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Q1. | In VHS format diameter of head drum is about |

A. | 1 m [Wrong Answer] |

B. | 20 cm [Wrong Answer] |

C. | 6 cm [Correct Answer] |

D. | 1 cm [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ For the system of the given figure the closed loop poles are locate

*s*= 0 and

*s*= -2

*s*= 0,

*s*= -l ±

*j*3

*s*= -1 ±

*j*3

*s*= -2 and

*s*= -1 ±

*j*3

⇒ Which of the following are true for magic tee in the given figure select the answer as per given c

1, 2 and 3

1, 2 and 4

2, 3 and 4

1, 3 and 4

⇒ A capacitor can be represented by a capacitance and resistance in parallel. For a good capacitor, this parallel resistance should be

negligible

low

high

very high

⇒ Pressing a key on telephone set generates two frequencies. The basis for selection of these frequencies is

the harmonics of one frequency should not be mistaken for the other frequency

the audio input to the handset transmitter should not be mistaken for a key pressing

both (a) and (b)

neither (a) nor (b)

⇒ As temperature increases, the temperature coefficient of metals increases.

TRUE

FALSE

⇒ A transistor amplifier is operating in class A mode. If a transformer is connected for impedance matching, the efficiency will

increase

decrease

not be affected

increase or decrease

⇒ Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after SBI 0B7H?

12 H, 0

12 H, 1

DDH, 0

DDH, 1

⇒ A receiver having an RF amplifier and an IF of 450 kHz, has Q of the coils 65 and an incoming frequency of 1200 kHz. The image rejection of the receiver is

5870

3655

236

13.3

⇒ A Hartley oscillator uses FET with

*g*

*of 2 ms and*

_{m}*r*

*= 2 KΩ. The total coil inductance is 10 μH with turns ratio of input to output side of 1 : 10. It is tuned with a 50 pf capacitor. Find frequency of oscillations, amplifier gain margin in dB.*

_{d}7.11 MHz, 13.97 dB

7.3 MHz, 14.1 dB

6.93 MHz, 12.9 dB

7.4 MHz, 13 dB

⇒ The sign of a floating point number depends on

only the sign of mantissa

only the sign of exponent

the sign of both mantissa and exponent

either (a) or (b)

⇒ If X = 1 in the logic equation [X + Z { Y + (Z + X Y)}] { X + Z (X + Y)} = 1, then

Y = Z

Y = Z

Z = 1

Z = 0

⇒ A radar has a maximum range of 120 km. The maximum allowable pulse repetition frequency for unambiguous reception is

1250

330

2500

8330

⇒

Match the following:

List I (Logic family) | List II (Characteristic) | ||
---|---|---|---|

A. | TTL | 1. | Maximum power consumption |

B. | ECL | 2. | Highest packing density |

C. | NMOS | 3. | Least power consumption |

D. | CMOS | 4. | Saturated Logic |

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

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

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

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

⇒ An SCR is triggered at 80° in the positive half cycle, only. The rms anode current is 25 A. If the firing angle is changed to 160°, the rms current is likely to be

25 A

12.5 A

less than 25 A

less than 12.5 A

⇒ Accurate amplitude measurements can be made more easily than accurate phase shift measurements.

TRUE

FALSE

⇒ If the memory chip size is 256 x 1 bits, then the number of chips required to make up 1 kB (1024) bytes of memory is

32

24

12

8

⇒ An RLC series circuit is excited by a step voltage E. The units of roots of characteristic equation are

seconds

1/seconds

tesla

henry

⇒ 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.

⇒ At a very low temperature, a semiconductor

becomes a conductor

becomes an insulator

may become a conductor or an insulator

will remain a semiconductor becomes a conductor or an insulator

⇒ In a CRO which of the following is not a part of electron gun

cathode

grid

accelerating anode

X - Y plates

⇒ A series circuit has fixed resistance and variable reactance. The impedance locus will be a straight line parallel to Y-axis.

TRUE

FALSE

⇒ What does the B register contain after the first MOV B, A has been executed?

40 H

60 H

80 H

80 D

⇒ An increase in junction temperature of a semiconductor diode

causes a small increase in reverse saturation current

causes a large increase in reverse saturation current

does not affect reverse saturation current

may cause an increase or decrease in reverse saturation current depending on rating of diode

⇒ The storage capacity of DSDD disk and DSHD disk are

1.2 MB each

360 KB each

1.2 MB and 360 KB respectively

360 KB and 1.2 MB respectively

⇒ 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

⇒ In figure, V

_{G2.22 V22.2 V0.22 V0.022 V}

⇒ In 2's complement form, - 2 is

1011

1110

1100

1010

⇒ In log magnitude Bode diagram the slope of high frequency asymptote of (1 +

*j*ωT) is

20 dB per decade

10 dB per decade

20 dB per octave

10 dB per octave

⇒ APPLE was into orbit on 19 th June 1981 by European Space Agency (ESA) from

Cape Canaveral in Florida

Kourou in French Guyana

Canarvon in Western Australia

Bangalore in South India

⇒ As regards BCH code, Hamming code and Reed-Solomon code

BCH and Hamming code are special cases of Reed-Solomon code

Reed-Solomon and Hamming code are special cases of BCH code

BCH and Reed-Solomon code are special case of Hamming code

none of the above