Which of the following combinations of circuit components can be used to make a tuner for a radio, to select the desired frequency?
a. fixed capacitor, variable resistor
c. fixed inductor, variable capacitor
b. fixed resistor, variable inductor
d. fixed inductor, variable resistor
C
You might also like to view...
What, other than its existence, is unusual about the magnetic field of Mercury?
What will be an ideal response?
The lamps in a string of decorative lights are connected in parallel across a constant-voltage power source. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to the lamps.)
A) The brightness of the lamps will not change appreciably. B) The other lamps get brighter equally. C) The other lamps get brighter, but some get brighter than others. D) The other lamps get dimmer equally. E) The other lamps get dimmer, but some get dimmer than others.
As a ball bounces from a floor, its acceleration off the floor between bounces is
A) significantly less than g. B) g. C) slightly more than g. D) significantly more than g.
Two thin cables, each having a diameter of d 5 t/6 and carrying tensile loads P, are bolted to the top of a rectangular steel block with cross-sectional dimensions b 3 t. The ratio of the maximum tensile to compressive stress in the block due to loads P is:
(A) 1.5
(B) 1.8
(C) 2.0
(D) 2.5
