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Q1. | A bipolar transistor is a __________ controlled devices whereas a FET is a __________ controlled devices. |

A. | current, voltage [Correct Answer] |

B. | current, current [Wrong Answer] |

C. | voltage, current [Wrong Answer] |

D. | voltage, voltage [Wrong Answer] |

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

⇒ The filter circuit for feeding tweeter has

an inductance in series and a capacitance in parallel

a capacitance in series and an inductance in parallel

a resistance in series and a capacitance in parallel

a capacitance in series and a resistance in parallel

⇒ In FORTRAN 77 IFIX (-73.2) gives the value

73

-73

-7

-73.2

⇒ As the diameter of a wire is doubled, the resistance becomes

twice

one half

one fourth

four times

⇒ For a periodic signal with finite number of discontinuities in each period, at isolated points of discontinuity the series converges to __________ .

difference value of signal on either side of discontinuity

highest value of signal on either side of discontinuity

average value of signal on either side of discontinuity

sum of value of signal on either side of discontinuity

⇒ Two resistances are R

_{1}= 36 ± 5% and R

_{2}= 75 ± 5%. If they are connected in parallel, the limiting error in percent will be

0.05

0.1

0.15

0.2

⇒ 2's complement of (-24) =

11101000

1001000

1111111

111111

⇒ An audio signal of FM radio station is sampled at a rate of 15% above the Nyquist rate. Signal is sampled in 512 levels and bandwidth of the signal is 4 KHz. The minimum bandwidth required to transmit this signal will be

77 K bits/sec

92 K bits/sec

84.8 K bits/sec

82.8 K bits/sec

⇒ The phase velocity of an EM wave propagating in a hollow metallic rectangular waveguide in the TE

_{10}mode is

equal to its group velocity

less than the velocity of light in free space

equal to the velocity of light in free space

greater than the velocity of light in free space

⇒

**Assertion (A):** Temperature control of the passenger compartment of car uses both feed forward and feedback controls.

**Reason (R):** Feed forward control gives corrective action before the disturbance affects the output and feedback control applies corrective action after output changes.

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

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

A is correct but R is wrong

R is correct but A is wrong

⇒ The damping ratio of a pair of complex poles when expressed in terms of angle θ measured from

*j*ω axis equal to

sin θ

cos θ

tan θ

cot θ

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | Poles and zeros of lie an real axis driving point LC network | 1. | lie an real axis |

B. | Canonic LC network has | 2. | a zero |

C. | The number of Canonic networks for the given driving point function | 3. | minimum number of elements |

D. | The first critical frequency nearest the origin for RL driving point impedance | 4. | four |

5. | minimum number of elements | ||

6. | alternate | ||

7. | either a pole or zero | ||

8. | three |

A-1, B-5, C-8, D-7

A-6, B-5, C-3, D-2

A-1, B-5, C-4, D-2

A-1, B-3, C-4, D-7

⇒ If ω

_{0}is the angular frequency of rotation of electron in the absence of magnetic field, the angular frequency ω, when a magnetic field B is acting is ω ≅ ω

_{0}+ (

*e*/2

*m*)B.

TRUE

FALSE

⇒ A sinusoidal current having peak value of 7.07 A is superimposed on dc of 5A. If a hot-wire ammeter is used to measure the combined current in the circuit, it will indicate __________ ampere.

7.07

10

12.07

2.07

⇒ In the following non-planar graph no.of independent loop equations

8

12

7

5

⇒ If E

_{y}is the voltage applied to Y plates, the vertical deflection of beam is proportional to

E

_{y}

E

_{y}

E

_{y}

^{1.5}

E

_{y}

^{2}

⇒ The typical squelch circuit

cuts off IF amplifier when AGC is minimum

cuts off IF amplifier when AGC is maximum

cuts off audio amplifier when carrier is absent

eliminates RF interference when signal is weak

⇒ Oscillations are obtained from a reflex klystron only for combinations of anode voltage and repeller voltage that give a favourable transit time.

TRUE

FALSE

⇒ Which statement out of the following statement is wrong?

Attenuation of satellite signals by rain and fog varies almost inversely with the angle of elevation

At 12/4, GHz link frequencies, signal power loss due to rain and fog is much greater than at 4/6 GHz frequencies

The distance between satellite and Earth station varies slightly with angle of elevation

At present 4/6 GHz geostationary satellites are being parked in geosynchronous, orbits at least 10° apart

⇒ An electrodynamometer instrument has the advantage of

freedom from hysteresis and eddy currents because air cored coils are used

freedom from hysteresis and eddy currents because cores of coils have special ferromagnetic material

high torque/weight ratio

low cost

⇒ A square current wave of magnitude 1 A is applied to an element for 5 seconds. The voltage across the element rises linearly from 0 to final value linearly. The element is

resistance

inductance

capacitance

R and C in series

⇒ A capacitor does not allow sudden changes

in currents

in voltage

in both current and voltage

neither of two

⇒ The emission of light is LED due to

emission of holes

emission of electrons

generation of electromagnetic radiations

conversion of heat energy into illumination

⇒ In high frequency region, an amplifier behaves like a

band pass filter

low pass filter

high pass filter

any of the above

⇒ For an elliptically polarized wave incident on the interface of a dielectric at the Brewster angle the reflected wave will be

elliptically polarized

linearly polarized

right circularly polarized

left circularly polarized

⇒ The attraction between the nucleus and valence electron of copper atom is

zero

weak

strong

either zero or strong

⇒ In a series RLC circuit, the current at resonance is I

_{0}the total energy stored in the circuit at resonance is

LI

_{0}

^{2}

2 LI

_{0}

^{2}

2 LI

_{0}

^{2}

0.5 LI

^{2}

⇒ As per Matthiessen's rule, the total resistivity r of a conductor can be written as r = r

_{i}+

*a*T, where r

_{i}and

*a*are constants and T is absolute temperature. At very low temperatures

*a*T = 0

*a*T > r

_{i}

*a*T ∼ r

_{i}

*a*T < r

_{i}

⇒ An XOR gate with 6 variables is as follows A ⊕ B ⊕ C ⊕ D ⊕ E ⊕ F. The number of minterms in the Boolean expression is

6

12

64

32

⇒ The range of life time carriers (electrons and holes) is

1 μ

*s*to 100 μ

*s*

1 nano sec to 1 μ

*s*

1 nano sec to hundreds of μ

*s*

none of the above

⇒ The peak factor is

rms value/peak value

rms value/average value

peak value/rms value

peak to peak value/rms value