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The setting resistor R1 is connected in series with R2, R1 is 12 ohm, and the power supply voltage is 9V. After the switch is closed, the current indication is 0.5A, and the power is on for 5min Find out the four electrical physical quantities related to the resistance R2?
R2 resistance is 6 ohm, R2 minute voltage is 3 V, R2 electric power is 1.5 watts, power consumption is 450 joules in 5 minutes
In the circuit as shown in the figure, the resistance values of R1, R2 and R3 are all 4 Ω. The power supply voltage is 6V and remains constant to calculate the current flowing through the resistance R1 when the switch is open and closed
What are the flows? A 0-r1 | = | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -|
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\ r2|=|
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b 0_______ r3|=|____ _ |__________ |
As shown in the picture
Don't answer
The figure is not very clear. If there is a knife switch in the middle, the current of R1 when closing = 6 divided by 8 = 0.75a. When the knife switch is off, the current of R1 = 6 divided by 12 = 0.5A
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