A long linear charge distribution of charge density 1.35 nC/m is surrounded by a concentric cylindrical surface of length 1.60 m and radius 23.6 cm. What is the magnitude of the electric field at the curved surface of the cylinder?
A. 436 N/C
B. 103 N/C
C. 51.5 N/C
D. 135 N/C
E. 0.0
B. 103 N/C
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Two solenoids of equal length are each made of 2000 turns of copper wire per meter. Solenoid I has a 5.00-cm radius; solenoid II a 10.0-cm radius. When equal currents are present in the two solenoids, the ratio of the magnitude of the magnetic field BI along the axis of solenoid I to the magnitude of 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.
(a) What is the frequency of an EM wave that has a wavelength of 1 millimeter? (b) What type of EM wave is this?
How long would it take to count all the stars in the Milky Way Galaxy at a rate of one star per second?
A) several days B) several weeks C) several years D) several thousand years E) hundreds of thousands of years
What produces a type-I supernova?
A) the collapse of the core of a massive star B) the helium flash blows apart a giant's core C) mass transfer onto a white dwarf pushing it over 1.4 solar masses D) a nova igniting a helium flash in its red giant companion E) the radioactive decay of nickel 56 into cobalt 56 into iron 56