If an AC circuit consists of a 220 mH inductor in series with a 75 k
resistor and an AC generator with rms voltage of 12 V. If the frequency of the generator is 25 kHz, what is the rms voltage drop across the inductor?
A. 7.0 V
B. 2.6 V
C. 9.4 V
D. 5.0 V
D. 5.0 V
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To be dimensionally consistent, velocity [L/T], acceleration 
and time [T] must be related as follows.
a. 
b. 
c. 
d. 
A parallel plate capacitor is charged to voltage V and then disconnected from the battery. Leopold says that the voltage will decrease if the plates are pulled apart. Gerhardt says that the voltage will remain the same. Which one, if either, is correct, and why?
A. Gerhardt, because the maximum voltage is determined by the battery. B. Gerhardt, because the charge per unit area on the plates does not change. C. Leopold, because charge is transferred from one plate to the other when the plates are separated. D. Leopold, because the force each plate exerts on the other decreases when the plates are pulled apart. E. Neither, because the voltage increases when the plates are pulled apart.
The calculation of electron energy levels in the hydrogen atom was done first by
a. Schrödinger. b. de Broglie. c. Bohr. d. Heisenberg.
You can choose between a heat pump and an electric heater to heat your house. If you assume that the electric heater is 100% efficient at turning electrical energy into heat, an electric heat pump of what coefficient of performance (COP) will result in the same cost of electricity for the same amount of heating? Assume that the motor that runs the heat pump is 100% efficient
1.0.25 2.0.5 3.1.0 4.2.0