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Q1. | A logical expression Y = A + AB is equal to |

A. | Y = AB [Wrong Answer] |

B. | Y = AB [Wrong Answer] |

C. | Y = A + B [Wrong Answer] |

D. | Y = A + B [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 :**

⇒ In a CE amplifier the ac cut off voltage is 9 V and slope of ac load line is - 0.5 mA/V. The ac saturation current is

9 mA

4.5 mA

3 mA

18 mA

⇒

**Assertion (A):** A *p-n* junction is used as rectifier.

**Reason (R):** A *p-n* junction has low resistance in forward direction and high resistance in reverse direction.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not a correct explanation of A

A is true but R is false

A is false but R is true

⇒ The polar plot of P (

*j*ω) = 45° as ω varies from -∞ to ∞ is

a straight line parallel to

*x*-axis

a straight line parallel to

*y*-axis

a line passing through origin and inclined at 45°

a line in first quadrant passing through origin and inclined at 45° to positive

*x*-axis

⇒

**Assertion (A):** In design of circuit using BJT, a derating factor is used.

**Reason (R):** As the ambient temperature increases, heat dissipation becomes slower.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not a correct explanation of A

A is true but R is false

A is false but R is true

⇒ A heavily doped semiconductor exhibits a __________ such a device is called sensistors.

negative temperature coefficient of resistance

positive temperature coefficient of resistance till a particular value of temperature and then it shown negative temperature coefficient of resistance

positive temperature coefficient of resistance

none of the above

⇒ The Z-inverse of the given Z-transform is _______

unit step

unit ramp

unit impulse

unit parabola

⇒ Consider the following statements about an array in Pascal

- An array has a fixed predetermined number of components.
- Any component of an array can be accessed using an index.
- An array variable name refers to a group of quantities by a single name.
- When array variables are used an appropriate declaration is required.

All

1, 2, 3 only

2, 3, 4 only

1, 2 and 4 only

⇒

Match the following:

List I (Functional components) | List II (Device) | ||
---|---|---|---|

A. | Error detector | 1. | Three phase FHP Induction motor |

B. | Servo motor | 2. | Synchro transmitter and control transformer |

C. | Amplifier | 3. | Tacho generator |

D. | Feed back | 4. | Armature controlled FHP dc motor |

5. | Amplidyne |

A-2, B-4, C-1, D-5

A-4, B-2, C-5, D-3

A-2, B-4, C-5, D-3

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

⇒ Three resistance of 15 Ω each are connected in delta. The resistance of equivalent star will have a value of

15 Ω

5 Ω

5/3 Ω

45 Ω

⇒ Accumulator is an 8 bit register and is also known as register B.

TRUE

FALSE

⇒ A voltage V(

*t*) which is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt

^{2}is measured by a true rms meter. The reading will be

0

4

2

16

⇒ The most commonly used microphone for public address systems is

carbon

crystal

moving coil

condenser

⇒ As per Boolean algebra, inputs can be interchanged in

OR gates

AND gates

both OR and AND gates

none of the above

⇒ Radar antennas are

dipoles

helical

parabolic

conical

⇒ Which control action is also called rate control?

Proportional

Derivative

Integral

Proportional plus integral

⇒ In the below figure the rms voltage across each half of secondary is 200 V. The peak inverse voltage across each of thyristor

200 V

2(200) V

2(400) V

800 V

⇒ A dynamometer wattmeter is connected in ac circuit. The measured power is

rms power

average power

peak power

instantaneous power

⇒

Match the following:

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

A. | Ternary | 1. | 0, 1, 3 |

B. | Quaternary | 2. | 0, 1, 2, 3, 4, 5, 6 7, 8, 9, A, B |

C. | Quinary | 3. | 0, 1, 2, 3, 4 |

D. | Duodecimal | 4. | 0, 1, 2 |

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

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

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

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

⇒ A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be

0.5 A

more than 0.5 A

less than 0.5 A

0.5 A or less

⇒ The gate-source voltage that reduces the drain current to approximately zero is called

gate-source on voltage

gate-source voltage

pinch-off voltage

gate-source cut-off voltage

⇒ Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

TTL

CMOS

ECL

TTLLS

⇒ Consider a baseband binary PAM receiver shown below. The additive channel noise

*n*(

*t*) is whit with power spectral density S

_{N}(

*f*) = N

_{0}/2 = 10

^{-20}W/Hz. The low-pass filter is ideal with unity gain and cutoff frequency 1 MHz. Let Y

_{k}represent the random variable

*y*(

*t*

10

1.414 x 10

2 x 10

_{k}10^{10}10

^{7}1.414 x 10

^{-10}2 x 10

^{-20}

⇒ A DC voltage source is connected across a series R - L - C circuit. Under steady-state conditions, the applied DC voltage drops entirely across the

R only

C only

L only

R and L combination

⇒ An ac wave with superimposed dc is symmetrical about

TRUE

FALSE

⇒ In a BCD to 7 segment decoder the minimum and maximum number of outputs active at any time is

2 and 7

3 and 7

1 and 6

3 and 6

⇒ For the design of a sequential circuit having 9 states, minimum number of memory elements required is

3

4

5

9

⇒ In radar systems PRF stands for

Power Return Factor

Pulse Return Factor

Pulse Repetition Frequency

Pulse Response Factor

⇒ Figure shows a pole zero plot of I(

⇒

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

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

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

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

⇒ Find V

⇒ A DC voltage source is connected across a series R - L - C circuit. Under steady-state conditions, the applied DC voltage drops entirely across the

R only

C only

L only

R and L combination

⇒ An ac wave with superimposed dc is symmetrical about

*x*- axis.TRUE

FALSE

⇒ In a BCD to 7 segment decoder the minimum and maximum number of outputs active at any time is

2 and 7

3 and 7

1 and 6

3 and 6

⇒ For the design of a sequential circuit having 9 states, minimum number of memory elements required is

3

4

5

9

⇒ In radar systems PRF stands for

Power Return Factor

Pulse Return Factor

Pulse Repetition Frequency

Pulse Response Factor

⇒ Figure shows a pole zero plot of I(

*s*). The likely current response in time domai*i*(*t*) =*e*^{-1}-*e*^{-3t}*i*(*t*) =*e*^{-1}- 2*e*^{-2t}*i*(*t*) =*e*^{-1}-*e*^{-2t}*i*(*t*) =*e*^{-1}-*e*^{-4t}⇒

Match the following:

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

A. | CLP | 1. | Measure of μP clock speed |

B. | SHELL | 2. | Double sided double density |

C. | DSDD | 3. | Allows you to specify file as command processor |

D. | Megahertz | 4. | Microcode stored in ROM |

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

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

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

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

⇒ Find V

_{x}V_{y}V_{zVx = -6 Vy = 3 Vz = -3Vx = -6 Vy = -3 Vz = 1Vx = 6 Vy = 3 Vz = 3Vx = 6 Vy = 1 Vz = 3}