When the voltage at both ends of the conductor is 6V, the current passing through it is 0.6A, and the resistance is 10 ohm. If the voltage at both ends of the conductor is 3V, what is the current and resistance of the conductor

When the voltage at both ends of the conductor is 6V, the current passing through it is 0.6A, and the resistance is 10 ohm. If the voltage at both ends of the conductor is 3V, what is the current and resistance of the conductor

The resistance of the conductor is a fixed value, which is the inherent property of the conductor itself. In general, it does not change with the change of external conditions. Therefore, the resistance of the conductor is still 10 ohm. Increase the voltage of 3 volts, that is, the voltage at both ends of the conductor is 9 volts. According to the formula, voltage = current * resistance, the current can be 0.9 amperes
What is the resistance of 100 meters 120 square copper cable?
Resistivity × cable length / cable cross section = cable DC resistance;
0.0172×100÷120＝0.01433 Ω
Lighting circuit voltage is 220 V, for the human body, under normal circumstances, the voltage below 36 V is safe, when the current through the human body is equal to 1 mA, it will cause numbness
When the current passing through the human body is "greater than" 30mA, it is dangerous to life. According to the above data, the resistance of the human body is estimated to be about 1.5k Ω. "Generally speaking, the voltage below 36V is safe for the human body." that's right. For special occasions, such as the 24 V DC in the electroplating workshop, it is not safe even if the human body is not well protected, Another example is that the voltage of human surgical instruments is generally not more than 12V
1. The resistance of the human body is different from each other. The degree of the back of the fingers is different. In winter and summer, it is also different. That is to say, the farmers and clerks of the fingers are different from day to day. Ordinary people can also measure 100k-500k. For example, before measuring the magnification of the triode, the resistance between the tongue and fingers is estimated to be 100k; the conductivity of smooth muscle and skin
When the voltage at both ends of a conductor resistance is 6V, the current passing through it is 0.3A, then the resistance value of the conductor resistance is (); when the voltage at both ends of the conductor is changed to 9V, the current passing through it is 0.45a; when there is no voltage at both ends of the conductor, the current passing through the conductor is (), then the conductor resistance is
R = u / I = 6 / 0.3 = 20 Ω
When there is no voltage at both ends of the conductor, the current through the conductor is (0), and the conductor resistance is 20 Ω
20 0
What is the DC resistance of 95 square wires
Two "220 V, 80 W" bulbs are connected in parallel in 220 V voltage. What is the voltage of two lamps? What is the current passing through them? What is the electric power of each lamp?
Because the two lamps are connected in parallel, the voltage is 220 v. because the rated voltage is 220, the current is equal to 80 / 220 = 0.36 a, and the power is naturally 80 W
When the voltage at both ends of a section of conductor is 2V, the current in the conductor is 0.5A. If the voltage increases to 3V, what is the current in the conductor
When the voltage at both ends of a conductor is 2V, the current in the conductor is 0.5A. If the voltage increases to 3V, how much does the current in the conductor become?
[Note: there are two circuit diagrams in this problem
Fig
Known:
Ask for:
Solution:
Another method:
Known: U1 = 2V, I1 = 0.5A, U2 = 3V
Ask: I2
I1/I2=U1/U2
0.5A/I2=2V/3V
2V*I2=0.5A*3V
I2=1.5A/2V=0.75A.
A: the current in the conductor becomes 0.75a
Known: U1 = 2V, I1 = 0.5A, U2 = 3V
Ask: I2
R = U1 / I1 = 4 Ω I2 = U2 / r = 0.75a
Given I = u / R, the resistance is equal to 1 ohm
So when the voltage is 3V, I = 1 / 3a
How many catties of copper can be produced by a 300 meter cable? How many catties of copper can be produced by a 240 meter cable? How many catties of copper can be produced by a 150 meter cable? How many catties of copper can be produced by a 120 meter cable?
Calculate the weight of copper has a clear calculation method, you do not give points, who told you!
What is the total wattage of household appliances with 220 V voltage?
Theoretically, it can be very large. In fact, the power capacity is the limit
When the voltage at both ends of a conductor is 3V, the current in the conductor is 0.5A. If the voltage increases to 6V, how much is the current in the conductor? If the voltage decreases to 1.5V, how much is the current and resistance?
It is known that: U1 = 3V, I1 = 0.5A, U2 = 6V, U3 = 1.5V, find: I2, I3 and r. ∵ I = ur, ∵ conductor resistance R = u1i1 = 3v0.5a = 6 Ω; conductor resistance is determined by material, length and cross-sectional area of conductor, and has nothing to do with conductor voltage. When the voltage at both ends of conductor changes, conductor resistance remains 6 Ω. When the voltage is 6V, current I2 = u2r = 6v6 Ω = 1A; when the voltage is 1.5V, current I3 = u3r = 1.5V 6 Ω = 0.25A; a: current and resistance are 1a, 0.25A and 6 Ω respectively