A simple circuit consists only of of a 1.0-?F capacitor and a 15-mH coil in series. At what frequency will this circuit oscillate?
A) 15 kHz
B) 1.3 kHz
C) 0.77 kHz
D) 67 Hz
B
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Using a capacitor and two different value resistors, which of the following combinations in an RC circuit would give the greatest time constant?
a. the capacitor in series with both resistors in series with each other b. the capacitor in series with both resistors in parallel with each other c. the capacitor in series with the higher value resistor d. the capacitor in series with the lower value resistor
Life in the subsurface ocean of Europa will most likely consist of
A) creatures similar to seals and penguins which enter the ocean through holes in the icy crust B) plants on the ocean floor C) simple single-celled organisms D) fish and other complex aquatic organisms
The current in a long wire creates a magnetic field in the region around the wire. How is the strength of the field at distance r from the wire's center related to the magnitude of the field?
a. field directly proportional to r c. field directly proportional to r2 b. field inversely proportional to r2 d. field inversely proportional to r
The diagram exaggerates the sizes of Earth and the Sun relative to the orbit. If Earth were correctly scaled relative to the orbit in the figure, how big would it be?
A) about half the size shown B) about 2 millimeters across C) about 0.1 millimeter across D) microscopic