In a series RLC ac circuit, a second resistor is connected in parallel with the resistor previously in the circuit. As a result of this change, what happens to the impedance of the circuit?
A) It does not change.
B) It decreases.
C) It decreases for frequencies below resonance and increases for frequencies above resonance.
D) It increases.
E) It increases for frequencies below resonance and decreases for frequencies above resonance.
B
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Indicate whether the statement is true or false
The rear window in a car is approximately a rectangle, 2.1 m wide and 0.45 m high. The inside rearview mirror is 0.55 m from the driver's eyes, and 1.70 m from the rear window.
a) What is the minimum length for the rearview mirror if the driver is to be able to see the entire width and height of the rear window in the mirror without moving her head? b) What is the minimum height for the rearview mirror if the driver is to be able to see the entire width and height of the rear window in the mirror without moving her head?
A parallel plate capacitor with plate separation of 4.0 cm has a plate area of 4.0 × 10-2 m2. What is the capacitance of this capacitor with air between these plates?
A) 8.9 × 10-11 F B) 8.9 × 10-12 F C) 8.9 × 10-13 F D) 8.9 × 10-14 F E) 8.9 × 10-15 F