As shown in the figure, e = 10V, the internal resistance of the power supply is ignored, R1 = 4 Ω, R2 = 6 Ω, C1 = C2 = 30 micro generator. First close the switch s, and then disconnect s after the circuit is stable, and calculate the amount of electricity flowing through the resistance R1 after disconnecting s

As shown in the figure, e = 10V, the internal resistance of the power supply is ignored, R1 = 4 Ω, R2 = 6 Ω, C1 = C2 = 30 micro generator. First close the switch s, and then disconnect s after the circuit is stable, and calculate the amount of electricity flowing through the resistance R1 after disconnecting s

Close switch S (steady state): uc1 = UR2 = E / (R1 + R2) × R2 = 10V / (4 Ω + 6 Ω) × 6 Ω = 6vuc2 = 0vqc1 = C1 × uc1 = 30 × 10 ^ - 6F × 6V = 1.8 × 10 ^ - 4cqc2 = C2 × UC2 = 0C open switch s: uc1 = UC2 = 10vqc1 = C1 × uc1 = 30 × 10 ^ - 6F × 10V = 3 × 10 ^ - 4cqc2 = C2 × UC2 = 30 × 10 ^ - 6

The resistance of a toy electric vehicle is 2 ohm. When 6V voltage is applied to its two ends, the current flowing through the motor is 1a. Calculate the work done by the current passing through the motor in one minute

∵W=IU ∴6×1=6(W)

The resistance distribution as shown in the figure, ① AB resistance Rab between two points=______ If the current flowing through 4 Ω m resistance is 1a, the voltage between ab points is UAB=______ ．

C. The resistance between D points: RCD = 6 Ω × 12 Ω, 6 Ω + 12 Ω = 4 Ω, the resistance between E and f points: ref = 6 Ω × 12 Ω, 6 Ω + 12 Ω = 4 Ω, the resistance between ab points: Rab = 2 Ω + 4 Ω + 2 Ω = 8 Ω; the current flowing through 4 Ω resistance is 1a, then the voltage between C and D points: UCD = 1a × (2 Ω + 2 Ω + 4 Ω + 2 Ω + 2 Ω)

Try to use Thevenin's theorem to calculate the current I of three resistors in the circuit

 open the AB end, and let the a end be positive.  the voltage source is short circuited and the current source is open circuited, and the equivalent resistance R0 = 19 / 4 (Ω)  when the current source works alone (the voltage source is short circuited, equivalent to the wire), the current flowing through the 4 Ω resistance is 2A (the resistance with the resistance value of 4 Ω is in the main circuit), the voltage at both ends of the 4 Ω resistance is - 8V, and the direction is negative