Question: A(A + B) =
[A].A
A B
AB
AB
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Electronics And Communication Engineering
A two branch parallel tuned circuit has 100 Ω resistance and 0.1 H inductance in one branch and 10-6 F capacitor in the other. At resonance frequency, the dynamic resistance is
Question: A two branch parallel tuned circuit has 100 Ω resistance and 0.1 H inductance in one branch and 10-6 F capacitor in the other. At resonance frequency, the dynamic resistance is
[A].10 Ω
100 Ω
1000 Ω
10000 Ω
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
Dynamic resistance =
A transistor amplifier is operating in class A mode. If a transformer is connected for impedance matching, the efficiency will
Question: A transistor amplifier is operating in class A mode. If a transformer is connected for impedance matching, the efficiency will
[A].increase
decrease
not be affected
increase or decrease
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
A + AB =
Question: A + AB =
[A].A
A
A + B
A + B
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
In figure, the magnitude of V
Question: In figure, the magnitude of V
[A].must be more than that of Va
must be more than that of Vb
must be more than that of Va or Vb
can be equal to or less than or more than that of Va or Vb
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
V depends on magnitudes and phase angles of Va and Vb.
A (A + B) =
Question: A (A + B) =
[A].A
B
A
B
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
In figure, the current I4 is
Question: In figure, the current I4 is
[A].10 ∠0
5 ∠90°
5 ∠270°
10 ∠90°
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
I4 = I1 + I2 + I3
or I4 = 5∠90° + 5∠0 + 5∠180° = 5∠90°.
If the midband gain of an amplifier is 40 dB, the gain at half power frequency is
Question: If the midband gain of an amplifier is 40 dB, the gain at half power frequency is
[A].37 dB
30 dB
20 dB
13 dB
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
Half power frequency is -3 dB frequency.
Inputs A and B of the given figure are applied to a NAND gate. The output is LOW
Question: Inputs A and B of the given figure are applied to a NAND gate. The output is LOW
[A].from 0 to 6
from 0 to 2
from 0 to 1 and 2 to 3
from 1 to 2 and 3 to 4
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
NAND gate gives Low output if all inputs are High. For other combinations of inputs, output is High.
Consider the following statements:The bias stability of an emitter-bias amplifier circuit improves by
Question: Consider the following statements:The bias stability of an emitter-bias amplifier circuit improves by
[A].1 and 2
2 and 3
3 and 4
4 and 5
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.