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Q1. | DC amplifiers have a tendency to be unstable. |

A. | TRUE [Correct Answer] |

B. | FALSE [Wrong Answer] |

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

⇒ Find E at P(1, 1, 1) caused by four identical 3

*n*C point charges located at P

_{1}(1, 1, 0), P

_{2}(- 1, 1, 0), P

_{3}(- 1, - 1, 0) P

_{4}(1, - 1, 0)

21.58

*a*

*+ 21.58*

_{x}*a*

*+ 12*

_{y}*a*

*V/m*

_{z}6.82

*a*

*+ 6.82*

_{x}*a*

*+ 32.89*

_{y}*a*

*V/m*

_{z}-6.82

*a*- 6.82

_{x}*a*- 32.89

_{y}*a*V/m

_{z}-21.58

*a*- 21.58

_{x}*a*- 12

_{y}*az*V/m

⇒ If velocity of sound waves in air at 0°C is 330 m/s, the velocity at 40°C is about

330 m/s

334 m/s

353 m/s

380 m/s

⇒ A microwave link uses only line-of-sight propagation.

TRUE

FALSE

⇒ In using mesh current method it is necessary that at least one mesh current links every element.

TRUE

FALSE

⇒

Match the following:

List I (BHE, A0) | List II (Word is read/write) | ||
---|---|---|---|

A. | 0, 0 | 1. | 1 byte from/to odd address |

B. | 0, 1 | 2. | 1 byte from/to even address |

C. | 1, 0 | 3. | 16 bit word |

D. | 1, 1 | 4. | None |

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

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

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

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

⇒

**Assertion (A):** 2's complement arithmetic is preferred in digital computers

**Reason (R):** The hardware required to obtain 2's complement is simple.

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 five flags in 8085 are designated as

Z, CY, S, P and AC

D, Z, S, P, AC

Z, C, S, P, AC

Z, CY, S, D, AC

⇒ A full adder adds

2 bits

3 bits

4 bits

any number of bits

⇒ The number of bits in ASCII is

12

10

9

7

⇒ The word 'LORAN' means

long range navigation

long range TV transmission

long range cable transmission

either (b) or (c)

⇒ The main advantage of hexadecimal numbers is

ease of conversion from hexadecimal to binary and vice-versa

ease of conversion from hexadecimal to decimal and vice-versa

ease of conversion from gray code to binary and vice-versa

the use of numbers and alphabets

⇒ The main disadvantage of a JFET is

low gain-bandwidth product

high noise level

high cost

low gain

⇒ For an ideal 3000 Hz channel, Nyquist rate is

3000 bps

6000 bps

9000 bps

12000 bps

⇒ Consider the Schmitt trigger circuit shown below. A triangular wave which goes from - 12 V to 12 V is applied to the inverting input of the op-amp. Assume that the output of the op-amp moves from +15 V to -15 V. The voltage at the non-inverting switches bet

-12 V and +12 V

-7.5 V and +7.5 V

-5 V and +5 V

0 V and 5 V

⇒ In a Karnaugh map for an expression having 'don't care terms' the don't cares can be treated as

0

1

1 or 0

none of the above

⇒ If X = 2.5 and Y = 2.5, which of the following expressions would give the result as 5/7?

X + 2.5 / Y + 3.0

(X + 2.5) / Y + 4.5

(X + 2.5) / (Y + 4.5)

(X + 2.5) / Y + 3.5

⇒ An n type semiconductor is illuminated by a steady flux of photons with energy greater than the band gap energy. The change in conductivity Δσ obeys which relati

Δσ = 0

Δσ =

*e*(σ

_{n}+ σ

_{p}) Δ

_{n}

Δσ =

*e*(μ

_{n}Δ

_{n}- μ

_{p}Δ

_{p})

Δσ =

*e*μ

_{n}Δ

_{n}

⇒ A single layer air cored coil has

*n*turns and inductance L. If a new coil is formed by having 2

*n*turns while keeping the coil length and diameter the same, the new inductance is

0.5 L

L

2 L

4 L

⇒ A radio wave is incident on a layer of ionosphere at an angle of 30° with the vertical. If the critical frequency is, 1.2 MHz, the maximum usable frequency is

1.2 MHz

2.4 MHz

0.6 MHz

1.386 MHz

⇒ A trimmer is basically a

insulator

inductor

capacitor

variable resistor

⇒ The maximum number of AM broadcast stations that can be accommodated in a 100 kHz bandwidth for the highest modulating frequency of 5 kHz will be

100

20

10

1

⇒ If number of information bits is 4, the parity bits in Hamming code are located at bit positions __________ from the LSB.

1, 2, 5

1, 2, 4

1, 2, 3

1, 2

⇒ The expression

`A`^{2} + B^{2} - 3 AB

when written is Pascal should be written as`A * A + B * B - 3 A * B`

`A * A + B * B - 3.0 A * B `

`A * A + B * B - 3.0 * A * B`

`A * A + B * A - 3 * A * B `

⇒ For radiating ultraviolet rays, LEDs use

zinc sulphide

gallium arsenide

gallium phosphide

none of the above

⇒ For the logic circuit of the given figure the simplified Boolean expression

A ⊕ B

A + B

AB

A + B

⇒ The total electrical energy emitted overall space from an electron of charge

*e*and radius

*r*is

*e*/ε

_{0}

*r*

^{2}

*e*

^{2}/ε

_{0}

*r*

*e*

^{2}/4pε

_{0}

*r*

^{2}

*e*

^{2}/8pε

_{0}

*r*

⇒ The log magnitude plot of the given figure is

type 0 system

type 1 system

type 2 system

either type 0 or type 1 system

⇒ A system with input

*x*[

*n*] and output

*y*[

*n*] is given as

*y*[

*n*] = (sin 5/6 p

*n*)

*x*(

*n*) The system is

linear, stable and invertible

non-linear, stable and non-invertible

linear stable, non invertible

linear, unstable, invertible

⇒

*n*type semiconductors

are negatively charged

are produced when indium as impurity is added to germanium

are produced phosphorus as impurity is added to silicon

none of the above

⇒ Y signal has maximum percentage of

red colour

blue colour

green colour

red and blue colours