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Q1. | The minimum number of 2 input NAND gates required to implement Boolean function A B C is A, B, C are available is |

A. | 2 [Wrong Answer] |

B. | 3 [Wrong Answer] |

C. | 5 [Correct Answer] |

D. | 6 [Wrong Answer] |

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

⇒ Drift velocity of electrons is generally less than 1 mm/s.

TRUE

FALSE

⇒ A voltage wave containing 10% third harmonic is applied to a scries R-L circuit. The percentage third harmonic content in the current wave will be

more than 10%

10% or less than 10%

less than 10%

10% or more or less

⇒ A dipole antenna was radiating with some excitation in free space radiating a certain amount of the power. If this antenna is immersed in a lake where water is non-dissipative but has a dielectric constant of 81, the radiated power with the same excitation will

decrease to finite non-zero value

remain the same

increase

decrease to zero

⇒ In a plate modulated class C amplifier, the peak supply voltage is V. The maximum plate-cathode voltage can be

1 V

1.5 V

2.5 V

4 V

⇒ The integral of a unit impulse is unit step function.

TRUE

FALSE

⇒ A speech signal, band limited to 4kHz and peak voltage varying between + 5V and - 5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits. Assuming the signal to be uniformly distributed between its peak values, the signal to noise ratio at the quantizer output is

156 dB

32 dB

48 dB

64 dB

⇒ Friction forces acts in a direction

opposite to that of velocity

same as that of velocity

at right angle to that of velocity

partly opposite and partly at right angle to the direction of velocity

⇒ The p mode of operation of magnetron signifies that

the phase difference between adjacent anode poles is p radians

the phase difference between adjacent anode poles is a multiple of p radians

the total phase shift around the periphery is p radians

none of the above

⇒ The function in the given figure can be writte

*u*(

*t*- 1) sin p (

*t*- 1) -

*u*(

*t*- 3) sin p (

*t*- 3) +

*u*(

*t*- 4) sin p (

*t*- 4) -

*u*(

*t*- 6) sin p (

*t*- 6)

*u*(

*t*- 1) sin p (

*t*- 1) -

*u*(

*t*- 3) sin p (

*t*- 3) +

*u*(

*t*- 4) sin p (

*t*- 4)

*u*(

*t*- 1) sin p (

*t*- 1) +

*u*(

*t*- 4) sin p (

*t*- 4)

*u*(

*t*- 1) sin 2p (

*t*- 1) +

*u*(

*t*- 4) sin 2p (

*t*- 4)

⇒ A virtual ground is a ground for

voltage

current

both voltage and current

voltage but not for current

⇒ Mc Murray full bridge inverter uses

4 thyristors and 2 diodes

4 thyristors and 4 diodes

8 thyristors and 4 diodes

8 thyristors and 8 diodes

⇒ ROC of sequence

*x*[

*n*] = δ[

*n*] is

Not exist

*z*= 0

Entire Plane

Entire Plane expect

*z*= 0,

*z*= ∞

⇒ The network

First order system and the pole

Second order system of the two poles are

Second order system of the poles is

none of the above

⇒ High speed counter

ring counter

ripple counter

synchronous counter

asynchronous counter

⇒ In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include

antenna replacement and feed correction

amplitude timing and phase correction

polarization shifting and code diversity

path diversity and frequency diversity

⇒ Calculate the stability factor and change in I

_{C}from 25°C to 100°C for, β = 50, R

_{B}/ R

_{E}= 250, ΔI

_{C0}= 19.9 nA for emitter bias configuration.

42.53, 0.85 μA

40.91, 0.58 μA

40.91, 0.58 μA

41.10, 0.39 μA

⇒ Electric dipole moment is expressed in debye unit.

TRUE

FALSE

⇒ Which of the following frequencies cannot be used for reliable beyond-the-horizon terrestrial communications without repeaters?

25 kHz

15 MHz

750 MHz

12 GHz

⇒ Binary number 11001 is equivalent to decimal number

35

15

105

25

⇒ Which of the following logic family is fastest of all?

TTL

RTL

DCTL

ECL

⇒ When a single phase dual converter is operating in circulating current mode

both converters are working as rectifiers simultaneously

one converter is always working as rectifier and the other as inverter

only one converter is working at one time

both converters are either working as rectifiers or as inverters simultaneously

⇒ How many interrupts are there in 8085 microprocessor?

4

5

6

8

⇒ In the circuit of figure, the load current when thyristor is

is constant

increases exponentially

decreases exponentially

zero

⇒

**Assertion (A):** It is possible that a digital circuit gives the same output for different input voltages

**Reason (R):** A digital circuit is also called logic circuit.

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

⇒ Panel type instruments are used in

power stations

automobiles

industries

all of the above

⇒ In telephone, the dial tone has a frequency of

5 Hz

15 Hz

33 Hz

233 Hz

⇒ Find R

_{L}for maximum power tran

3 Ω

1.125 Ω

4.17 Ω

none

⇒ In a megger the moving coil meter has a permanent magnet.

TRUE

FALSE

⇒ Consider the following statements

- The amplitude of an FM wave is constant
- FM is more immune to noise than AM
- FM broadcasts operate in upper VHF and UHF frequency ranges
- FM transmitting and receiving equipments are simpler as compared to AM transmitting and receiving equipments

1, 2, 3, 4

1, 2, 3

2, 3, 4

1, 3, 4

⇒ A two port network is reciprocal if and only if

Z

_{11}= Z

_{22}

BC - AD = - 1

Y

_{12}= Y

_{21}

*h*

_{12}=

*h*

_{21}