Chapter 10 - Electrical Circuits

Question 1

What is Kirchhoff’s First Law?

Answer 1

Kirchhoff’s First Law is that the sum of current entering a point is the same as the sum of the current leaving that point: It uses the conservation of charge.

Question 2

What is Kirchhoff’s Second Law?

Answer 2

Question 3

Describe current around a series circuit.

Answer 3

Current is the same at any point in a series loop.

Question 4

For a series loop, what is true of potential difference around components, with greater resistance.

Answer 4

The greater the resistance of a component, in a series loop, the greater the potential difference around that component.

Question 5

What is the law of current relating to branches in a parallel circuit.

Answer 5

Question 6

What is the law of potential difference relating to branches in a parallel circuit.

Answer 6

Question 7

What is the law of resistor relating to being in series?

Answer 7

Question 8

What is the law of resistors relating to branches in a parallel circuit.

Answer 8

Question 9

State the equation of electromotive force, including “lost volts”.

Answer 9

Question 10

How would and I-V graph look for instances of a cell with internal resistance?

Answer 10

Y-intercept = ε (electromotive force)

Gradient = -r (internal resistance)

Question 11

What is the potential divider equation?

Answer 11