Question 159Electricity & Electronics - QMED
70% to passIf the approximate voltage to be measured in an electric circuit is not known, what should be done?
Ause the lowest voltage range on the voltmeter
Bconnect the meter in series with the circuit
Cuse the highest voltage range on the voltmeter
Donly have to calibrate the meter before using it
AI Explanation
The correct answer is C) use the highest voltage range on the voltmeter. When the approximate voltage to be measured in a circuit is unknown, it is best to start with the highest voltage range on the voltmeter. This ensures that the meter will not be damaged by a voltage that exceeds the selected range. Once the approximate voltage is determined, the range can then be adjusted to a more appropriate setting to obtain a more accurate reading. The other options are incorrect because: A) using the lowest range could potentially damage the meter, and B) connecting the meter in series would disrupt the circuit being measured.
Related Questions
Q400:What functionality do the 'MS 1' contacts of the master switch shown in the illu... Q55:With regard to the maintenance of electrical generating machines with insulated ... Q470:What will happen to the primary winding when the load increases on the secondary... Q319:Referring to figure "B" of the illustrated control circuit schematic diagram, wh... Q393:In general, what type of starter would be used to connect polyphase induction mo...
Ready to test your knowledge?
Take a Electricity & Electronics - QMED Practice ExamOfficial Resources