What is the rms current through a 2.50-mH coil due to a 110-V rms, 60-Hz source?
A) 0.94 A
B) 2.5 A
C) 104 A
D) 117 A
D
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The change in fossils at the K-T sediment layer suggests that in addition to the dinosaurs, _________ also went extinct.
Fill in the blank(s) with the appropriate word(s)
The matter field of a hydrogen atom could best be described as
A) a probability pattern. B) an electromagnetic wave. C) a cloud of photons. D) a collection of electrons.
The inductor in a radio receiver carries a current of amplitude 200 mA when a voltage of amplitude 2.40 V is across it at a frequency of 1400 kHz
What is the value of the inductance? A) 1.43 µH B) 1.36 µH C) 9.20 µH D) 4.42 µH E) 1.97 µH
Two instruments produce a beat frequency of 5 Hz. If one has a frequency of 264 Hz, what could be the frequency of the other instrument?
a. 269 Hz b. 254 Hz c. 264 Hz d. 5 Hz e. 274 Hz