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Q1. | A Hartley oscillator uses |

A. | a tapped inductor [Correct Answer] |

B. | a tapped capacitor [Wrong Answer] |

C. | both (a) and (b) [Wrong Answer] |

D. | neither (a) nor (b) [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ Given digits 2, 2, 3, 3, 3, 4, 4, 4, 4 how many distinct 4 digit numbers greater than 3000 can be formed?

50

51

52

54

⇒ The effective height of an antenna is slightly greater than physical height because

wave velocity in conductor is less than its velocity in free space

wave velocity in conductor is more than its velocity in free space

resistance of conductor is less than that of free space

none of the above

⇒ Consider the resonant circuit as shown b

R = 10

^{4}L = 5 μH C = 20 pF

1000 L = 50 μH C = 200 pF

10 K L = 50 μH C =20 pF

None of these

⇒ Bus bars are always meant for very heavy currents.

TRUE

FALSE

⇒ In binary data transmission DPSK is preferred to PSK because

a coherent carrier is not required to the generated at the receiver

for a given energy per bit, the probability for zero is less

the 180° phase shifts of the carrier

more protection is provided against impulse noise

⇒

**Assertion (A):** Rochelle salt and Barium titanate are both ferroelectric.

**Reason (R):** Ferroelectric materials exhibit hysteresis effect.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true but R is false

A is false but R is true

⇒ Waveguides are generally used above

20 MHz

100 MHz

200 MHz

1000 MHz

⇒ Find L

_{eq}if each L is

4/3 H

1/3 H

2/3 H

3/2 D

⇒ In a cable with ∈

*= 4, the wave velocity is*

_{r}3 x 10

^{8}m/s

0.75 x 10

^{8}m/s

1.5 x 10

^{8}m/s

10

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⇒ For a periodic waveform, the power spectral density and correlation function form

a Laplace transform pair

a Fourier transform pair

either (a) or (b)

neither (a) nor (b)

⇒ For an op-amp source follower circuit

input and output voltages have same magnitude

output and input voltages are in phase

output and input voltages are in phase but have different magnitudes

output and input voltages have same magnitude and are in phase

⇒ In amplitude modulation

the amplitude of carrier varies in accordance with the amplitude of the modulating signal.

the modulating frequency lies in the audio range

the amplitude of the carrier remains constant

the amplitude of the carrier varies in accordance with the frequency of the modulating signal.

⇒ For the polynomial

*P*(

*s*) =

*s*

^{5}+

*s*

^{4}+ 2

*s*

^{3}+ 2

*s*

^{2}+ 3

*s*+ 15 The number of roots which lie in the right half of the

*s*plane is :

4

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3

1

⇒ For parallel RLC circuit, which one of the following statements is NOT correct?

The bandwidth of the circuit deceases if R is increased

The bandwidth of the circuit remains same if L is increased

At resonance, input impedance is a real quantity

At resonance, the magnitude of input impedance attains its minimum value

⇒ N circles for a = a

_{1}, and a = a

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*n*(where

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FALSE

⇒ In a shield helix

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the spacing between adjacent turns approaches zero and wire thickness approaches zero

the spacing between adjacent turns is very large wire thickness approaches zero

⇒ In practical commercial FM system, channel bandwidth is

150 kHz

100 kHz

88 MHz

108 MHz

⇒ If RADIUS = 3.0 the result of the following FORTRAN 77 program will be

1

28.2744

18

⇒ A transistor has a maximum power dissipation of 350 mW at an ambient temperature of 25°C. If derating factor is 2 mW/°C, the maximum power dissipation for 40°C ambient temperature is

300 mW

330 mW

350 mW

380 mW

⇒ A two port network is reciprocal if and only if

Z

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_{22}

BC - AD = - 1

Y

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*h*

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*h*

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⇒ When a particular mode is excited in a waveguide, these appears an extra electric components in the direction of propagation. The resulting mode is

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Transverse magnetic

Longitudinal

Transverse Electromagnetic

⇒ Which is the dominant mode in rectangular waveguides?

TE

_{10}

TE

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TE

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TM

_{11}

⇒ High frequency oscillations can be caused by

electric coupling

magnetic coupling

ground loop

all of the above

⇒ Two phasors having rms values V

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180°

270°

360°

⇒ It is desired to reduce the reflection at an air porcelain by use of 7/4 plate (for Porcelain μ = 40, and ε

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5.039 cm

50.39 cm

0.5039 cm

0.05039 cm

⇒ The decimal equivalent of ABC

_{16}is

348

2583

2748

33

⇒ If V = 20 + j20, then log

_{e}(A) A is

3.342 +

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28.28 ∠45°

400 ∠45°

3.342 +

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⇒ Discharge breakdown in insulators is due to voids.

TRUE

FALSE

⇒

**Assertion (A):** In an R-L circuit having high inductance, the rise of current is very slow.

**Reason (R):** The time constant of R-L circuit is L/R.

Both A and R are true and R is correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is true but R is false

A is false but R is true

⇒ The rate of change of excess carrier density is proportional to carrier density.

TRUE

FALSE