Assume that the values for V and R are known. What other information is needed to calculate the voltage drop across the speaker?
A - The resistance of the speaker's internal circuitry.
B - The duration of the discharge between the wire and the cylinder.
C - The current flowing through the resistor.
D - No other information is required.
Kaplan's Explanation:
The circuit diagram indicates that the resistor and speaker are wired in parallel. Therefore, the voltage across the resistor is the same as the voltage across the speaker. We can calculate the voltage across the resistor using V = IR. The only additional information we need is the value of I, the current flowing through the resistor.
(A) Distortion.We need to know the current through the speaker, as well as its internal resistance, to determine the voltage across the speaker. The resistance alone is insufficient.
(B) Distortion.The duration of the discharge would not provide us with any useful information. If we knew the charge transmitted and the duration, we could calculate the current. The duration alone is insufficient.
(D) Distortion.Other information is required, as described above.
I said A, because you can find I via V = IR, IF you know the internal resistance to find the resistance of the parallel resistors. Their answer doesn't seem right to me. Any thoughts or help? Something I didn't see? Thanks!
A - The resistance of the speaker's internal circuitry.
B - The duration of the discharge between the wire and the cylinder.
C - The current flowing through the resistor.
D - No other information is required.
Kaplan's Explanation:
The circuit diagram indicates that the resistor and speaker are wired in parallel. Therefore, the voltage across the resistor is the same as the voltage across the speaker. We can calculate the voltage across the resistor using V = IR. The only additional information we need is the value of I, the current flowing through the resistor.
(A) Distortion.We need to know the current through the speaker, as well as its internal resistance, to determine the voltage across the speaker. The resistance alone is insufficient.
(B) Distortion.The duration of the discharge would not provide us with any useful information. If we knew the charge transmitted and the duration, we could calculate the current. The duration alone is insufficient.
(D) Distortion.Other information is required, as described above.
I said A, because you can find I via V = IR, IF you know the internal resistance to find the resistance of the parallel resistors. Their answer doesn't seem right to me. Any thoughts or help? Something I didn't see? Thanks!