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Q1. | Which one is a non-causal system? |

A. | y(n) = x(2n) [Correct Answer] |

B. | y(n) = x(n/2) [Wrong Answer] |

C. | y(n) = x(n/2) + x(n) [Wrong Answer] |

D. | all [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 circuit shown in the figure conv

BCD to Binary code

Binary to excess - 3 code

Excess - 3 to Gray

Gray to Binary

⇒ Consider the transmission line of length 37.5 cm, which is terminated into zero resistance. This line is being exited by a source of 1 GHz which has an internal impedance of 50 Ω. What is the input impedance of the line as seen by the source?

50 Ω

Zero Ω

100 Ω

Infinite Ω

⇒ In a single phase full wave regulator feeding an R-L load, the power factor angle of load is θ. The range of control of firing angle a is

0 ≤ a ≤ p

θ ≤ a ≤ p

0 ≤ a ≤ (p - θ)

θ ≤ a ≤ (p + θ)

⇒ A parallel in-parallel out shift register can be used to introduce delay in digital circuits.

TRUE

FALSE

⇒ Figure repres

Adder

Multiplier

Subtractor

Log Amplifier

⇒ The maximum rectification efficiency in case of full wave rectifier is

1

0.812

0.666

0.406

⇒ The leads in a TRIAC are denoted by

anode cathode, gate

T

_{1}T

_{2}, gate

T

_{1}, T

_{2}, anode

T

_{1}, T

_{2}, T

_{3}

⇒

Match the following:

List I (Electron spin) | List II (Phenomenon) | ||
---|---|---|---|

A. | ↑↑↑↑ | 1. | Antiferromagnetism |

B. | ↑↓↑↓ | 2. | Ferrimagnetism |

C. | ↑↓↑↓ | 3. | Ferromagnetism |

A-1, B-2, C-3

A-3, B-2, C-1

A-2, B-3, C-1

A-3, B-1, C-2

⇒ The complement of exclusive OR function is

AB + A B

AB + A B

A B + A

AB + A B

⇒ The term 'energy spectral density' is associated with

periodic waveform

non-periodic waveform

both perodic and non -perodic waveform

none of the above

⇒ Which of these commutation methods uses an auxiliary SCR?

Class A

Class B

Class C

Class D

⇒

Match the following:

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

A. | Continuous and aperiodic | 1. | Fourier representation is continuous and aperiodic |

B. | Continuous and Periodic | 2. | Fourier representation is discrete and aperiodic |

C. | Discrete and aperiodic | 3. | Fourier representation is continuous and periodic |

D. | Discrete and periodic | 4. | Fourier representation is discrete and periodic |

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

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

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

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

⇒ Δ

^{2}V = - r/E is known as __________ equation

Poisson

Fourier

Laplace

Maxwell

⇒ A lag compensator is essentially a

low pass filter

high pass filter

band pass filter

either (a) or (b)

⇒ In a series regulated power supply circuit the voltage gain of pass transistor satisfies the condition

A

_{v}→ ∞

1 << A

_{v}→ ∞

A

_{v}≈ 1

A

_{v}<< 1

⇒ Public address systems generally use electret microphones.

TRUE

FALSE

⇒ In the op-amp circuit of figure, V

_{03 V1 - 4 V2-3 V1 + 4 V23(V1 - V2)-3(V1 - V2)}

⇒ In a colour TV receiver SAW filter consists of

piezoelectric substrate on which are deposited two inter, digital transducers

photo conductive substrate which are deposited two inter digital transducers

photo voltaic substrate which are deposited two inter digital transducers

photo resistive substrate which are deposited two inter digital transducers

⇒

Match the following:

List I (Set operation) | List II (Set operator) | ||
---|---|---|---|

A. | Set equality | 1. | - |

B. | Set inclusion | 2. | = |

C. | Set intersection | 3. | < = |

D. | Set difference | 4. | ∗ |

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

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

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

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

⇒ Single parity check is not reliable in case of

paper tape

magnetic tape

magnetic drum

cores

⇒

**Assertion (A):** The forward resistance of a *p*-*n* diode is not constant.

**Reason (R):** The *v*-*i* characteristics of *p*-*n* diode is non-linear.

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

⇒ In a shunt-shunt negative feedback amplifier, as compared to the basic amplifier

both input and output impedances, decrease

input impedance decreases but output impedance increase

I/P impedance increases but O/P impedance decreases

both input and O/P impedance increases

⇒ The low pass filter characteristic shown in figure realiza

TRUE

FALSE

⇒ The polar plot for positive frequencies is shown below. The gain margi

- 8.02 dB

6.02 dB

5 dB

none of these

⇒ DeMorgan's first theorem is =

A . A = 0

A = A

A + B = A . B

AB = A + B

⇒ In figure gain bandwidth produc

200 Hz

200 MHz

200 kHz

2 MHz

⇒ Volume control found on the front panel of television receivers

a ganged resistor

a variable resistor of logarithmic type

a variable resistor of linear type

a trimmer potentiometer

⇒ It is desired to route data from many registers to one register. The device needed is

decoder

multiplexer

demultiplexer

counter

⇒ If the energy gap of a semiconductor is 1.1 eV, then it would be.

opaque to the visible light

transparent to the visible light

transparent to the ultraviolet radiation

opaque to the infrared radiation

⇒ Surface impedance at high frequencies is a consideration for

ferrites

semiconductors

good conductors

dielectrics