Needed: Adjustable DC power supply, VOM, DMIN, Oscilloscope, Start Time: leads f

Question

Needed: Adjustable DC power supply, VOM, DMIN, Oscilloscope, Start Time: leads for each, supplied thru-hole resistor with color bands Show work for all calculations in nearby white space luse arrows 1) What is the resistor nominal value and tolerance (per the color bands) Stop Time: Ceolors) Bra (nominal value) 5k 2) What power does the resistor appear capable of? 9.165h 3) Based upon the resistor value and tolerance, what are the calculated minimum and maximum (tolerance) 9 resistance values for the resistor? (min) (max) 4) Resistor value (per the VOM)show the instructor before wiring below 5) Resistor value (per the DMM) 6) Calculate the voltage needed, based upon the above DMM resistance value, to obtain a current of 8.50mA (rounded appropriately) 7) Calculate the expected power dissipation of the resistor when connected 8) Is the expected power dissipation within the resistor power rating? Connect the résistor to the power supply and adjust its voltage until the DMM reads a current of as close as possible to 8.50mA. Leaving the voltage adjustment as-is and connecting leads as needed. 9) What is the current value as shown by the DMM? 10) What is the voltage shown by the power supply? 11) What is the mean voltage as measured by the Oscilloscope? 12)Now connecting the VOM to measure voltage, what is the voltage? and did any -- of the other values on the DMM or Oscilloscope change as a result/why? (Stop and show the instructor your setup) 13)What is the voltage as measured by the DMN? 14)Now connecting the VOM to measure current what is the current? and did the DMM voltage change/why? (Stop and show instructor your setup) ELT130 Lab Practical 1 ver. B 2017 Fall/ Mellen

Explanation / Answer

Answer :- 3) As per the calculated resistance value we have, R = 1500 ohm with tolerance of 5 %.

Thus minimum resistance value = 1500x(1 – 0.05) ohm = 1425 ohm.

And the maximum value is = 1500x(1 + 0.05) ohm = 1575 ohm.

NOTE :- Rest questions can be answered using DMM and VOM, i.e. practical values.

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