Answer the following statement(s) true (T) or false (F)
A light-emitting diode has the property that the potential difference between its ends is approximately 1.5 V when it conducts currents ranging from 1 mA to 50 mA. This device is ohmic.
FALSE
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Scientists once thought that Earth's primary atmosphere was composed of _____
A) hydrogen and methane B) nitrogen and oxygen C) carbon dioxide and methane D) oxygen and hydrogen
When the frequency of the source of a water wave increases, the speed of the waves traveling in the water increases
a. True b. False Indicate whether the statement is true or false
Photoelectric Effect: Monochromatic light falls on a metal surface and electrons are ejected. If the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons?
A. greater rate; same maximum energy. B. same rate; greater maximum energy. C. greater rate; greater maximum energy. D. same rate; same maximum energy.
A charged particle moves in a region of uniform magnetic field along a helical path (radius = 5.0 cm, pitch = 12 cm, period = 5.0 ms). What is the speed of this particle as it moves along this path?
A. 67 m/s B. 26 m/s C. 63 m/s D. 24 m/s E. 87 m/s