![](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>)
One resistor R1 is marked with "10 ohm 3A" and the other resistor R2 is marked with "50 ohm 1.5A". Now R1 and R2 are connected in parallel After connecting to the power supply, what is the maximum circuit on the trunk road?
R1 maximum voltage U1 = IR1 = 3 × 10 V = 30 V
R2 maximum voltage U2 = IR2 = 1.5 × 50 V = 75V
Therefore, after R1 and R1 are connected in parallel, the maximum voltage is equal to R1 voltage, which is u = 30V
At this time, R1 current I = 3A
R2 current I ′ = u / r2 = 30 / 50 = 0.6A
Therefore, the main current is: I + I '= 3A + 0.6A 3.6a
There are two resistors in parallel, R1 = 4 ohm, R2 = 6 ohm. If i1-1.5a is known, calculate the current of R2 and the current in the trunk circuit
There are two resistors in parallel
R1 = 4 ohm
R2 = 6 ohm
Known i1-1.5a
Find the current of R2 and the current in the trunk road
Parallel circuit u = U1 = U2
I=I1+I2
UI=I1R1=6V
U2 = 6V, R2 = 6ohm, I2 = 1A
I=I1+I2=2.5A
If a 4 ohm resistor is connected to the power supply with constant voltage, the current through the circuit is 3a. When a resistor R is connected in series to the circuit
If the current passing through the circuit is 1a, the resistance value of resistance R is
Supply voltage 3 × 4 = 12V
The resistance R is 12 △ 1 - 4 = 8 Ω
What is the difference between J and I in college physics?
If it is in electricity, I is the current. In order to distinguish it from current, j is the complex number. Another case is that J generally represents the unit vector in Y direction,
I generally represents the unit vector in X direction
RELATED INFORMATIONS
- 1. Joule to megajoule conversion How many million kilojoules is 648 million joules
- 2. The object with mass m stands still on a smooth horizontal plane and is subjected to a horizontal force from the moment t = 0. The relationship between the magnitude of the force F and the time t is shown in the figure. If the direction of the force remains unchanged, then () A. The instantaneous power at 3t0 is 5f02t0mb. The instantaneous power at 3t0 is 15f02t0mc. The average power of horizontal force is 23f02t04md from t = 0 to 3t0. The average power of horizontal force is 25f02t06m from t = 0 to 3t0
- 3. When the sliding rheostat R is adjusted and the motor is stopped, the indication of ammeter and voltmeter are 0.50a and 2.0V respectively. When R is re adjusted and the motor returns to normal operation, the indication of ammeter and voltmeter are 2.0A and 24.0V respectively. Then the output power and internal resistance of the motor are normal They are () A. 32W and 4 Ω B. 48W and 4 Ω C. 32W and 12 Ω D. 48W and 12 Ω
- 4. What about Joule Lenz's law? 1: Is Joule Lenz's law a person? 2: Joule Lenz law I read in a book that the heat generated by a circuit is directly proportional to the square of the current intensity, the resistance, and the time of the current flowing. Later, I thought, it's not quite right. First, in a circuit, of course, the larger the resistance is, the greater the heat generated, the smaller the line resistance is, the smaller the power transmission is, and the smaller the loss is. Of course, the smaller the heat generated, but on the other hand, for example, the electric furnace, The smaller the resistance of the electric furnace wire, the greater the power, and the greater the heat generated. How can it be reversed?
- 5. Physics problems about Joule's law The unit length of a wire is 0.01 Ω / m, which is now used for household circuit power supply. The resistance of the electric furnace at 100m is about 48 Ω. How much heat does the wire generate per minute? If the electric furnace is short circuited, how much heat does the wire generate per second?
- 6. Do you need to adjust the ohm to zero after measuring the resistance of 4 ohm and 5 ohm with the ohm gear of the multimeter Do you need to adjust the ohm to zero after measuring the resistance of 4 ohm and 5 ohm respectively with the ohm gear of the multimeter
- 7. A lamp is connected to the home circuit. The current passing through is 0.2A. How about the electric power of the lamp?
- 8. What is the electric power of the bulb marked with "3V 3W" when passing 0.2A current?
- 9. What kind of energy does a hair dryer turn into when it blows cold air
- 10. If you want to change the hair dryer to make the temperature of hot air higher, you should connect a resistance wire to the original resistance wire
- 11. The known resistance R = 6 Ω is connected in parallel with the unknown resistance R2, and the measured current passing through the circuit is 4a, if R1 R2 is connected in series to the same circuit, and the voltage at both ends of R2 is 6V. The power supply voltage and R2 are calculated
- 12. The resistance of a 25 watt bulb on a lighting circuit is 1936r, 1, find the voltage U? 2. If a 60 watt bulb is replaced on this circuit, what are the resistance and current of the bulb?
- 13. The resistance of a household electric soldering iron is 484 Ω. How much electric energy does it consume when it works normally for 10 minutes
- 14. The difference between Newton's view of time and space and Einstein's view of time and space
- 15. Is it right to say that Newton's mechanics is relative truth and Einstein's theory of relativity is absolute truth
- 16. Archimedes, Newton, Gauss, Euler. Who is the greatest mathematician
- 17. Archimedes, Newton and Gauss are called the three heroes of mathematics. Archimedes is called the God of mathematics. Gauss is the prince of mathematics. What is Newton?
- 18. Why Galileo is "the father of modern science", but it is Newton's classical mechanics system that marks the beginning of the era of human science?
- 19. Galileo died. Was Newton born in the same year rt
- 20. What persecution did Galileo, Copernicus and Bruno have before their new invention