Analogue Electronics 1

Question 1

What are voltage sources?

Answer 1

Voltage sources create forces that cause charge (q) to flow through the conductors and other circuit elements.

Question 2

What is conductance?

Answer 2

The reciprocal of resistance is conductance, symbolised by G.

The unit of conductance is the siemens (S)

Question 3

How to read Resistor Colour Code:

Answer 3

1. Start with the band closest to one end of the resistor. This band is the first digit of the resistance value. Do not begin with a gold or silver band.
2. The second band is the second digit of the resistance value.
3. The third band is the number of zeros following the second digit, or the multiplier.
4. The fourth band indicates the percent tolerance and is usually gold or silver.

Question 4

What is Ohm’s Law?

Answer 4

At constant temperature, the electrical current flowing through a fixed linear resistance is directly proportional to the voltage applied across it.

Question 5

What is Kirchhoff’s Current Law?

Answer 5

• The sum of the currents entering a node equals the sum of the currents leaving a node.
• A node in an electrical circuit is a point at which two or more circuit elements are joined together
• Mathematically sum Iin = sum Iout

Question 6

What is Kirchhoff’s Voltage Law?

Answer 6

• In any closed loop electrical circuit, the algebraic sum of the voltages equals zero.

Question 7

How to combine resistors in series?

Answer 7

For n resistors in series, just add all the resistance together.