Question 85Electricity & Electronics - QMED
70% to passWhich of the following conditions would most likely lead to the failure of a resistor due to overheating?
AResistor wattage rating one-half that required for the circuit.
BResistor wattage rating two times higher than that required for the circuit.
CResistor wattage rating four times higher than that required for the circuit.
DResistor wattage rating equal to that required for the circuit.
AI Explanation
The correct answer is A) Resistor wattage rating one-half that required for the circuit. This is because if the resistor wattage rating is one-half of what is required for the circuit, the resistor will be subjected to excessive power dissipation, leading to overheating and potential failure. The other options (B, C, and D) would not lead to overheating and failure, as the resistor wattage rating would be sufficient or even higher than required for the circuit.
Related Questions
Q@q.QuestionNumber:What is the combined effect of inductive reactance, capacitive reactance, and re... Q@q.QuestionNumber:What is the name of the component labeled Q1 as shown in section "D" of the regu... Q@q.QuestionNumber:The characteristics of the device shown in figure "8" of the illustration includ... Q@q.QuestionNumber:In order to take a current reading with a 'clamp-on' ammeter, what should be the... Q@q.QuestionNumber:Under normal conditions, storage batteries used for starting the emergency diese...
Ready to test your knowledge?
Take a Electricity & Electronics - QMED Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App