A 33 mH inductor has a current going through it that is increasing at a rate of 2.3 A/s. What is the magnitude of the induced emf in this coil?
A. 33 mV
B. 76 mV
C. 13 mV
D. 95 mV
E. 2.5 V
B. 76 mV
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For the surfaced of Example Problem 7-1, where E = 0.6 ? 0.0002T and for temperatures less than 2600K, if the irradiation is decreased to 200 W/m^2, determine the temperature at which maximum net emitted heat transfer occurs.
What will be an ideal response?
Look at the four “circuits” shown in the figure below, and select those that will light the bulb
A voltage DV is applied across the ends of a Nichrome heater wire having a cross-sectional area A and length L. The same voltage is applied across the ends of a second Nichrome heater wire having a cross-sectional area A and length 2L. Which wire gets hotter?
1.The shorter wire does. 2.The longer wire does. 3.More information is needed.
What word or phrase would be a reasonable description of dark energy?
A: strong force binding. B: electromagnetic repulsion. C: weak force binding. D: attractive force. E: negative gravity