A resistor is connected to an AC power supply. On this circuit, the current

A) leads the voltage by 90°.
B) lags the voltage by 90°.
C) is in phase with the voltage.
D) leads the voltage by 45°.
E) lags the voltage by 45°.


C

Physics & Space Science

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A vertically polarized beam of light of intensity 100 W/m2 passes through a polarizer with its transmission axis at 40.0° to the vertical. What is the transmitted intensity of this beam of light?

A) 100 W/m2 B) 0 W/m2 C) 25.0 W/m2 D) 44.4 W/m2 E) 58.7 W/m2

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The parallel that is a great circle is the ______________

Fill in the blank(s) with correct word

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The energy of an electron state has an uncertainty of about 0.500 eV. What is the uncertainty in the lifetime of the level?

A) 1.32 × 10-15 s B) 8.28 × 10-15 s C) 1.32 × 10-11 s D) 8.28 × 10-11 s E) 1.32 × 10-8 s

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