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Q1. | Examine the following truth table. The product of sum from this truth tabl |

A. | (X + Y) (X + Y) [Wrong Answer] |

B. | (X + Y) (X + Y) [Wrong Answer] |

C. | (X + Y) (X + Y) [Wrong Answer] |

D. | (X + Y) (X + Y) [Correct Answer] |

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

⇒

Match the following:

List I (Types of transmission structure) | List II (Modes of propagation) | ||
---|---|---|---|

A. | Strip line | 1. | Quasi TEM |

B. | Hollow rectangular waveguide | 2. | Pure TEM |

C. | Microstrip | 3. | TE/TM |

D. | Corrugated waveguide | 4. | Hybrid |

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

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

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

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

⇒ A TTL circuit with totem pole output has

high output impedance

low output impedance

very high output impedance

none of the above

⇒ Find equivalent capacitance if each capacitance is

56 F

6/5 F

6/10 F

5/12 F

⇒ In Bode method of stability analysis, the error curve is not symmetric about corner frequency.

TRUE

FALSE

⇒ The VLF, LF and MF antennas are

horizontally polarized

vertically polarized

non linearly polarized

either (a) or (b)

⇒ Which one of the following is true for EM wave propagation through rectangular waveguide of cross-section 2

*a*x

*a*

critical wavelength for TE

_{10}mode is the same as that for TE

_{02}mode

critical wavelength for TE

_{10}mode is one half of that for TE

_{10}mode

critical wavelength for TE

_{10}mode is the same as that for TM

_{10}mode

critical wavelength for TE

_{10}mode is double that for TE

_{01}mode

⇒ Antenna radiation efficiency can be increased by

reducing radiation resistance of the system

increasing radiation resistance of the system

providing effective earthing

any of the above

⇒ Which of the following statement about the photo electric emission is incorrect?

The maximum velocity of emission varies with the frequency of incident light

The maximum velocity of emission varies with the intensity of light

The amount of photoelectric emission is directly proportional to the intensity of light

The quantum yield depends on the frequency and not the intensity of incident light

⇒ As per BIS, the number of accuracy classes of instrument is

5

6

7

8

⇒ In a bridge inverter

an output transformer is essential

an output transformer is not essential

an output transformer cannot be connected

an output transformer, if used, can improve the efficiency of the circuit

⇒ In figure, transistor β

_{dc}= 100 and LED voltage when it is conducting is 2 V. Then the base current which saturates the transisto

18 mA

1.8 mA

0.18 mA

0.018 mA

⇒ Consider the following statements regarding registers and latches:

- Registers are made of edge-triggered FFs, whereas latches are made from level-triggered FFs.
- Registers are temporary storage devices whereas latches are not.
- A latch employs cross-coupled feedback connections.
- A register stores a binary word whereas a latch does not.

1 only

1 and 3

2 and 3

3 and 4

⇒ Turn on time of a transistor switch is equal to sum of (where

*t*

_{r}is rise time,

*t*

_{d}is delay time)

*t*

_{s}-

*t*

_{r}

*t*

_{s}-

*t*

_{f}

*t*

_{d}+

*t*

_{r}

2

*t*

_{r}

⇒ The maximum power that can be transferred to the load is resistor R

_{L}from the voltage source in the figur

1 W

10 W

0.25 W

0.5 W

⇒ Which of the following constitutes an active component?

Semiconductor device

Resistors

Capacitors

Inductors

⇒ Which of the following is a valid variable in FORTRAN 77?

0.125

ALPHA -3

ALPHA 3

BALPHAC

⇒ (1 2 1)

_{x}= (1 0 0)

_{4}Then

*x*is equal to

2

3

5

does not exist

⇒ A mod 4 counter will count

from 0 to 4

from 0 to 3

from any number n to n + 4

none of the above

⇒ Which of the following is not correct in C?

6 / 4 = 1

2 / 5 = 0

2.0 / 5 = 0

2.0 / 5.0 = 0.4

⇒ Two coupled coils have self inductance L

_{1}and L

_{2}. The coefficients of coupling is

*k*. The mutual inductance is

*k*L

_{1}L

_{2}

*k*

^{2}L

_{1}L

_{2}

*k*L

_{1}L

_{2}

*k*L

_{1}L

_{2}

⇒ In a rectangular waveguide cutoff wavelength for TE

_{10 }mode is 8 cm. Then cutoff wavelength for TE

_{20}mode is

8 cm

6 cm

4 cm

2 cm

⇒ Which is a digital coding technique?

PCM

DM

DPCM

All

⇒ In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 25 MHz will be

24.09 MHz

24.54 MHz

25.45 MHz

25.91 MHz

⇒ If

*f*(

*t*) ↔ F(

*j*ω),

*f*(-

*t*) ↔

- F(

*j*ω)

F(-

*j*ω)

F(

*j*ω)

0.5 F(

*j*ω)

⇒ The relative permeability is taken as unity for which of the following?

Air

Cobalt

Vacuum

Bismuth

⇒ The signumm function written as [

*sgn(*] is defined as

*t*)*sgn(t)*= - 1 for

*t*< 0, = 0 for

*t*= 0 and = 1 for

*t*> 0

*sgn(t)*= 1 for

*t*< 0, = 0 for

*t*= 0 and = - 1 for

*t*> 0

*sgn(t)*= 0 for

*t*< 0, = 1 for

*t*= 0 and = 0 for

*t*> 0

*sgn(t)*= 0 for

*t*< 0, = 1 for

*t*

^{3}0

⇒ The bridge is balanced when the value of R is

50 Ω

100 Ω

200 Ω

250 Ω

⇒ In a half wave voltage doubler circuit the input frequency is 50 Hz. The ripple frequency is

25 Hz

50 Hz

100 Hz

150 Hz

⇒ Which of the following is non-sinusoidal oscillator?

Multivibrator

Relaxation oscillator using UJT

Relaxation oscillator using tunnel diode

Any of the above

⇒

**Assertion (A):** Slotted line is frequently used for microwave measurements.

**Reason (R):** The unknown impedance is mounted at the end of slotted line.

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 correct but R is wrong

A is wrong but R is correct