Kirchhoff's Law

An electrical junction has three wires A, B and C connected to it. Wire A carries 4.2 A going in, wire B carries 2.6 A going out. What does wire C carry?

• 1.6 A going in

• 1.6 A going out

• 6.8 A going in

• 6.8 A going out

Kirchhoff's 2nd law deals with

• current in circuit

• voltage in circuit

• e.m.f in circuit

• voltage in circuit and e.m.f in circuit

Kirchhoff's 1st law deals with

• current in circuit

• voltage in circuit

• e.m.f in circuit

• voltage in circuit and e.m.f in circuit

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

• 
• 
• 
• 
• 

Consider the circuit shown in the figure below.

a) Apply Kirchhoff’s law to 𝑙𝑜𝑜𝑝 1 to find the current 𝑖₁.

b) Apply Kirchhoff’s law to 𝑙𝑜𝑜𝑝 2 to find the current 𝑖₂.

c) Find the current i₃.

• a) i₁ = -1/2A

  b) i₂ = -1/3A

  c) i₃ = -5/6 A

• a) i₁ = -3/2A

  b) i₂ = -1/3A

  c) i₃ = -5/6 A

• a) i₁ = -1/2A

  b) i₂ = -1/3A

  c) i₃ = -1/6 A

• a) i₁ = -1/3A

  b) i₂ = -1/2A

  c) i₃ = -5/6 A

"The sum of all voltage drops in a series circuit equals the total applied voltage." This is know as what?

• Ohm's Law

• Kirchhoff's Voltage Law

• Kirchhoff's Current Law

• Bolen's Law

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

Kirchhoff's loop rule is a statement of _____.

• the law of conservation of momentum.

• the law of conservation of charge.

• the law of conservation of energy.

• the law of conservation of ohms.

Kirchhoff's junction rule is a statement of ______

• the law of conservation of momentum.

• the law of conservation of energy.

• the law of conservation of charge.

• the law of ohms.