Q1. | An m derived low pass filter has f_{c} = 1000 Hz and m = 0.6. This filter will have infinite attenuation at |

A. | f = 1250 Hz [Correct Answer] |

B. | all frequencies above 1000 Hz [Wrong Answer] |

C. | f = 1562.5 Hz [Wrong Answer] |

D. | f = 1666.67 Hz [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 :**

⇒ A conductor carries 10 A current in +

*x*direction and is lying in a field having a flux density 0.2 T directed along +

*z*direction. The magnitude of force per metre length and direction are

2 N, +

*y*direction

2 N, -

*y*direction

0.02 N, +

*y*direction

0.02 N, -

*y*direction

⇒ Which of the following can provide two or more voice circuits with the same carrier?

SSB

Carrier reinsertion

Lincompex

Independent side band system

⇒

**Assertion (A):** When frequencies of signals fed to X and Y plates of CRO are multiples of each other, Lissajous pattern is displayed on screen.

**Reason (R):** In a CRO, the vertical deflection is proportional to voltage applied to Y plates.

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

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

A is true R is false

A is false R is true

⇒ A broadside array consisting of 200 cm wavelength with 10 half-wave dipole spacing 10 cm. And if each array element feeding with 1 amp. current and operating at same frequency then find the half power beamwidth

4°

2°

10°

15°

⇒ RC oscillator can be used upto

1 kHz

10 kHz

50 kHz

100 kHz

⇒ Moving iron instrument can be used for ac only.

TRUE

FALSE

⇒ The Hilbert transform of cos ω

_{1}

*t*+ sin ω

_{2}

*t*is

sin ω

_{1}

*t*+ cos ω

_{2}

*t*

sin ω

_{1}

*t*- cos ω

_{2}

*t*

cos ω

_{1}

*t*- cos ω

_{2}

*t*

sin ω

_{1}

*t*+ sin ω

_{2}

*t*

⇒ The double energy transients occur in the

pure inductive coil

R-L circuit

R-C circuit

R-L-C circuit

⇒ Which of these devices is used in relaxation oscillator?

UJT

SCR

DIAC

TRIAC

⇒ Which of the following is a false statement about Armstrong modulation system?

The system is basically phase, not frequency, modulation

AFC is not needed, as a crystal oscillator is used

Equalization is unnecessary

Frequency multiplication must be used

⇒ In an Anderson bridge the unknown inductance is measured in terms of

known inductance and resistance

known inductance

known capacitance and resistance

known capacitance

⇒

Match the following:

List I (Circuit) | List II (Characteristics) | ||
---|---|---|---|

A. | Darlington pair | 1. | uses pnp and npn transistors used as power amplifier |

B. | CB amplifier | 2. | Voltage gain nearly 1 and high input impedance |

C. | Cascade amplifier | 3. | low input impedance used for high frequency isolation |

A-1, B-2, C-3

A-2, B-3, C-1

A-2, B-1, C-3

A-3, B-1, C-2

⇒ Panel instruments are generally mounted vertically.

TRUE

FALSE

⇒ The rotation of direction of E field of a linearly polarized wave passing through a magnetised ferric medium is called

Lorentz rotation

Faraday rotation

Steinmitz rotation

Fleming's rotation

⇒

**Assertion (A):** Gray code is used in shaft position encoding.

**Reason (R):** In gray code only a single bit change occurs when going from one code to another.

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

⇒ Which of these has the highest dielectric strength?

Mica

Air

Cotton

Rubber

⇒ The hex number EB

_{16}represents binary number of

11101011

10010110

10101100

11101011

⇒ A buffer amplifier should have

high input impedance and low output impedance

high input impedance and high output impedance

low input impedance and high output impedance

low input impedance and low output impedance

⇒ In 8085 microprocessor, what is the length of IR (instruction register)?

6 bits

8 bits

12 bits

16 bits

⇒ A Schottky diode has

no minority carriers and very low voltage drop in forward direction

no minority carriers and very high voltage drop in forward direction

large number of minority carriers and very high voltage drop in forward direction

large number of minority carriers and very low voltage drop in forward direction

⇒ Which camera tube has highest dark current?

Plumbicon

Vidicon

Saticon

GCD imager

⇒ Which is correct for a transfer function?

The poles and zero must be complex

If the poles and zeros are complex or imaginary, they must be conjugate

If the poles and zeros are complex they must be simple

If a zero is imaginary, it must be simple

⇒ Consider the following statements:

- Acceptor level is formed very close to the conduction band.
- The effective mass of the free electron is same as that of a hole.
- The magnitude of the charge of a free electron is same as that of a hole.
- Addition of donor impurities adds holes to the semiconductor.

1 and 3

2 and 3

2 and 4

3 and 4

⇒ If ROC of

*x*[

*n*] is R

*then ROC of*

_{1}*a*

^{n}*x*[

*n*] is

R

_{1}

*a*

R

_{1}/

*a*

*a*/R

_{1}

R

_{1}+

*a*

⇒ To convert SR latch to D latch

connect both S and R to D

connect D to S directly and D to R through inverter

connect D to R directly and D to S through inverter

connect S to D and leave R open

⇒ A 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000). Then, what will be input, if the output register shows 100111 at the end of conversion.

5.85 V

6 V

5 V

10 V

⇒ A static induction thyristor

is a majority carrier device

is a minority carrier device

either a majority carrier or minority carrier device

has a total number of 2 leads

⇒ The system matrix of continuous time system described in state variable for

*x*< 1/2,

*y*< 1/2

*x*> 1/2,

*y*> 0

*x*< 0,

*y*< 0

*x*< 0,

*y*< 1/2

⇒

**Assertion (A):** Standard deviation is the abscissa of a point of inflection on the probability curve.

**Reason (R):** The equation for probability curv

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

⇒ The PCM signal shown below uses amplitude level of +1 volt and -1 volt to represent binary symbol 0 and 1 respectively. Each code word consists of 4 bits. The sampled version of analog signal from which this PCM signal is derived

EB596

CD231

DA495

25B6A