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Q1. | The number of LED display indicators in logic probe are |

A. | 1 [Wrong Answer] |

B. | 2 [Correct Answer] |

C. | 1 or 2 [Wrong Answer] |

D. | 4 [Wrong Answer] |

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

⇒ A wavelength of 1 mm could be expected in

VLF

HF

EHF

SHF

⇒ In a network containing resistances, reactances the root of the characteristic equation give for the circuit

the forced response

the total response

the natural response

the damped response

⇒ A potential difference is developed across a current carrying metal strip when the strip is placed in a transverse magnetic field. The above effect is known as

Fermi's effect

Photo electric effect

Joule's effect

Hall's effect

⇒ In communication systems the frequency range used for voice is

15 Hz to 150 Hz

30 Hz to 1000 Hz

100 Hz to 1500 Hz

300 Hz to 3800 Hz

⇒ Which of the following measurements using a dc potentiometer do not require standardisation of potentiometer?

Measurement of unknown voltage

Measurement of resistance

Measurement of unknown current

Calibration of voltmeter

⇒ In standard TTL the totem pole stage refers to

multiemitter input stage

phase splitter

output buffer

open collector output stage

⇒ The direction in a Yagi Uda antenna is longer than the radiating element.

TRUE

FALSE

⇒ In a BJT amplifier the power gain from base to collector is 4000. The power gain in dB is

3.6

36

7.2

72

⇒ In a good voltage amplifier, its input impedance

must be high compared to the resistance of the source

must be low compared to the resistance of the source

must be equal to the resistance of the source

must be half the resistance of the source

⇒ 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

⇒ Periodic recharging of the memory cells at regular intervals of 3 to 8 millisecond is required in a

ROM

Static RAM

Dynamic RAM

PLA

⇒ A current 10 sin (200

*t*) A flows through a 5 mH inductance. The expression for voltage is

10 sin (200

*t*+ 90°)

10 sin (200

*t*- 90°)

10 sin(1000

*t*+ 90°)

10 sin (1000

*t*- 90°)

⇒ What will be FSV in 2 bit BCD D/A converter is a weighted resistor type with E

_{R}= 1V, R = 1 MΩ and R

*= 10KΩ*

_{f}0.99 V

0.9 V

0.1 V

0

⇒ An MTI compares a set of received echos with those received during the previous sweep.

TRUE

FALSE

⇒ The system of linear equations 4x + 2y = 1 , 2x + y = 6 has

a unique solution

no solution

an infinite number of solutions

exactly two distinct solutions

⇒ When a current source I is suddenly connected across a two terminal relaxed RC circuit at time

*t*= 0, the voltage across the current source is shown in figure. The RC circui

a series combination of R and C

a parallel combination of R and C

a series combination of R and parallel combination of R and C

a pure capacitor

⇒ For a good public address system the sound intensity at the farthest point should be at least

20 dB over threshold of hearing

40 dB over threshold of hearing

80 dB over threshold of hearing

120 dB over threshold of hearing

⇒ In a CE amplifier the ac emitter resistance

is zero

is high

is very high

may have any value

⇒ In carbon resistor colour code, the third band is red. It indicates

two zeros

three zeros

multiplier is 0.01

multiplier is 0.1

⇒ The seven bit Hamming code received is 0010001. If even parity has been used, the correct code is

10001

1110001

110001

11001

⇒ SSB can be generated by

filter method

phase cancellation method

good attenuation characteristics

all of the above

⇒ An electromagnetic wave can be completely guided by a dielectric rod or slab.

TRUE

FALSE

⇒ In 8085 microprocessor, if instruction RST is written in a program then the program will jump to location

0020 H

0024 H

0028 H

002 CH

⇒ Foster Seeley discriminator uses a

single tuned circuit

double tuned circuit with primary and secondary tuned to the same frequency

double tuned circuit with primary and secondary tuned to the different frequency

none of the above

⇒

**Assertion (A):** The velocity of electromagnetic waves on overhead lines and coaxial cables is the same.

**Reason (R):** Free space has an intrinsic impedance of 377 ohms.

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

⇒ The maximum counting range of a four stage counter using IC 74193 is

0 to 1023

0 to 4093

0 to 65535

0 to 131071

⇒ The maximum effective aperture of an antenna which is operating at wavelength of 2 m and has directivity of 100 is

15.92

31.84

2.18

3.184

⇒ Two identical NMOS transistors M

_{1}and M

_{2}are connected as shown below. V

_{bias}is chosen so that both transistors are in saturation. The equivalent

*g*of the pair is defined t

_{m}the sum of individual

*g*'s of the transistors

_{m}the product of individual

*g*'s of the transistors

_{m}nearly equal to the

*g*of M

_{m}_{1}

nearly equal to

*g*/

_{m}*g*

_{0}of M

_{2}

⇒ With regard to a transmission line, which of the following statements is correct?

Any impedance repeats itself every 1/4 on the Smith chart.

The S.W.R. = 2 circle and the magnitude of reflection coefficient = 0.5 circle coincide on the Smith chart.

At any point on a transmission line, the current reflection coefficient is the reciprocal of the voltage reflection coefficient.

Matching eliminates the reflected wave between the source and the matching device location.

⇒ In a second order system, the time constant t of exponential envelopes depends

only on damping factor

only on natural frequency

both on damping factor and natural frequency

neither on damping factor nor on natural frequency