Question 142Electricity/Electronics - QMED70% to pass
If a digital multimeter is set up as shown in figures "A" and "B" of the illustration, what is the status of the silicon diode if the display reads OL ohms when configured as in figure "A" and reads OL ohms when configured as in figure "B"? Illustration EL-0211
AI Explanation
The correct answer is D) the diode is open.
When a digital multimeter is set up to measure resistance (configured as in figures "A" and "B" of the illustration), an open diode will display "OL" (overload) in both configurations. This is because an open diode presents an infinite resistance, which the multimeter cannot measure accurately.
The other answer choices are incorrect:
A) is incorrect because an intermittently open diode would not consistently display "OL" in both configurations.
B) is incorrect because a shorted diode would display a very low resistance, not "OL".
C) is incorrect because an open diode is not functioning properly.
Related Questions
#140 What should be done with a capacitor that is obviously discolored due to excessive heat? #141 If a digital multimeter is set up as shown in figures "A" and "B" to test a silicon diode, what is the status of the diode if the screen displays OL V when configured as in figure "A" and displays OL V when configured as in figure "B"? Illustration EL-0212 #143 As shown in the illustration, what maintenance would be required of the circuit components? Illustration EL-0058 #144 If the centrifugal switch or relay used for cutting out the starting winding of a split- phase induction motor fails to open once the motor is in operation, what will be the result? #145 A single-phase capacitor-start induction motor starts, comes up to about 75% rated speed, slows down to a lower speed, and accelerates again. Where is the problem most likely to be?