# For a forward biased photodiode , increasing the incident light intensity causes the diode current to

1.  Increase

2.  Decrease

3.  Remain constant

4.  Remain constant, diode voltage drop increases

5.  27, 189

6.  108, 108

7.  1514, 162

8.  81, 189

8

27, 189

Explanation :
No Explanation available for this question

# A high Q tuned circuit in a tuned amplifier permits it to have high

1.  Selectivity

2.  Fidelity

3.  Sensitivity

4.  Frequency range

4

Selectivity

Explanation :
No Explanation available for this question

# Due to illustration the change in electron and hole concentration for a heavily doped n type semiconductor is and .If n is the intrinsic concentration

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# An oscillator is basically an amplifier with

1.  Zero gain

2.  Very large gain

3.  Infinite gain

4.  Very low gain

4

Infinite gain

Explanation :
No Explanation available for this question

# In a feedback oscillator, constant amplitude oscillation are obtained when loop gain –Aβ equals

1.  0

2.  -1

3.  +1

4.  ∞

4

+1

Explanation :
No Explanation available for this question

# 3dB bandwidth (Hz) of a parallel tuned circuits equals

1.  √2(f0/Q0)

2.  2(f0/Q0)

3.  (Q0 f0)/2

4.  (f0/Q0)

4

(f0/Q0)

Explanation :
No Explanation available for this question

# In tuned collector oscillator, angular frequency of oscillation ω equals Where ω0 is frequency of series resonance of L and C

1.  ω0

2.  ω0√1+hoeR

3.  ω0√1-hoeR

4.  ω0√1-hoe.R

5.

5

ω0√1+hoeR

Explanation :
No Explanation available for this question

# In FET Hartley oscillator, frequency of oscillation ω is Where ω0=frequency of series resonance of L1, L2 & C

1.  ≈ ω0

2.

3.  >> ω0

4.  ω0 (L1/L2)

5.  504

6.  536

7.  544

8.  548

8

548

Explanation :
No Explanation available for this question

# Intensity of a laser beam does not decrease with distance in accordance with the inverse square law because the laser light

1.  Is monochromatic

2.  Is very intense

3.  Is very directional

4.  Obeys Planks law

4

Is very directional

Explanation :
No Explanation available for this question

# Population inversion refers

1.  Population of the ionized state is Maximum

2.  Population of the lower state is Maximum

3.  Population of the lower level is more than that of the higher level

4.  Population of the Higher level is more than that of the lower level

4