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Q1. | A certain JK FF has t = 12 nsec. The largest MOD counter that can be constructed from these FFs and still operate up to 10 MHz is_{pd} |

A. | any [Wrong Answer] |

B. | 8 [Correct Answer] |

C. | 256 [Wrong Answer] |

D. | 10 [Wrong Answer] |

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

⇒ For the minterm designation Y = ∑ m (1, 3, 5, 7) the complete expression is

Y = A BC + A B C

Y = A B C + A B C + ABC + A BC

Y = A B C + A B C + ABC + A BC

Y = A B C + ABC + A BC + A BC

⇒ A rectangular wave guide is designed to propagate at the dominant mode TE

_{10}at a frequency of 5 GHz. The cut-off frequency is 0.8 of signal frequency. The ratio of the guide width to height is 2. The dimensions of the guide are

3.75 cm, 1.875 cm

4 cm, 2 cm

8 cm, 4 cm

2.54 cm, 1.27 cm

⇒ Which of the following does not use the principle of change in inductance?

LVDT

Inductance displacement transducer

Strain gauge

Reluctance pick up

⇒ Entropy gives

measure of Uncertainty

rate of Information

average information

probability of Information

⇒ Efficiency of a half wave diode rectifier is less than 40%.

TRUE

FALSE

⇒ The start of modern computer age was started by the event

development of disc drive

development of transistor

development of Hollerith code

design of EVIAC computer

⇒ In the circuit of figure the current through 3 Ω resistance at

*t*= &infin

0.166666666666667

2.5 A

3.1 A

0

⇒ A practical Parallel resonant circuit has a coil in Parallel with a 0.14 μf capacitor. The coil has an inductance of 1 mH and a resistance of 10 ohms. The Q of the circuit is

1000

100

10

1

⇒

**Assertion (A):** In a Schottky diode the reverse recovery time is almost zero.

**Reason (R):** A Schottky diode has aluminium silicon junction.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not a correct explanation of A

A is true but R is false

A is false but R is true

⇒ Which of the following flip flops cannot be converted to D flip flop?

JK

SR

Master slave

None of the above

⇒ The characteristic equation of an SR flip-flop in given by

Q

_{n+1}= S + RQ

_{n}Q

_{n+1}= RQ

_{n}+ SQ

_{n}Q

_{n+1}= S + RQ

_{n}

Q

_{n+1}= S + RQ

_{n}⇒ In following circuit, steady state is reached with S open, S is closed at

*t*= 0, the current I at

*t*= 0

^{+}is give

9 Ω

6 Ω

7 Ω

10 Ω

⇒ Which of the following is type declaration statement in C?

int bar

*s*=

*s*+ 1

king = horse + 1

prin = prin * prin

⇒ If

*f*(

*t*) = A d(

*t*-

*a*), F(

*s*) is

A

*e*

^{-as}

A

*e*

^{as}A

*a*

*e*

^{-as}A

*a*

*e*

^{as}⇒ A lossless transmission line is 50 cm long and operates at a frequency of 500 MHz. Inductance and capacitances present in a line are 0.5 μH/m and 200 pF/m. Phase constant and phase velocity are respectively.

5p, 2p x 10

^{8}m/sec

5p, 10

^{8}m/sec

31.4, 10

^{8}m/sec

31.4, 2p x 10

^{8}m/sec

⇒ A balanced modulator circuit uses

two identical diodes with same V-I characteristics

two triodes with different V-I characteristics

two diodes with different V-I characteristics

a diode and a triode

⇒ What is the function of silicon dioxide layer in MOSFETS?

To provide high input resistance

To increase current carriers

To provide high output resistance

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5 kHz

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⇒ The binary addition 1 + 1 =

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111

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⇒ For a MOS capacitor fabricated on a P-type semiconductor, strong inversion occurs when

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surface Potential is greater than Fermi potential

surface potential is -

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surface potential is +

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⇒ A Schottky diode has

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no minority carriers and very high voltage drop in forward direction

large number of minority carriers and very high voltage drop in forward direction

large number of minority carriers and very low voltage drop in forward direction

⇒ A Hartley oscillator uses

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neither (a) nor (b)

⇒ In liquids charge carriers are electrons only.

TRUE

FALSE

⇒ When the emitter current of a transistor is changed by 1 mA, its collector current changes by 0.990 mA. The common-emitter short-circuit current gain is

1

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99

9.9

⇒ Which one is correct option?

- A pure capacitor never dissipates energy, but only stores.
- Capacitor can store finite amount of energy even cunent is zero.
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- Voltage across a capacitor cannot change instantaneously since it would require an infinite current.
*q*_{c}(0^{-}) =*q*_{c}(0^{+})

5, 4, 3, 2

3, 4, 1, 2

2, 4, 3, 1

1, 2, 3, 4, 5

⇒ Two independence parameters Z

_{11}and Z

_{12}of the two-port network in the figure

Z

_{11}= 2.75 Ω and Z

_{12}= 0.25 Ω

Z

_{11}= 3 Ω and Z

_{12}= 0.5 Ω

Z

_{11}= 3 Ω and Z

_{12}= 0.25 Ω

Z

_{11}= 2.25 Ω and Z

_{12}= 0.5 Ω

⇒ If

*x*

*is one sided to the ri*

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FALSE

⇒ The Nyquist plot of a stable, transfer function

*G*(

*s*) is shown in the figure. We are interested in the stability of the closed loop system in the feedback configuration sh

6 dB and 180°

3 dB and 180°

6 dB and 90°

3 dB and 90°

⇒ The impedance parameter

*z*

_{21}is

transfer impedance at port 1 with port 2 open circuited

transfer impedance at port 1 with port 2 short circuited

transfer impedance at port 2 with port 1 open circuited

transfer impedance at port 2 with port 1 short circuited

⇒ The following table gives some Laplace transforms and the functions

f(t) | F(s) | |

1. | δ(t) | s |

2. | u(t) | 1/s |

3. | tu(t) | 2/s^{2} |

4. | t^{2}u(t) | 2s^{3} |

2 and 4

1 and 4

2 and 4

1 and 2