An atom that has lost an electron is called an ion
a. True
b. False
Indicate whether the statement is true or false
True
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A series LR circuit includes a 9.0 V battery, a resistance of 0.20 
and an inductor. When the switch is closed, the circuit exhibits a time constant of 200 ms. What is the inductance of the circuit?
A. 42 mH B. 15 mH C. 32 mH D. 40 mH E. 22 mH
The mass of an oxygen molecule is 16 times that of a hydrogen molecule. At room temperature, the ratio of the rms speed of an oxygen molecule to that of a hydrogen molecule is:
A. 16 B. 4 C. 1 D. 1/4 E. 1/16
Compared to the entire electromagnetic spectrum, visible light is ________.
A. the least energetic B. the most energetic C. a small fraction of the possible wavelengths of light D. the most valuable to astronomers E. the fastest moving
For the two resistors shown in the figure below, rank the currents at points a through f from largest to smallest