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Connect two resistors of 12 and 40 ohm into the circuit. The total resistance is () ohm. When the current through 10 ohm resistor is 0.5 A, the power supply voltage is () V, the current through 40 ohm resistor is () a, and the main circuit current is () a
Reciprocal of total resistance (1 / 12 + 1 / 40)
In a circuit, the voltage is constant and the current I (a) is inversely proportional to the resistance R (Ohm)
In a circuit, the voltage is constant and the current I a is inversely proportional to the resistance R (Ω). When the resistance R = 10 Ω, the current I = 3.6 a
(1) Please write the functional relationship between current I and resistance R;
(2) When the current I = 18 A, calculate the value of resistance R
U=10x36=36
(1) The functional relationship between current I and resistance R: I = 36 / R
(2) When I = 18a, r = 36 / 18 = 2 ohm
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