Practical Exam

Question 1

What is a DC Power device?

Answer 1

An electrical device capable of generating a constant voltage.

Question 2

What are Dual Power supplies used for?

Answer 2

Generating two constant voltages simultaneously, suitable for components requiring different DC voltage supplies.

Question 3

What is the function of a Function Generator?

Answer 3

To generate AC voltages such as sine, sawtooth, and square waveforms.

Question 4

What does a Digital Multimeter measure?

Answer 4

DC and AC voltages, currents, and resistance.

Question 5

What are Voltmeters used for?

Answer 5

To measure DC and AC voltages.

Question 6

What do Ammeters measure?

Answer 6

DC and AC currents.

Question 7

What is the purpose of an Ohmmeter?

Answer 7

To measure resistor values.

Question 8

What is a Cathode Ray Oscilloscope?

Answer 8

An instrument used to measure and display DC and AC voltages and estimate the phase differences between two AC waveforms.

Question 9

What is a prototyping board or breadboard used for?

Answer 9

A plastic board with metal connections underneath which is used to construct electronic circuits for designing and testing circuits

Question 10

What do the first two bands of a resistor’s colour code represent?

Answer 10

The first and second digits of the resistor value.

Question 11

What does the third band in a resistor’s colour code indicate?

Answer 11

The power-of-ten multiplier for the first two digits.

Question 12

What does the fourth band in a resistor’s colour code signify?

Answer 12

Resistor Tolerance

Question 13

What is the typical resistance tolerance range for modern resistors?

Answer 13

Between 1% and 5%.

Question 14

Explain resistance tolerance

Answer 14

Resistor tolerance indicates how precise the resistor value is
1kΩ resistor with a 5% tolerance can be anywhere between 950 Ω and 1050 Ω

Question 15

Fill in the blank: The colour code for Black is _______.

Answer 15

0

Question 16

Fill in the blank: The colour code for Brown is _______.

Answer 16

1

Question 17

Fill in the blank: The colour code for Red is _______.

Answer 17

2

Question 18

Fill in the blank: The colour code for Orange is _______.

Answer 18

3

Question 19

Fill in the blank: The colour code for Yellow is _______.

Answer 19

4

Question 20

Fill in the blank: The colour code for Green is _______.

Answer 20

5

Question 21

Fill in the blank: The colour code for Blue is _______.

Answer 21

6

Question 22

Fill in the blank: The colour code for Violet is _______.

Answer 22

7

Question 23

Fill in the blank: The colour code for Grey is _______.

Answer 23

8

Question 24

Fill in the blank: The colour code for White is _______.

Answer 24

9

Question 25

What is the resistor value for the colour bands Brown, Red, Red?

Answer 25

1200 = 1.2 kΩ

Question 26

What is the resistor value for the colour bands Brown, Grey, Red?

Answer 26

1800 = 1.8 kΩ

Question 27

What is the resistor value for the colour bands Orange, White, Red?

Answer 27

3900 = 3.9 kΩ

Question 28

What is the resistor value for the colour bands Yellow, Violet, Green?

Answer 28

4700000 = 4.7 MΩ

Question 29

What is the power rating of a resistor?

Answer 29

The maximum amount of power a resistor can dissipate This can stop it being damaged and overheated

Question 30

Equation of Cut-Off Frequency

Answer 30

R /(2pi L) = cut off F

Question 31

How to double/halve the cut-off frequency?

Answer 31

To double, halve the resistance or capacitance (Keep one constant) To halve, double the resistance or capacitance (Keep one constant)

Question 32

How to double/halve the voltage gain?