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Q1. | In the television system in India, the odd and even fields are scanned |

A. | 25 times each [Wrong Answer] |

B. | 25 times each but alternately [Correct Answer] |

C. | 50 times each [Wrong Answer] |

D. | 50 times each but alternately [Wrong Answer] |

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

⇒

Match the following:

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

A. | Wein bridge oscillator | 1. | Low output impedance |

B. | Voltage shunt feedback amplifier | 2. | RF frequency range |

C. | Crystal oscillator | 3. | Audio frequency range |

D. | Current shunt feedback amplifier | 4. | High input impedance |

5. | High output impedance |

A-3, B-1, C-2, D-5

A-3, B-5, C-1, D-2

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

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

⇒ Which one of the following is applicable to any network-linear or non-linear, active or passive, time-varying or invariant - as long as Kirchhoff laws are

*not*violated?

Tellegen's theorem

Reciprocity theorem

Maximum power transfer theorem

Superposition theorem

⇒ Find equivalent capacitance if each capacitance is

56 F

6/5 F

6/10 F

5/12 F

⇒ Which is correct with respect to computer memory?

Only a particular address can have a particular memory

Any address can have any memory

To read a word from computer memory, it is not necessary to specify a location

None of the above

⇒ Electric dipole moment is expressed in debye unit.

TRUE

FALSE

⇒ Without any addition circuitry, an 8:1 MUX can be used to obtain.

some but not all Boolean functions of 3 variables

all functions of 3 variables but none of 4 variables

all functions of 3 variables and some but not all of 4 variables

all functions of 4 variables

⇒

Match the following:

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

A. | p type semiconductor | 1. | silicon |

B. | n type semiconductor | 2. | holes are majority carriers |

C. | Intrinsic semiconductor | 3. | electrons are majority carriers |

D. | Tungsten | 4. | is a metal |

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

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

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

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

⇒ For a given line voltage, four heating coils will produce maximum heat when connected

all in parallel

all in series

with two parallel pairs in series

one pair in parallel with the other two in series

⇒ A series circuit has R = 5 Ω and C = 10 μF. It is switched on to a 12 V dc battery at

*t*= 0. The current in the circuit will be maximum

at

*t*= RC

at

*t*= ∞

at

*t*= 0

^{+}

none of the above

⇒ In the circuit, shown in figure, V

_{0}= V

_{i}. The values of 1,

*m*,

*n*are: (

*x*represents don't care conditi

0, 1, 1

∞, x, x

x, ∞, x

0, x, ∞

⇒ The chip 8257 is a

programmable interrupt controller

programmable DMA controller

programmable peripheral interface

none of the above

⇒ In log magnitude Bode diagram the slope of high frequency asymptote of (1 +

*j*ωT) is

20 dB per decade

10 dB per decade

20 dB per octave

10 dB per octave

⇒ In the graph shown in the figure, for the tree with branches

*b*,

*d*and

*f*the fundamental loops would inclu

*abf, def, bdea*

*bdc, def, fba*

*abde, def, cdb*

*cea, bdea, abbf*

⇒ Which of the following oscillator is not in FM?

Crystal oscillator

Hartley oscillator

Colpitts oscillator

All of the above

⇒ Which of the following devices has the 'negative resistance' characteristic?

Reflex klystron

Gunn diode

P-N-P transistor

Magnetron

⇒ A class A transformer coupled power amplifier is to deliver 10 W output. The power rating of transistor should not be less than

5 W

10 W

20 W

40 W

⇒ Watthour meter is an integrating instrument

TRUE

FALSE

⇒ The resistance R

_{AB}in the circui

10 Ω

12 Ω

9 Ω

3 Ω

⇒ Consider the following statements

- The sign of a floating point number depends on the sign of mantissa only.
- If the absolute value of a number is less than 1, the sign of exponent is zero or positive.
- With sign bit of mantissa as 0, increasing the exponent from a positive to a more positive value gives a larger floating point number.

All

1 and 2 only

1 and 3 only

2 and 3 only

⇒ Consider the following statements about mutual inductances:

- The value should remain constant under all conditions.
- The mutual inductance should not vary with temperature.
- The inductance should be independent of excitation.
- They have two coils wound on a bobbin of hard magnetic material, coils being separated by a range.

2, 3, 4

1, 2, 3

1, 3, 4

1, 2, 4

⇒ A circuit which cannot demodulate SSB is

balanced modulator

product detector

BFO

phase discriminator

⇒ The expression H

_{Z}= C cos(B

*x*) cos(A

*y*)

*yz*is for

TE wave

TM waves

both TE and TM waves

some TE and some TM waves

⇒ Unit of e is __________ .

coulomb/newton-metre

coulomb

^{2}/newton-metre

Farad/metre

Farad

^{2}/metre

⇒ Twelve resistance each 2 ohm are connected to form a cube, one resistance being in each arm of cube. The resistance between any two diagonally opposite comers is

1 Ω

2 Ω

4 Ω

8 Ω

⇒ A periodic voltage

*v*(

*t*) = 1 + 4 sin ω

*t*+ 2 cos ω

*t*is applied across a 1 ohm resistance. The power dissipated is

1 W

11 W

21 W

24.5 W

⇒

**Assertion (A):** ECL is fast as compared to TTL.

**Reason (R):** ECL dissipates less power than TTL.

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 true, R is false

A is false, R is true

⇒ Steady state conditions are considered to be achieved in

*R-L*circuits at the end of __________ time constant.

one

two

four

five

⇒ The reverse saturation current depends on the reverse bias.

TRUE

FALSE

⇒ A 16 bit binary adder has

16 half adders

16 full adders

one half adders and 15 full adders

8 half adders and eight full adders

⇒ The response to sinusoidal excitation can be found by

settings

*s*=

*j*ω in the network function

settings

*s*= -

*j*ω in the network function

taking inverse transform of network function

none of the above