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
Q221:How is the power dissipated as heat in a direct current circuit calculated? ... Q332:What is the shape of the schematic symbol for an operational amplifier used in a... Q282:Which of the waveshapes shown in the illustration is termed a ramp or sawtooth w... Q246:In DC motor construction, where are the commutating windings wound? Q437:What can cause the pitting or welding of controller contacts?
Ready to test your knowledge?
Take a Electricity & Electronics - QMED Practice ExamOfficial Resources