Kirchhoff's Laws

Which of the following equations represent the current I in the circuit?

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Which of the equations is valid for the circuit below?

• 2 – I₁ – 2I₂ = 0

• 2 – 2I₁ – 2I₂ – 4I₃ = 0

• 2 – I₁ – 4 – 2I₂ = 0

• I₃ – 4 – 2I₂ + 6 = 0

• 2 – I₁ – 3I₃ – 6 = 0

What is the loop rule for the outside loop?

• 8 V - I₃(4) + I₁(1) = 0

• 4 V - I₃(4) + I₁(1) = 0

• 8 V - I₃(4) - I₁(1) = 0

• 4 V - I₃(2) + I₁(1) = 0