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Q1. | The equation ∇ . J = 0 is called |

A. | Poisson's equation [Wrong Answer] |

B. | Kirchoff's node equation [Wrong Answer] |

C. | Continuity equation for static currents [Correct Answer] |

D. | Continuity equation for sampling currents [Wrong Answer] |

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

⇒ Figure sho

JFET

*n*-channel MOSFET

*p*-channel MOSFET

none of the above

⇒ In a D latch

a high D sets the latch and low D resets it

a low D sets the latch and high D resets it

race can occur

none of the above

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

MOSFET

PIN diode

Tunnel diode

UJT

⇒ An n type semiconductor is illuminated by a steady flux of photons with energy greater than the band gap energy. The change in conductivity Δσ obeys which relati

Δσ = 0

Δσ =

*e*(σ

_{n}+ σ

_{p}) Δ

_{n}

Δσ =

*e*(μ

_{n}Δ

_{n}- μ

_{p}Δ

_{p})

Δσ =

*e*μ

_{n}Δ

_{n}

⇒ A current increasing at the rate of 1A/s is passed through a 1 H inductor. At

*t*= 0,

*i*= 0. The flux linkages after 1 sec are

0.5 Wb-turn

1 Wb-turn

2 Wb-turn

4 Wb-turn

⇒

**Assertion (A):** The forward dynamic resistance of *p*-*n* diode varies inversely with current.

**Reason (R):** The forward dynamic resistance of *p*-*n* diode varies with the operating voltage.

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

⇒

Match the following:

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

A. | Output of signal generator | 1. | Modulated |

B. | Error signal from a synchro | 2. | Digital |

C. | Output of a JK flip flop | 3. | Analog |

D. | Signal received by radar | 4. | Stoichastic |

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

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

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

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

⇒

**Assertion (A):** Class A and Class B amplifier predominate in audio applications.

**Reason (R):** Class C amplifier is used at radio frequencies.

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

⇒ Fourier transform of

*f*(

*t*) =

*j*ω F(

*f*)

2p

*f*F(

*f*)

F'(

*f*)

None

⇒ The transmitting antennas for lower frequencies (below 500 kHz) are generally

vertical grounded wire type

horizontal suspended wire type

parabolic reflector type

any of the above

⇒ The force required to initiate motion between two contacting surfaces is called

coulomb friction

viscous friction

static friction

none of the above

⇒ The noise generated by a resistor depends upon

its operating temperature

its resistance value

both (a) and (b)

bandwidth

⇒ In figure we need an ac ground. The proper value of

1000 μF

100 μF

10 μF

1 μF

⇒ The fourier transform of a voltage signal

*x*(

*t*) is X(

*f*). The unit of X(

*f*) is __________ .

volts

volt

^{2}

volt/sec

volt-sec

⇒ The dual of quantity charge is

current

Voltage

flux

*d*Φ/

*dt*

⇒ The cut off wavelength λ

_{c}for TE

_{20}mode for a standard rectangles waveguide is

2/

*a*

2

*a*

*a*

2

*a*

^{2}

⇒ For TE or TM modes of propagation in bounded media, the phase velocity is

independent of frequency

is a linear function of frequency

is a non-linear function of frequency

can be frequency dependent or frequency independent on the source

⇒ The IF stage of a receiver employs

capacitive coupling

impedance coupling

double-tuned transformer coupling

single-tuned transformer coupling

⇒ When duct propagation exists

the line of sight and diffraction. Zone concepts are payable

the line of sight and diffraction zone concepts are not applicable

line of sight concept is applicable but diffraction zone concept is applicable

diffraction zone concept is not applicable but line of sight concept is not applicable

⇒ When a current source I is suddenly connected across a two terminal relaxed RC circuit at time

*t*= 0, the voltage across the current source is shown in figure. The RC circui

a series combination of R and C

a parallel combination of R and C

a series combination of R and parallel combination of R and C

a pure capacitor

⇒ A stepper motor is essentially

a synchronous motor

induction motor

dc motor

either (b) or (c)

⇒ Algebraic expression for

*z*-transform of

*x*[

*n*] is X[

*z*]... What is the algebraic expression of

*z*-transform of

*e*

^{jω0n}

*x*[

*n*]?

X(Z - Z

_{0})

X(

*e*

^{-jW0z})

X(

*e*

^{jω0z})

X(Z)

^{jω0z}

⇒ The scale of hot wire ammeter is

linear

non-linear

cramped

absolute linear

⇒ F = ∑(0, 3, 4, 5, 7) =

[B ⊕ C] + AC

B'C' + BC + AC

AB + BC + CA

None

⇒ IN 3242 is a

P-N-P transistor

N-P-N transistor

UJT

semi-conductor diode

⇒ Stepper motors find applications in

X-Y plotters

numerically controlled machining equipment

printers

all of the above

⇒ A 50 p characteristic impedance line is connected to a load which shows a reflection coefficients of 0.268. If V

_{in}= 15 volt, then the net power delivered to the load will be

0.139 W

1.39 W

0.278 W

2.78 W

⇒ A surface charge density of 8

*nc/m*

^{2}is present on a plane

*x*=

*z*. A line charge density of 30

*n*C/

*m*is present on line

*x*= 1,

*y*= 2 Find V

_{AB}for points A(3, 4, 0) and B(4, 0, 1)

583.38 V

58.338 V

583.38

*m*V

58.338

*m*V

⇒ Lead mounting for SCR is used for

rating less than mA

rating about 1 A or less

rating of 20 A or less than 20 A

rating 100 A or less

⇒ Which of the following conditions should be satisfied to call an astable multivibrator circuit using discrete components as a digital circuit?

- A flip-flop is always a digital circuit.
- Only when we assign 1 and 0 to the high and low levels of the output, a flip-flop is called a digital circuit.
- Only if the power, supply voltage is maintained at + 5 V or - 5 V, it is called a digital circuit.
- Only if it is in IC form, following the technology of IC manufacture, it is called a digital circuit.

1 only

2 and 3

2 only

3 and 4