Lecture 4

Question 1

What is Kirchhoff’s Current Law (KCL)?

Answer 1

The sum of currents entering a node is equal to the sum of currents leaving that node.

Question 2

What is Kirchhoff’s Voltage Law (KVL)?

Answer 2

The sum of voltage drops around any closed path (loop) must be equal to zero.

Question 3

List the steps for nodal analysis.

Answer 3

1. Identify nodes with three or more branches
2. Select a reference node (ground)
3. Apply KCL to non-reference nodes
4. Solve simultaneous equations
5. Determine currents in each branch

Question 4

How to check if a resistor is suitable for use in a circuit?

Answer 4

Calculate the power using P=I²R and compare it to the resistor’s power rating.

Question 5

What is the formula for voltage divider?

Answer 5

V₁=Vᵢₙ x (R₁/R₁+R₂)

Question 6

What is the formula for current divider?

Answer 6

I₁=Iᵢₙ x (R₁/R₁+R₂)