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Q1. | In a synchro error detector, the output voltage is proportional to [ω(t)]^{n}, where ω(t) is the rotor velocity and n equals : |

A. | -2 [Wrong Answer] |

B. | -1 [Wrong Answer] |

C. | 1 [Correct Answer] |

D. | 2 [Wrong Answer] |

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

⇒

Match the following:

List I (Binary) | List II (Hexadecimal) | ||
---|---|---|---|

A. | 10101010 | 1. | FF |

B. | 11111111 | 2. | 88 |

C. | 10001000 | 3. | 92 |

D. | 10010010 | 4. | AA |

A-4, B-1, C-2, D-3

A-1, B-2, C-3, D-4

A-3, B-1, C-2, D-4

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

⇒ A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q = 100. If each of R, L and C is doubled from its original value, the new Q of the circuit is

25

50

100

200

⇒ Consider the following statements regarding electro-dynamometer type indicating instrum

1 and 2 are corect

3 and 4 are correct

1 and 3 are correct

1, 2, 3, 4 are correct

⇒ In an unloaded transformer, the fluxes limiting the primary and secondary are 30 mWb and 20 mWb. The coefficient of coupling is

1

0.1

0.33

0.67

⇒ The scale of dynamometer wattmeter is non linear.

TRUE

FALSE

⇒ A 400 W carrier is modulated to a depth of 75 percent. The total power in modulated wave will be

38.5 W

400 W

512.5 W

615.5 W

⇒ For a BJT if β = 50, I

_{CEO}= 3 μA and I

_{C}= 1.2 mA then I

_{E}

1 mA

1.2 mA

1.3 mA

1.4 mA

⇒ In single tone AM modulation, the transmission efficiency for

*m*= 1 is

0.333

0.5

1

0.1665

⇒ The electric breakdown strength is affected by

shape of the waveform of applied voltage

steepness of the wavefront of the applied voltage

composition of the material

all of the above

⇒ The generally used value of EHV supply in TV receivers is

1 kV per diagonal cm

1 kV per diagonal inch

0.5 kV per diagonal cm

0, 5 kV per diagonal inch

⇒ The probability giving distribution of electrons over a range of allowed energy levels is known as

Maxwell's Distribution

Fermi-Dirac Distribution

Richardson Dushman Distribution

none of the above

⇒ Capacitance hats are installed on low frequency antenna is

increase the electrical length

reduce the electrical length

protect against lightening

protect against corona effects

⇒ Which of the following element has four valence electrons?

Silicon

Germanium

Both (a) and (b) above

None of the above

⇒ In a class C power amplifier

resonant frequency of tuned circuit is equal to fundamental frequency of pulsed waveform

resonant frequency of tuned circuit is half the fundamental frequency of pulsed waveform

resonant frequency of tuned circuit has no relation to the fundamental frequency of pulsed waveform

either (b) or (c)

⇒ The response shown in figur

over damped

critically damped

under damped

either (a) or (c)

⇒ The 8085 instruction LDA FFA is an example of

Direct addressing

Register addressing

Immediate addressing

Register indirect addressing

⇒ A counter has 4 flip flops. It divides the input frequency by

4

2

8

16

⇒ In a single phase full wave regulator feeding a resistive load, the average current over one full cycle

is always zero

cannot be zero

may be sometimes zero

is always positive

⇒ Which one is digital modulation technique?

AM

PAM

PCM

None

⇒ The speed at which axial electric field due to signal advances in a TWT is equal to

speed of light

(speed of light) (helix pitch helix circumference)

(speed of light) (helix circumference helix pitch)

(speed of light) (helix pitch) (helix circumference)

⇒ In sign magnitude numbers,

the leading bit stands for the sign

the leading bit is part of the magnitude

the leading bit is always 0

the leading bit is always 1

⇒ Entropies associated with an extremely unlikely message and that with an extremely likely message are respectively

0 and 0

1 and 1

1 and 0

0 and 1

⇒ Read the following rules for scanning Boolean expressions in Pascal

- The expressions are scanned from left to right.
- The operations are scanned in the order NOT, AND, OR.
- All operators (
*i.e.,*NOT, AND and OR) are scanned together. - In one scanning all the operators of only one type are scanned.

All

1, 2 and 3 only

1, 2 and 4 only

2, 3 and 4 only

⇒ Figure represen

JFET shunt switching circuit

JFET series switching circuit

JFET analog switch

multiplexing

⇒ As regards ∈

_{0}and ∈

_{r}(absolute and relative permittivity)

both ∈

_{0}and ∈

_{r}can be interpreted in terms of atomic properties of medium

only ∈

_{r}can be interpreted in terms of atomic properties of medium

only ∈

_{0}can be interpreted in terms of atomic properties

∈

_{r}has no physical significance

⇒ The carrier frequency will be if L = 50 µH and C = 1 nF.

512

612 kHz

712 kHz

812 kHz

⇒ It is required that a strain gauge has gauge factor of 100. The proper strain gauge is

constantan strain gauge

nichrome strain gauge

semiconductor strain gauge

alloy strain gauge

⇒ A 10 bit D/A converter gives a maximum output of 10.23 V. The resolution is

10 mV

20 mV

15 mV

25 mV

⇒ A digital voltmeter has a read out range from 0 to 999 counts. If the full scale reading is 9.999 V, the resolution is

1 V

0.01 V

1 mV

1 μV

⇒ FM broadcast is used in

VHP range

UHF range

MF range

both VHP and UHF range