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Q1. | The stator of phase shifting transformer for use in conjunction with an ac potentiometer has a |

A. | single phase winding [Wrong Answer] |

B. | two phase winding [Correct Answer] |

C. | 3 phase winding [Wrong Answer] |

D. | either (a) or (c) [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ A uniform plane magnetic wave incident normally on a plane surface of a dielectric material is reflected and the percentage of reflected power is 75% What is VSWR?

14

1.4

15

13

⇒ The resolution of an

*n*bit DAC with a maximum input of 5 V is 5 mV. The value of

*n*is

8

9

10

11

⇒ In a bipolar junction transistor a

_{dc}= 0.98, I

_{CO}= 2 μA and 1

_{B}= 15 μA. The collector current I

_{C}is

635 mA

735 mA

835 mA

935 mA

⇒ The most commonly used devices for differencing and amplification, in control systems, are

BJT amplifiers

FET amplifiers

operational amplifiers

either (a) or (b)

⇒ In CE approximation, the upper end of d.c. load line is called the __________ point and the lower end is the __________ point.

Q, base

base, Q

saturation, cut off

cut off, saturation

⇒ In active filters inductances are divided because they

are always associated with same resistance

are bulky and unsuitable for miniaturization

are non linear

saturate quickly

⇒ For exponential function

*e*

^{-at}the Laplace transform 1/(

*s*-

*a*)

TRUE

FALSE

⇒ Current chopping leads to

over voltage

over current

both over voltage and over current

either over voltage or over current

⇒ In the given figure the reflected current wave after first reflectio

0.18 A

-0.18 A

0.3 A

-0.3 A

⇒ The '

*h*' parameters of the circuit shown in the figure are

*h*

_{ib}= 25 Ω,

*h*

_{fb}= 0.999 and

*h*

_{ob}= 10

^{-6}Ω The Voltage gai

0.99

1.98

2

4

⇒ If we need a low noise device, we should use

BJT

FET

thyristor

UJT

⇒ Temperature is analogous to

voltage

flux

charge

none of the above

⇒ The inputs to a 4 channel MUX have the following bandwidths. Channel 1-50 Hz, channel 2-200 Hz. Channel 3-75 Hz. Channel 4-90 Hz. The theoretical minimum sampling rate of the MUX is

200 Hz

400 Hz

415 Hz

1600 Hz

⇒ When a substance is repelled by a magnetic field it is known as

ferromagnetic

antiferromagnetic

diamagnetic

paramagnetic

⇒ The multiplication of two

*n*bit numbers gives a product of length less than or equal to

*n*bits

2

^{n}bits

2

*n*bits

2

^{n}- 1 bits

⇒ In a four variable K map eight adjacent cells give

single variable term

two variable term

three variable term

four variable term

⇒ Long distance short wave radio broadcasting based on

line of sight

ionospheric wave

ground wave

skywave

⇒ In AM, the modulation envelope has a peak value double the unmodulated carrier level, when the modulation is

0.25

0.33

0.5

1

⇒ The units for electrochemical equivalent are

grams

grams per coulomb

gram-coulomb

grams per ampere

⇒ If operator '

*a*' = 1 ∠120° then (1 -

*a*) =

3

3 ∠ - 30°

3 ∠ + 30°

3 ∠60°

⇒ 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

⇒ A chopper cannot be line commutated.

TRUE

FALSE

⇒ Which of the following is a disadvantage of Vestigial Sideband (VSB) system?

Low video frequencies are attenuated

Bandwidth is conserved resulting in a saving of 2 MHz per channel over DSB system

It results in a power boost of two video frequencies

It possess the advantages of both DSB and SSB system

⇒ The polar plot of G(

*j*ω) = 1/

*j*ω is

positive imaginary axis

positive real axis

negative imaginary axis

negative real axis

⇒ The circuit of figure is used to measure the value R

_{x}. Ammeter resistance R

_{a}= 0.1 Ω voltmeter resistance R

_{v}= 5000 Ω. It R

_{x1}and R

_{x2}, are the measured values of R

_{x}with switch in position 1 and 2, the mean of R

_{x1}, and R

_{x2},

9.98 Ω

10 Ω

10.04 Ω

10.1 Ω

⇒ Consider the following statements:

- In the 2's complement representation, negative numbers are stored in sign magnitude form.
- Taking 2's complement is equivalent to sign change.
- In a 4 bit complement representation of a binary number A.
- In the 2's complement representation the most significant bit (MSB) is zero for a positive number.

(I) and (III)

(I) and (IV)

(II) and (III)

(II) and (IV)

⇒ The spectrum of the white noise and an impulse function is similar in following aspects

both have similar magnitude spectrum

both have similar magnitude and Phase spectrum

no relation

similar phase spectrum

⇒ The problem of current lagging is associated with

DCTL gates

DTL gates

ECL gates

CMOS gates

⇒ Resonant circuits are used in

audio amplifiers

RF amplifiers

both audio and RF amplifiers

none of the above

⇒ While calculating Norton's resistance, all current sources are short circuited.

TRUE

FALSE