An ac generator with a total resistance of 12 ? contains 100 flat loops of wire, each with an area of 0.090 m2. The loops rotate at 60 rev/s in a magnetic field of magnitude 0.50 T. What is the maximum possible induced current?
A) 0.14 kA B) 23 A C) 46 A D) 0.28 kA
A
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In order for a color to be visible in thin film interference, the wavelength of that color must
A. Satisfy the destructive interference conditions B. Satisfy the constructive interference conditions C. Be smaller than the thickness of the film D. Be larger than the thickness of the film
Two solenoids are each made of 2 000 turns of copper wire per meter. Solenoid I is 2 m long, while solenoid II is 1 m long. When equal currents are present in the two solenoids, the ratio of the magnetic field BI along the axis of solenoid I to the magnetic field BII along the axis of solenoid II, BI/BII, is
a. 1/4. b. 1/2. c. 1. d. 2 e. 4.
If an AC circuit consists of a 220 mH inductor in series with a 75 k
resistor and an AC generator with rms voltage of 12 V. If the frequency of the generator is 25 kHz, what is the rms voltage drop across the resistor?
A. 7.0 V B. 9.4 V C. 2.6 V D. 5.0 V
Generally speaking, the larger a nucleus is, the greater its
A) stability. B) instability. C) neither stability nor instability