For a given linear circuit, the output voltage is 5V when an input voltage of 20V is applied to the circuit. What is the output voltage if 16V is applied to the circuit?
A. 20V
B. 4V
C. Must use Kirchhoff's laws to determine.
D. 8V
2007-10-10 09:10:06 · 8 answers · asked by humphrad 1 in Science & Mathematics ➔ Engineering
The key here is that it's a linear circuit, meaning Vo=Vi*k (k is a constant).
k = Vo1/Vi1 = 5/20 = 1/4
k = Vo2/Vi2 = 1/4
Vi2 = 16V
Therefore, Vo2 = 16*(1/4) = 4V
Answer is B
2007-10-10 10:09:06 · answer #1 · answered by noplasma 1 · 0⤊ 1⤋
Let us construct a counter example. Consider a circuit consisting of a resistor connected from the input to ground and a 5 V battery connected from the output to ground and no other components. Obviously, the output is 5 V for all inputs. Therefore the answer is C.
2007-10-10 10:38:42 · answer #2 · answered by skip 4 · 0⤊ 3⤋
Just going by your information:
20/5 = 16/x
x = 8 volts
This is the answer unless there is something else in this linear circuit.
2007-10-10 14:14:34 · answer #3 · answered by james w 5 · 0⤊ 2⤋
B since it is telling you the ckt is linear. basically it has a gain of 1/4. so Vout/Vin = 1/4 5/20 = 1/4 1 VOUT = GAIN * INPUT = 1/4*16 = 4
2007-10-10 10:53:47 · answer #4 · answered by nisaiz3000 2 · 2⤊ 0⤋
There is not enough information given to give a specific output voltage, so the correct answer is C.
.
2007-10-10 09:56:36 · answer #5 · answered by tlbs101 7 · 0⤊ 2⤋
B. 4 Volt
2007-10-10 22:20:48 · answer #6 · answered by Mohammad PCH 1 · 0⤊ 0⤋
OMG, are you asking others to do your homework for you!!
2007-10-10 15:09:28 · answer #7 · answered by Anonymous · 0⤊ 0⤋
b. 4v
2007-10-10 10:07:40 · answer #8 · answered by Anonymous · 1⤊ 0⤋