What is bought from an electric company?
a. Electrical energy
b. Electric charge
c. Electrical power
d. None of these
a
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For a capacitor in and ac circuit, how much energy is stored in the capacitor at the instant when current is zero?
A. 0.707 maximum B. half C. zero D. maximum
Molecular Speeds: An ideal gas is held in a container of volume V at pressure p. The rms speed of a gas molecule under these conditions is v. If now the volume and pressure are changed to 2V and 2p, the rms speed of a molecule will be
A. v/2. B. v. C. 2v. D. 4v. E. v/4.
A closed vial of gas is heated with a flame.
C. Consistent D. Inconsistent
The splitting of spectral lines in the presence of strong magnetic fields is the:
A) Doppler effect. B) Second Law of Kirchhoff. C) Zeeman effect. D) photoelectric effect. E) polarization of sunlight.