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Q1. | An electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis is |

A. | synchro control transformer [Wrong Answer] |

B. | LVDT [Wrong Answer] |

C. | stepper motor [Correct Answer] |

D. | tacho generator [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ The action of backward wave oscillator is similar to that of

klystron amplifier

reflex klystron oscillator

TWT

magnetron

⇒ E

_{G}for silicon is 1.12 eV and that for germanium is 0.72 eV. Therefore it can be concluded that

more number of electron-hole pairs will be generated in silicon than in germanium at room temperature

less number of electron hole pairs will be generated in silicon than in germanium at room temperature

equal number of electron-hole pairs will be generated in both at lower temperatures

equal number of electron-hole pairs will be generated in both at higher temperatures

⇒ At

*t*= ∞; V

_{R2}and V

_{C}wil

4, 4

2, 4

0, 2

2, 0

⇒ A microcomputer has a 64 K memory. What is the hexadecimal notation for the first memory location?

0

FFFF

0FFF

3FFF

⇒

**Assertion (A):** A series RLC circuit resonates when excited by variable frequency source.

**Reason (R):** Resonant frequency is geometric mean of half power frequencies.

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

⇒ In the given figure the circuits for input impedance of a microwave device with output ports match terminated. The devic

E plane tee

H plane tee

magic tee

hybrid ring

⇒ An audio signal is band limited to 4 kHz. It is sampled at 8 kHz. What will be the spectrum of the sampled signal?

-4 kHz to 4 kHz

-8 kHz to 8 kHz

every 4n kHz repeating

every ± 8 kHz and operating as well as at zero (k integer)

⇒ A system has 12 poles or 2 zeros. Its high frequency asymptote in its magnitude plot has slope of

-200 dB/decade

-240 dB/decade

-280 dB/decade

-320 dB/decade

⇒ A multiple emitter transistor has many emitters and collectors.

TRUE

FALSE

⇒ For F

_{1}layer the maximum ionic density is 2.3 x 10

^{4}electrons per cc. The critical frequency for this layer will be

1.36 MHz

13.6 MHz

136 MHz

1360 MHz

⇒ If V = 4 in the figure, the value of I

_{s}is give

0.25

5/2 A

0

none

⇒ A communication channel with AWGN operating at a signal to noise ratio SNR >> 1 and bandwidth B has capacity C

_{1}. If the SNR is doubled keeping B constant, the resulting capacity C

_{2}is given by

C

_{2}≈ 2C

_{1}

C

_{2}≈ C

_{1}+ B

C

_{2}≈ C

_{1}+ 2B

C

_{2}≈ C

_{1}+ 0.3B

⇒ Z

_{L}= 200 Ω and it is desired that Z

_{i}= 50 Ω The quarter wave transformer should have a characteristic impedance of

100 Ω

40 Ω

10000 Ω

4 Ω

⇒ In a single phase semi-converter the number of thyristors is

16

8

4

2

⇒ Consider a Binary Symmetric Channel (BSC) with probability of error being

*p*. To transmit a bit, say 1, we transmit a sequence of three 1 s. The receiver will interpret the received sequence to represent 1 if at least two bits are 1. The probability that the transmitted bit will be received in error is

*p*

^{3}+ 3

*p*

^{2}(1 -

*p*)

*p*

^{3}

(1 -

*p*)

^{3}

*p*

^{3}+

*p*

^{2}(1 -

*p*)

⇒ In a ratio detector

the linearity is worse than in a phase discriminator

the output is twice that obtainable from a similar phase discriminator

stabilization against signal strength variations is provided

the circuit is the same as in a discriminator, except that the diodes are reversed

⇒ In an ac coordinate potentiometer, the currents inphase and quadrature potentiometer are adjusted to be

out of phase by 90°

in phase

out of phase by 45°

out of phase 180°

⇒ An RLC series circuit has R = 7.07 Ω, L = .707 H and C = 7.07 μF. At Half power frequencies the circuit impedance is likely to be

7.07 Ω

10 Ω

14.14 Ω

20 Ω

⇒ If the characteristic equation is (λ + 1) (λ + 2) (λ + 3) = 0, the eigen values are

-1, -2, -3

1, 2, 3

0, 1, 2

0, 2, 3

⇒ A series circuit has R = 5 Ω and C = 10 μF. At

*t*= 0 it is switched on to a 10 V dc battery. The maximum current in the circuit is

0.0833333333333333

0.0416666666666667

10

^{6}A

10 μA

⇒ Signal flow graph is used to find :

stability of the system

controllability of the system

transfer function of the system

poles of the system

⇒ The noise figure of klystron amplifier is about

25 dB

3 dB

zero

1 dB

⇒ The resistance of a metallic wire would

increase as the operating frequency increase

decrease as the operating frequency increase

remain unaffected on increasing the operating frequency

first increase then decrease

⇒ (62)

_{10}in binary system is

110000

111100

111110

111111

⇒ For a plane good conductor, skin depth varies

directly as square root of permeability

directly as square root of frequency

inversely as permittivity

inversely as square root of conductivity

⇒ Which of the following uses a capacitor in the feedback path?

Active low pass filter

Active high pass filter

Both (a) or (b)

Neither (a) nor (b)

⇒ In an ac network the sum of currents entering a node is 10 ∠45°. The sum of currents leaving the node is

19.32 ∠45°

15 ∠45°

20 ∠45°

zero

⇒ For a current transformer, the standard secondary rating is

1 A or 5 A

2.5 A

0.416666666666667

5 A or 10 A

⇒ The force in a magnetic field is given by F =

*qv*B

F and

*q*are perpendicular and

*v*and B are perpendicular

F and

*q*only are perpendicular to each other

F and

*v*, F and B are mutually perpendicular to each other and

*v*and B at any angle between them

All the four components are perpendicular to each other

⇒ For the logic circuit given, what is the simplified Boolean funct

X = AB + C

X = BC + A

X = AB + AC

X = AC + B