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Q1. | A network has 10 nodes and 17 branches. The number of different node pair are |

A. | 7 [Wrong Answer] |

B. | 9 [Correct Answer] |

C. | 10 [Wrong Answer] |

D. | 45 [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ In amplitude modulation, the magnitude of side bands is

*ma*/2 times the carrier amplitude, E

_{c}

*ma*times the carrier amplitude, E

_{c}

2

*ma*times the carrier amplitude, E

_{c}

4

*ma*times the carrier amplitude, E

_{c}

⇒ Which amplifier will be preferred for highest gain?

Darlington's pair

Single stage amplifier

Cascade amplifier

Depends on the circuitry

⇒ Which of the following statements is not correct for thermistors?

They have negative temperature coefficient of resistance

The sensing element is made of sintered ceramics, which are oxides of metals in the form of beads

The variation of resistance with temperature is linear

The resistance value at ambient temperature may range from 100 Ω to 100 kΩ

⇒ For transistor 2 N 338 the manufacturer specifies P

_{max}= 100 mW at 250°C free air temperature and maximum junction temperature of 125°C. Its thermal resistance is

10° C/W

100° C/W

1000° C/W

5000° C/W

⇒ For a bipolar transistor, avalanche multiplication factor depends on __________ .

V

_{CE}

V

_{CB}

V

_{BE}

none of these

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

*t*= 0

^{+0.1666666666666672.5 A3.1 A0}

⇒ Microwave signals follow the curvature of the earth and the phenomenon

tropospheric scatter

faraday effect

duct propagation

none

⇒ ADC 0804 is a

dual slope A/D converter

single slope A/D converter

successive approximation A/D converter

either (a) or (b)

⇒ Which of the following can be used as a rotating amplifier in a control system?

- Amplidyne
- Separately excited dc generator
- Synchro
- Self excited dc generator

3 and 4

1 and 2

1, 2 and 3

all

⇒ Modified Mc Murray full bridge inverter uses

4 thyristors and 2 diodes

4 thyristors and 4 diodes

8 thyristors and 4 diodes

8 thyristors and 8 diodes

⇒ Resistivity of carbon is around

10 to 70 m-ohm-cm

80 to 130 m-ohm-cm

800 to 1300 m-ohm-cm

8000 to 13000 m-ohm-cm

⇒ When the height of a vertical earthed antenna is less than λ/4

the base input impedance will be capacitive

the base input impedance will be purely resistive

the base input impedance will be inductive

the base input impedance will be negligibly small

⇒ The unit of loudness is

phon

sone

decibel

mel

⇒ The main advantage of TDM over FDM is

TDM requires more bandwidth than FDM

less complicated in hardware than FDM

better SNR

required filter

⇒ The bandwidth required for amplitude modulation is

half the frequency of modulating signal

equal to the frequency of modulating signal

twice the frequency of modulating signal

four times the frequency of modulating signal

⇒ In a ripple counter,

whenever a flip flop sets to 1, the next higher FF toggles

whenever a flip flop sets to 0, the next higher FF remains unchanged

whenever a flip flop sets to 1, the next higher FF faces race condition

whenever a flip flop sets to 0, the next higher FF faces race condition

⇒

**Assertion (A):** Artificial transmission lines are frequently used in laboratories.

**Reason (R):** An artificial transmission line can be used to represent an actual line and can also be used as a delay circuit, as attenuator, as filter network etc.

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

⇒

**Assertion (A):** Stubs, directional couplers and baluns are very commonly used in communication systems

**Reason (R):** Characteristic impedance of a line is an important parameter.

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 output

*y*(

*t*) of a linear time invariant system is related to its input

*x*(

*t*) by the following equation

*y*(

*t*) = 0.5

*x*(

*t*-

*t*

*+ 1) +*

_{d}*x*(

*t*-

*t*

*) + 0.5*

_{d}*x*(

*t*-

*t*

*+ 7). The filter transfer function*

_{d}*H*(ω) of such a system is given by

(1 + cos ωt)

*e*

^{-jωt}

*d*

(1 + 0.5 cos ωt)

*e*

^{-jωt}

*d*

(1 + cos ωt)

*e*

^{jωt}

*d*

(1 - 0.5 cos ωt)

*e*

^{-jωt}

*d*

⇒ A typical microcomputer has 65, 536 registers in its memory. It will be specified as

65.536 memory

65.536 K memory

64 K memory

8 K memory

⇒ For an illumination control circuit it is advisable to use a matched TRIAC-DIAC pair.

TRUE

FALSE

⇒ Separation property of state-transition matrix is

φ(

*t*-

*t*

_{0}) = φ(

*t*) φ(

*t*

_{0})

φ(

*t*-

*t*

_{0}) = φ

^{-1}(

*t*) φ

^{-1}(

*t*

_{0})

φ(

*t*-

*t*

_{0}) = φ(

*t*) φ

^{-1}(

*t*

_{0})

φ(

*t*-

*t*

_{0}) = φ

^{-1}(

*t*) φ

^{-1}(

*t*

_{0})

⇒ A Hartley oscillator uses

a tapped inductor

a tapped capacitor

both (a) and (b)

neither (a) nor (b)

⇒ The complement of Boolean expression AB (B C + AC) is

(A + B) + (B + C) + (A + C)

A B + (B + C)(A + C)

(A + B) + (B + C) (A + C)

none of the above

⇒ In a bipolar junction transistor the base region is made very thin so that

recombination in base region is minimum

electric field gradient in base is high

base can be easily fabricated

base can be easily biased

⇒

**Assertion (A):** If Z_{1}(*s*) and Z_{2}(*s*) are positive real then Z_{1}(*s*) + Z_{2}(*s*) as well as 1/Z_{1}(*s*) and 1/Z_{2}(*s*) are positive real.

**Reason (R):** The poles of a positive real function are real or occur in conjugate pairs.

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

Both A and R are true and R is not the correct explanation of A

A is true but R is false

A is false but R is true

⇒ Frequency domain of a periodic triangular function is a

discrete sinc function

continuous sampling function

discrete sampling function

continuous sampling square function

⇒ An FM signal with a deviation δ is passed through a mixer, and has its frequency reduced 5 fold. The deviation in the output of the mixer is

5/δ

Intermediate

δ/5

δ

⇒ Which of the following is correct?

Voltages across a capacitance can change instantaneously

Voltages across a capacitance cannot change instantaneously

Charge across a capacitance is always constant

Charge across a capacitance can change instantaneously

⇒ In the absence of noise, if C is channel capacity in bits/s, δ

*f*is channel bandwidth in Hz and N is number of coding levels. Then

C = log

_{2}N

C = (δ

*f*) log

_{2}N

C = 2 (δ

*f*) log

_{2}N

C = 0.5 (δ

*f*) log

_{2}N