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Q1. | The eigen values of a skew symmetric matrix are |

A. | always zero [Wrong Answer] |

B. | always pure imaginary [Wrong Answer] |

C. | either zero or pure imaginary [Correct Answer] |

D. | always real [Wrong Answer] |

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

⇒ Permeability is analogous to

resistivity

retentivity

conductivity

coercivity

⇒ A low-pass filter frequency responce H (

*j*ω) = A (ω)

*e*

^{jΦ}(ω) does not produce any phase distortion, if

A(ω) = Cω

^{2}, Φ (ω) =

*k*ω

^{3}

A(ω) = Cω

^{2}, Φ (ω) =

*k*ω

A(ω) = Cω

^{2}, Φ (ω) =

*k*ω

^{2}

A(ω) = C, Φ (ω) =

*k*ω

^{-1}

⇒ A dynamometer wattmeter can be used for

dc only

ac only

dc and 50 Hz ac

dc and high frequency ac

⇒ The V

_{s}is give

8 V

13 V

1 V

4 V

⇒ 25 persons are in a room. 15 of them play hockey, 17 of them play football and 10 of them play both hockey and football. Then the number of persons playing neither hockey nor football is:

2

17

13

3

⇒ In paramagnetic materials

permanent magnetic dipoles exist but the interaction between neighbouring dipoles is negligible

permanent magnetic dipole do not exist

permanent magnetic dipoles exist and the interaction between neighbouring dipoles is very strong

permanent magnetic dipole moment may or may not exist

⇒ The two pressure coils in a single phase power factor meter of turns

the same dimension and the same numbers of turns

the same dimension but different number of turns

different dimension and different numbers of turns

different dimension but the same numbers of turns

⇒ In the spectrum of an FM wave

When modulation index is large, carrier frequency disappears

carrier frequency cannot disappear

amplitude of any side band depends on modulation index

the total number of side bands depend on modulation index

⇒ A load commutated chopper circuit has

one thyristor

two thyristors

four thyristors

six thyristors

⇒ For frequencies upto 1650 kHz __________ antenna is used

yagi

grounded

turnstile

marconi

⇒ In Jone chopper, the commutating element

is a capacitor

is a capacitor and an inductor

is a capacitor and an auto transformer

none of the above

⇒ Which of the following statements is not correct?

Propagation delay is the time required for a gate to change its state

Noise immunity is the amount of noise which can be applied to the input of a gate without causing the gate to change state

Fan-in of a gate is always equal to fan-out of the same gate

Operating speed is the maximum frequency at which digital data can be applied to a gate

⇒ Which of the following binary product is incorrect?

1100 x 1010 = 1111000

1.01 x 10.1 = 11.001

1100110 x 1000 = 1100110000

None of the above

⇒ The integral of a unit step function is

an impulse function

a ramp function

a ramp function of slope 1

none of these

⇒ A series RLC circuit is supplied from a variable frequency source. The resonant frequency is ω

_{0}. The voltage across L is maximum at a frequency

equal to ω

_{0}

slightly less than ω

_{0}

slightly more than ω

_{0}

none of the above

⇒ When a function Z(

*s*) having a pole at infinity is realized, we get

a capacitance in series

a resistance in series

an inductance in series

a resistance or inductance in series

⇒ In 8085, to disable the whole interrupt system (except TRAP)

the DI instruction may be used

the DO instruction may be used

the INTERRUPT instruction may be used

the El instruction may be used

⇒ Zero mean Gaussian noise of variance N is applied to a half wave rectifier. The mean squared value of the rectified output will be

0

N/2

N/2

N

⇒ Typical size of digital IC is about

1″ x 1″

2″ x 2″

0.1″ x 0.1″

0.001″ x 0.001″

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

O.C. impedance parameters

S.C. admittance parameters

ABCD parameters

*h*parameters

⇒ The PCM signal shown below uses amplitude level of +1 volt and -1 volt to represent binary symbol 0 and 1 respectively. Each code word consists of 4 bits. The sampled version of analog signal from which this PCM signal is derived

EB596

CD231

DA495

25B6A

⇒ Vividh Bharti programme is transmitted in

short wave

medium frequency

very high frequency

none of the above

⇒ A waveguide twist is used to change the plane of polarization.

TRUE

FALSE

⇒ The standard intermediate frequency for FM ratio is

10.7 MHz

4.5 MHz

75 kHz

455 kHz

⇒ If

*f*(

*t*) = 1, F(

*j*ω) =

2p

p

2pδ (p)

pδ (ω)

⇒ In liquids charge carriers are electrons only.

TRUE

FALSE

⇒ Figure represen

Tunnel diode

Zener diode

Photo diode

Photo sensitive diode

⇒ In a half wave diode rectifier circuit the current flows in the load circuit for

90° in each cycle

180° in each cycle

270° in each cycle

360° in each cycle

⇒ The transistor of following figure in Si diode with a base current of 40 μA and I

_{CBO}= 0, if V

_{BB}= 6V, R

_{E}= 2 kΩ and β = 90, I

_{BQ}= 20 μA then R

_{B200 kΩ265 kΩ150 kΩ100 kΩ}

⇒ The signal cos ω

*+ 0.5 cos ω*

_{c}t*sin ω*

_{m}t*is*

_{c}tFM only

AM only

both AM & FM

neither AM nor FM