Download Winter-06-EE314-Quiz 2

EE314 Quiz#1
Winter 2005-06
Name:
Select correct answer:
1. The op amp is a high-gain amplifier that has high input resistance and low output resistance
True
False
2. An ideal op amp has an infinite output resistance, a zero input resistance, and an infinite gain.
True
False
3. For an ideal op amp, the current into each of its two input terminals is zero, and the voltage
across its input terminals is negligibly small.
True
False
4. In a noninverting amplifier, the output is a positive multiple of the input.
True
False
5. In a voltage follower, the output follows the input,
True
False
6. In a summing amplifier, the output is a positive weighted sum of the inputs.
True
False
7. In a difference amplifier, the output is proportional to the difference of the two inputs.
True
False
8. Op amp circuit cannot be cascaded without changing their input-output relationship.
True
False
9. For the circuit in Fig.1 voltage v0 is:
(a) -6V
(b) -5V
(c) -1.2V
(d) -0.2V
10k
ix
2k
_
+
+
3k
V0
_
Fig.1
10. For the circuit in Fig.1 current i0 is:
(a) 0.6mA
(b) 0.5mA
(c) 0.2mA
(d) 1/12mA
11. If vs=0 in the circuit of Fig2. current i0 is:
(a) -10 mA
(b) -2.5mA
(c) 10/12 mA
(d) 10/14 mA
8k
4k
a
10mV
_
+
+
2k
Vs
V0
_
Fig.2
12. Refer fo Fig.2. If vs=8mV voltage va is
(a) -8mV
(b) 0mV
(c) 10/3 mV
(d) 8mV
13. The power absorbed by the 4k resistor in Fig.3 is:
(a) 9mW
(b) 4mW
(c) 2mW
(d) 1mW
_
4k
+
+
6V
2k
V0
_
Fig.3