day, and sold the remaining 3 / 4 the next day. How many kg of fruit are left? 2. The school canteen bought a barrel of oil, which weighs 24 kg. The first time it used 1 / 4 of the total oil, the second time it used the remaining 1 / 3, and the third time it used 1 / 2 of the oil in the barrel. How many kg of oil is left in the barrel?
- 18. How many ohm resistor should be connected to 120 white LED lamps connected to 12 volt dry battery? The voltage will drop if there are too many
- 19. What is the resistance value of a resistor when a voltage of 10V is applied at its two ends and the current is 0.5A?
- 20. When a fixed value resistor is applied with 10V voltage at both ends, the current is 0.5A. If the voltage at both ends of the resistor is 0, what is the resistance value?