Measuring Equipemnt

Question 1

What are electrical currents measured by?

Answer 1

Ammeter, connected normally in series

Question 2

What are voltages measured by?

Answer 2

Voltmeter, must be connected across 2 points which the voltage is to be measured

Question 3

Will a voltmeter effect the circuit it is measuring ?

Answer 3

Yes , it has some resistance so should be treated like a resistor

Question 4

What are the disadvantages of an analogue meter?

Answer 4

Can be inaccurate typically more than 10%

Low meter resistance can result in inaccurate measurements

Parallax effect can affect accuracy

Question 5

What do conversion circuits do?

Answer 5

Convert measured input to a value which can be converted by the ADC

Question 6

What do analogue digital convertors do?

Answer 6

Convert sampled analogue signal to a form a suitable for the display

Question 7

What is an oscilloscope ?

Answer 7

Capable of displaying a visual representation of a wave formation