Current is the rate of flow of electric charge
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T
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An electron enters a magnetic field of 0.75 T with a velocity perpendicular to the direction of the field. At what frequency does the electron traverse a circular path? (mel = 9.11 × 10-31 kg, e = 1.60 × 10-19 C)
A) 2.1 × 1010 Hz B) 4.8 × 10-7 Hz C) 2.1 × 1014 Hz D) 4.8 × 10-11 Hz
If a 1 050-kg car was moving at 25 m/s, what would be its kinetic energy expressed in the unusual (for kinetic energy) units of calories? (1 cal = 4.186 J)
a. 3.1E+5 b. 3.3E+5 c. 6.6E+5 d. 7.8E+4 e. 6.3E+3
A wire carrying a current that placed in a magnetic field will experience a maximum force if the angle between the direction of the current and the direction of the magnetic field is 60°
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The radiation curve is a plot of light intensity versus frequency for an incandescent source such as a glowing lamp filament. If the source of light were excited atoms in the gaseous phase, the radiation curve would look like
1) I. 2) II. 3) III. 4) IV. The plot shown in IV is of 5) monochromatic light. 6) a very bright source. 7) light that has passed through a thin slit.