Engineering Board Exam Reviewer · Energy and Power · medium
A 100, resistor is rated 12 W. What is the maximum voltage that can be applied across it?
- 50 V
- 0.07 V
- 14.14 V
- 7.07 V
Answer
D. 7.07 V
Solution
P=V2/R V=sqrt(PR)=sqrt((0.5)(100))=7.07 V.
More Energy and Power questions
- A 220, resistor is rated 14 W. What is the maximum current it can carry without exceeding its rating?
- A 1500 W heater runs 4 hours a day for 30 days. At P11.50 per kWh, what is the cost?
- The source in the circuit shown is 48 V and the resistor is 12, . How much power does the source deliver?
- A 100, resistor is connected across a 10 V source. What power does it dissipate?
- A 20, resistor carries a current of 0.5 A. How much power does it dissipate?
- A resistor carries 3 A when connected to 12 V. What power does it dissipate?
- A 1000 W heater is designed for 120 V. If it is connected to 60 V (resistance unchanged), what power does it dissipate?
- A resistor dissipates 2 W when connected across a battery. A second identical resistor is connected in parallel with the first. What total…
- A series circuit has V=24 V and R1=100, , and R1 dissipates 4 W. What is R2?
- A 5 kW load is supplied through a line of total resistance 0.5, . How much power is lost in the line if the supply voltage is 230 V…