D.C Circuits

Question 1

Kirchoff’s first law :

Answer 1

🔹It states that the sum of currents entering a junction always equals the sum of currents leaving the junction.

🔹The law is about the conservation of charge.

Question 2

What is a junction?

Answer 2

🔹is a point where at least 3 paths meet.

Question 3

What is a branch?

Answer 3

🔹Branch is a path connecting two junctions.

Question 4

Kirchoff’s second law:

Answer 4

🔹The sum of the EMF in a closed circuit equals the sum of the potential differences (across all resistors)

🔹This law is about the conservation of energy.

Question 5

What is an Electromotive Force (emf) ?

Answer 5

🔹The electromotive force is the amount of chemical energy being converted electrical energy per coulomb of charge when a charge passes through a power supply.

🔹(Energy transformed per unit charge)

🔹Is the potential difference across the cell when no current is flowing through it.