Test: Fixed Bias & Emitter Bias

QUESTION: 1

Whichof the following is the correct relatioship between IB and IE?

A.
I_B = β I_E
B.
I_B = I_E
C.
I_B = (β + 1) I_E
D.
I_E = (β + 1) I_B

Solution:

For a BJT, the collector and emitter current are related as I_E = (β + 1) I_B.

QUESTION: 2

For best operation of a BJT, which region must the operating point be set at?

A.
Active region
B.
Cutoff region
C.
Saturation region
D.
None of thye mentioned

Solution:

Operating point for a BJT must always be set in the active region to ensure proper functioning. Setting up of Q-point in any other region may lead to reduced functionality.

QUESTION: 3

From the given circuit, what is the value of I_{B_Q}?

A.
47.08 mA
B.
47.08 uA
C.
50 uA
D.
0 mA

Solution:

We know that I_{B_Q} = (V_CC – V_BE)/R_B = 11.3/240 uA = 47.08 uA.

QUESTION: 4

From the given circuit, what is the value of V_{CE_Q}?

A.
7 V
B.
0.7 V
C.
6.83 V
D.
7.17 V

Solution:

V_{CE_Q} = V_CC – I_CR_C. Hence, V_{CE_Q} = 6.83 V.

QUESTION: 5

From the given circuit, what is the value of V_BC?

A.
6.13 V
B.
-6.13 V
C.
7 V
D.
-7 V

Solution:

V_BC = V_B – V_C = V_BE – V_CE = -6.13 V.

QUESTION: 6

From the given circuit, what is the value of the saturation collector current?

A.
5 mA
B.
5.45 mA
C.
4.54 mA
D.
10.9 mA

Solution:

Saturation collector current = V_CC/R_C = 5.45 mA.

QUESTION: 7

In the given circuit, what is the value of I_C?

A.
2.01 mA
B.
2.01 uA
C.
10.05 mA
D.
10.05 uA

Solution:

β I_B = 2.01 mA.

QUESTION: 8

In the given circuit, what is the value of V_CE?

A.
20 V
B.
13.97 V
C.
14.98 V
D.
None of the mentioned

Solution:

V_CE = V_CC – I_CR_C = 13.97 V.

QUESTION: 9

In the given circuit, what is the value of V_E?

A.
12.01 V
B.
1.01 V
C.
0 V
D.
2.01 V

Solution:

V_E = V_C – V_CE = 2.01 V.

QUESTION: 10

In the given circuit, what is the value of saturation collector current?

A.
10 mA
B.
8.77 mA
C.
6.67 mA
D.
None of the mentioned

Solution:

Saturation collector current = V_CC/(R_C + R_E) = 6.67 mA.

10 Questions MCQ Test Analog Circuits | Test: Fixed Bias & Emitter Bias

Whichof the following is the correct relatioship between IB and IE?

For best operation of a BJT, which region must the operating point be set at?

From the given circuit, what is the value of I_{B_Q}?

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