The above figure consists of schematic diagram of three resistors connected in s

Question

The above figure consists of schematic diagram of three resistors connected in series with a DC power supply of 12 volts with a return path to the negative terminal of the power supply also connected to ground.

The first resistor is labeled ?R1?, which is equal to 220 Ohms. The second resistor is labeled ?R2? with unknown resistance value. The third resistor is labeled ?R3? with unknown resistance value.

Resistor 1 which runs horizontally across the top of the circuit has label ?R1? with a resistor value of ?4 k Ohms?. Resistor 2 which runs vertically across the right side of the circuit has label ?R2? with voltage drop value of 7.0 V. Resistor 3 which runs horizontally across the bottom of the circuit has label ?R3? with voltage drop value of 7.0 V. The circuit is grounded at the negative lead of the power supply.

what is the current in the circuit?

Explanation / Answer

Solution:

Applying Krichoffs voltage Law

12 = 220 * I + 7 + 2.5

2.5 = 220 *I

I = 0.0113 = 11.3 mA

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