Electrical Systems

Question 1

Give the equation for ohms law

Answer 1

Voltage = Current x Resistence

Question 2

Name 3 inputs in an electrical system?

Answer 2

Light-dependent resistor
Thermistor
Switch

Question 3

What does a Light-dependent resistor do?

Answer 3

Produces an analogue signal that rises when light increases

Question 4

What does a Thermistor do and where is it used?

Answer 4

Senses temperature
- used in ovens and central heating systems and fire alarms -

Question 5

What does a Switch do and where is it used?

Answer 5

is used to interrupt the flow of electrons in a circuit

Question 6

What is a microcontroller?

Answer 6

A single board computer that is manufactured as an integrated circuit

Question 7

What is a microprocessor?

Answer 7

A computer processor

Question 8

Name 3 input devices?

Answer 8

Microwave, Mouse and a Keyboard

Question 9

Name 3 output devices?

Answer 9

Buzzers, Speakers, Monitor

Question 10

On a flow chart how many symbols are there?

Answer 10

5 symbols

Question 11

What is the role of the oval shaped symbol in a flow chart?

Answer 11

Shows the start and end

Question 12

What is the role of the parallelogram symbol in a flow chart?

Answer 12

Input and Output

Question 13

What is the role of the diamond shaped symbol in a flow chart?

Answer 13

Shows the decision

Question 14

What is the role of the rectangle symbol in a flow chart?

Answer 14

Represent the process

Question 15

What is the role of the arrow symbol in a flow chart?

Answer 15

Shows the relationship between the different symbols