Module 2

Question 1

5 Suffixs and their 10^n numbers

Answer 1

Milli = 10^-3
Micro= 10^-6

Kilo = 10^3
Mega = 10^6
Giga = 10^9

Question 2

Battery: what they made of
Why plus and minus terminals
Two types
Type of current coming out of batteries

Answer 2

Combination of cells

Potential difference across terminals

Primary battery: non rechargeable

Secondary battery: rechargeable

Batteries produce DC

Question 3

Equation for power

Answer 3

Power = Voltage * Current

P = V * I

Question 4

Ohms Law

Answer 4

Voltage = Current * Resistance
V = I * R

Question 5

Series vs parallel circuits

Answer 5

Series: C = C1 = C2
V = V1 + V2

Parallel: C = C1 + C2
V = V1 = V2

Question 6

Technical differences between analogue and digital signals

Pros and cons of digital signal

Converting between the two

Answer 6

Analogue: constantly changing in amplitude and frequency
Digital: finite values at specific sampling intervals

Better at overcoming noise, requires computer and software

Analogue to digital converter: ADC
Digital to analogue converter: DAC

Question 7

Mains frequency
Human hearing range
Audio communication range
Range of RF signals

Answer 7

Mains = 50Hz

Human range = 20Hz - 15,000Hz

Audio range = 300Hz - 3000Hz

Radio range = 30kHz - beyond 3000 MHz