Kirchhoff's Law

​Kirchoff's law

Multiple Choice

This is an example of a _______ circuit

• open

• series

• parallel

• square

Multiple Choice

This is an example of a _______ circuit

• open

• series

• parallel

• switch

Multiple Choice

Which factor does not affect resistivity?

• Length

• Mass

• Cross-sectional area

• Temperature

​Watch the video carefully

​Learning Objectives

I can recall Kirchhoff’s first law and understand that it is a consequence of the conservation of charge.

The sum of the magnitudes of the currents going into a junction equals the sum of the magnitudes of the currents leaving a junction.

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I₁​+I₂=I₃

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​Kirchoff's Law of Junction

The current I₁ flows into ​junction a, but I₂ and I₃ flow out from (leave) junction a.

​Total current into a junction equals total current leave a junction.

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​Some text here about the topic of discussion.

​Example

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Multiple Choice

According to Kirchoff's law of junction, the current of I₄ and its direction is ____

• 1 Ampere into the junction

• 1 Ampere out from the junction

• 3 Ampere into the junction

• 7 Ampere out from the juntion

Multiple Choice

According to Kirchoff's law of junction, the current of I₄ and its direction is ____

• 1 Ampere into the junction

• 1 Ampere out from the junction

• 3 Ampere into the junction

• 3 Ampere out from the juntion

Multiple Choice

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.

Multiple Choice

What is the KCL equation for Node A (Junction A)?

• I₁ = I₂ + I₃

• -I₁ - I₂ - I₃ = 0

• I₁ = I₂ - I₃

• I₁ = I₃-I₂