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Q1. | An index register in digital computer is a register to be used for |

A. | performing arithmetic and logic operations [Wrong Answer] |

B. | temporary storage of result [Wrong Answer] |

C. | counting number of times a program is executed [Wrong Answer] |

D. | address modification purpose [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 :**

⇒ Two 2 port circuits are connected cascaded. To determine the response, it is more convenient to use

O.C. impedance parameters

S.C. admittance parameters

ABCD parameters

*h*parameters

⇒ In a Communication system, noise is most likely to affect the signal.

at the transmitter

In the channel

in Information source

at the destination

⇒

Match the following:

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

A. | Very low response at very high frequencies | 1. | Low-pass system |

B. | Over shoot | 2. | Velocity damping |

C. | Synchro-control transformer output | 3. | Natural frequency |

4. | Phase-sensitive modulation | ||

5. | Damping ratio |

A-1, B-5, C-4

A-3, B-2, C-4

A-2, B-5, C-4

A-4, B-1, C-3

⇒ For a BJT, avalanche multiplication factor depends on

V

_{CE}

V

_{CB}

V

_{BE}

none

⇒ Human body cannot sustain electric current beyond

1 μA

10 μA

5 μA

35 μA

⇒ Which of the following is used for generating time varying wave forms?

MOSFET

PIN diode

Tunnel diode

UJT

⇒ The impulse response

*h*(

*t*) of a linear invariant continuous time system is given by h(

*t*) = exp (- 2

*t*)

*u*(

*t*), where

*u*(

*t*) denotes the unit step function. The output of this system to the sinusoidal input

*x*(

*t*) = 2cos(2

*t*) for all time

*t*, is

0

2

^{-0.25}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.25p)

⇒ The active elements on the positive and negative plates of lead acid battery are:

lead peroxide and lead

lead and lead peroxide

lead peroxide and lead sulphate

lead and lead

⇒ If an additional two diodes were used to connect the 1 kW load across a bridge rectifier circuits, utilizing the full secondary of the transformer, how much d.c. power could be delivered using a transformer with the rating of 105 VA?

35 W

60 W

85 W

100 W

⇒ The integral of

*k*δ(

*t*) is

a step function of magnitude

*k*

a step function 'of magnitude 1/

*k*

a ramp of slope

*k*

a ramp of slope 1/

*k*

⇒ A peak responding ac voltmeter using a half wave rectifier has been calibrated to read 1 V for 1 V rms sine wave input. If input is 1 V dc the reading will be

0.707 V

0.707 or 0 V

1.414 V

1.414 or 0 V

⇒ Beamwidth of an antenna depends upon

shape of radiation pattern

dimensions

wavelength

all of the above

⇒ In FM reception, amplitude disturbances due to static change

reduce the signal frequencies

increase the signal frequencies

disturb the signal frequencies

do not affect the signal frequencies

⇒ A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What percentage negative feedback should be introduced to the amplifier so that linear oscillations result?

0.0125

0.025

-0.0125

-0.025

⇒ In a T flip-flop the output frequency is

same as input frequency

half of I/p frequency

double the input frequency

none

⇒

**Assertion (A):** In a differential amplifier the current through common emitter resistor is called tail current

**Reason (R):** CMRR of an op-amp indicates how a differential signal amplified

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒ In the network of figure, the voltage drops across R

_{1}, R

_{2}, R

_{3}are 6 V, 8 V and 12 V with polarities as shown. The value of R

_{312 Ω8 Ω5 Ω3 Ω}

⇒ A moving coil meter has a resistance of 50 ohms and a full scale deflection current of 20 mA. To convert it into a voltmeter of 0-100 V range, the series resistance should be

5000 Ω

5050 Ω

4950 Ω

505 Ω

⇒ To plot frequency spectrum we draw two graphs

*viz*|F

*| versus frequency and φ*

_{n}*versus frequency.*

_{n}TRUE

FALSE

⇒ Which one of the following is used as the interface chip for data transmission between 8086 and a 16-bit ADC?

8259

8255

8253

8251

⇒ The drift velocity of electrons is

very small as compared to speed of light

equal to speed of light

almost equal to speed of light

half the speed of light

⇒ Wave guides are pressurised above normal atmospheric pressure for

increasing the power handling capacity

improving conductivity of walls

preventing higher modes from propagation

varying the wave impedance

⇒ In operational Amplifier, Common mode voltage gain should be

0

∞

1

0.5

⇒ Which 8085 instruction causes exchange of contents of stack pointer with the contents of H L register pair?

`XTHL`

`PCHL`

`LHLD`

`MVIA`

⇒

**Assertion (A):** Microstrip is very commonly used in microwave integrated circuits.

**Reason (R):** Microstrip has an easy access to the top-surface so that active and passive discrete components can be easily mounted.

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 input impedance of short-circuited line of length

*l*where λ/4 <

*l*< λ/2, is

resistive

inductive

capacitive

none of the above

⇒ Consider the following statements:

- If any root of characteristic equation has a positive real part the impulse response is unbounded and system is unstable.
- If all the roots of a characteristic equation have negative real parts, the impulse response decays to zero.
- If one or more non-repeated roots of characteristic equation are on
*j*ω axis impulse response is bounded but the system is unstable.

1, 2 and 3

1 and 2 only

1 and 3 only

2 and 3 only

⇒ A dc separately excited motor has constant field current. The armature is fed from a single phase supply through a full converter. When a = 0, speed is 500 rpm. If a = 45°, the speed is likely to be

about 350 rpm

about 250 rpm

about 175 rpm

about 125 rpm

⇒ If absolute potential of A is - 8 V and that of B is - 16 V, V

_{AB}is equal to

24 V

8 V

- 8 V

- 24 V

⇒ Transmitted voltage level is:

11

7.8

7.348 V

none of these