Q4) In reference to the diagram of question 3, to measure surrent through resist
ID: 1871728 • Letter: Q
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Q4) In reference to the diagram of question 3, to measure surrent through resistor 3 (R3), you will i DMM in current measuring mode has a very low resistance. Putting it in parallel to any ) DMM in current measuring mode has a very high resistance. Putting it in parallel to any never put your DMM (in current measuring mode) in position 4. Can you explain why? resistor will divert most of the current to flow through the DMM instead of the resistor and give incorrect current reading. resistor will divert most of the current to flow through the DMM instead of the resistor and give incorrect current reading DMM in current measuring mode has a very high resistance. Putting it in parallel to any resistor will divert most of the current to flow through the resistor instead of the DMM and give incorrect current reading. ill) Q5) In reference to the diagram of question 3, to measure voltage across resistor 3 (R3), you will never put your DMM (in voltage measuring mode) in position 3. Can you explain why? To measure voltage accurately, the DMM needs to be in parallel to any circuit element (in this case R3) i) i) To measure voltage accurately, the DMM needs to be in series to any circuit element (in this ii) None of the above. case R3) Q5) In the following diagram, assume R1-R2 R3-100 Ohms. The equivalent resistance of the circuit is 33.33 Ohms. Now if you are given another resistor of 100 Ohms and are requested to decrease the equivalent resistance of the circuit, in which position will you place the new resistor? i) Position 1 ii) Position 2 ili) Position 3 iv) Position 4 R3Explanation / Answer
Q4) i) DMM in current measuring mode should be in series with resistor R3. Because the current that pass through the resistor R3 should also pass through DMM. Basically, DMM should be put in position 3 not in position 4.
Q5 i) Position 3 is the correct position for voltage measurement.
Q6 iv) Whenever resistors are combined in parallel the equivalent resistance decreases while exactly opposite happens in the case of series combination.
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