Electrical circuits (14)

Question 1

Kirchhoff’s first circuit law

Answer 1

at a circuit junction, the sum of the currents flowing into the junction equals the sum of the currents flowing out of the junction.

Question 2

Kirchhoff’s second circuit law

Answer 2

in a closed circuit loop, the sum of the potential differences is equal to the sum of the electromotive forces.

Question 3

Potential dividers

Answer 3

simple, three-component circuits designed to control the potential difference in a circuit. They consist of a power supply; a fixed resistor; and a third resistive component, whose resistance can be fixed or variable. All of these components are connected in series and the emf of the power supply is shared across the two resistive components.