# In delta connected circuit when one resistor is open, the power will be

1.  0

2.  increased by the factor of 3

3.  Reduced by the factor of 3

4.   Unchanged

4

Reduced by the factor of 3

Explanation :
No Explanation available for this question

# Maximum swing of signals occurs when Q point of a BJT along load line is selected at

2.  saturation point

3.  cut off point

4.  Does not depend on Q point location on load line

4

Explanation :
No Explanation available for this question

1.  Stability in the gain of the amplifier

2.  Instability in the gain of the amplifier

3.  Decrease in the gain of the amplifier

4.  None of these

4

Instability in the gain of the amplifier

Explanation :
No Explanation available for this question

# 1. In star connection line current is equal to phase current 2. In delta connection line voltage is equal to phase voltage For a given phase connected to the particular line which of the statement is true

1.  Only 1

2.  Only 2

3.  Both 1 and 2

4.  None of these

4

Both 1 and 2

Explanation :
No Explanation available for this question

# De-sensitivity of a feedback amplifier is

1.  D=1/(1+Aβ)

2.  D=1/β

3.  D=1+Aβ

4.  D=Aβ

4

D=1+Aβ

Explanation :
No Explanation available for this question

# The emitter region in a BJT is more heavily doped than the base region so that

1.  Base Current is low

2.  Base Current is low

3.  cut off point

4.  Doesnot depend on Q point location on load line

4

Doesnot depend on Q point location on load line

Explanation :
No Explanation available for this question

# Three identical impedances are connected to a 3-phase supply of 400V line current is34.65A and total power taken is 14.4kW. The resistance of load in

1.  20

2.  16

3.  12

4.  10

4

12

Explanation :
No Explanation available for this question

# Input impedance of amplifier with a negative voltage series feedback is

1.  More compared to its impedance without feedback

2.  Less compared to its impedance without feedback

3.  Same with its impedance without feedback

4.  None of these

4

More compared to its impedance without feedback

Explanation :
No Explanation available for this question

# For balanced star load, if unbalanced line currents are Ia, Ib, Ic equal to –j10, -j10 and –j20 respectively, the neutral current will be equal to

1.  8.66+j5

2.  8.66-j5

3.  -8.66-j5

4.  -9.66+j5

4

8.66+j5

Explanation :
No Explanation available for this question

# The common region in a BJT is more heavily doped than that of base region so that

1.  Monotonically increases with IC

2.  Monotonically decreases with IC

3.  Increases with Ic low Ic reaches peak and then decreases with futher increase in IC

4.  Not a function of Ic

4