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Q1. | Thyristors are suitable for dc circuit breakers but not for ac circuit breakers. |

A. | TRUE [Wrong Answer] |

B. | FALSE [Correct Answer] |

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**Also Read Similar Questions Below :**

⇒ 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 single phase full converter can operate in

4 quadrants

3 quadrants

2 quadrants

1 quadrant

⇒ Which of the following factors are responsible to design IC logic gates to operated at a fixed supply voltage of 5 volts?

- Low heating of IC logic gates
- Compatibility with other logic gates
- Satisfactory and safe operation
- Standardization from IC manufacturing point of view.

1 only

2 only

2 and 3

3 and 4

⇒ The minority carrier life time and diffusion constant in a semiconducting material are 100 μs and 100 cm

^{2}/s respectively. The diffusion length of carriers is

0.1 cm

0.01 cm

0.0141 cm

1 cm

⇒ For a given magnetic material operating in linear mode B = 0.06 T. Assume permeability = 51, then magnetization is:

44836 A/m

46834 A/m

946 A/m

936 A/m

⇒ Which of the following modes in circular waveguides are circularly symmetric?

TE

_{01}

TE

_{02}

both (a) and (b)

neither (a) nor (b)

⇒

Match the following:

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

A. | Mu Metal | 1. | very high magnetic permeability |

B. | Samrium/cobalt | 2. | very high magnetic remanence |

C. | Sapphire | 3. | very high thermal conductivity |

D. | Ferrites | 4. | very stable magnetic permeability |

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

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

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

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

⇒ Troposphere is the portion of atmosphere

nearest to ground

between 50 to 90 km above ground

between 110 to 220 km above ground

between 250 to 350 km above ground

⇒ Twelve resistance each 2 ohm are connected to form a cube, one resistance being in each arm of cube. The resistance between any two diagonally opposite comers is

1 Ω

2 Ω

4 Ω

8 Ω

⇒ Schottky clamping is resorted to in TTL gates

to reduce propagation delay

to increase noise margin

to increase packing density

to increase fan out

⇒ When deflecting torque and braking torque in an energy meter are zero,

the disc rotates at steady speed

the disc is stationary

the disc accelerates

the disc retards

⇒ In figure the cut in voltage of diode is 0.7 V and its bulk resistance is 20 Ω. The peak value of circuit current of during positive and negative half cycles

10 mA and zero

9.12 mA and zero

9.3 mA and zero

zero and 9.12 mA

⇒ A microstrip line has dielectric having relative permittivity ∈

*. The effective dielectric constant is*

_{r}more than ∈

_{r}equal to 1

less than ∈

_{r}either

*a*or

*b*

⇒ A capacitance transducer has two plates each of area 5 mm

^{2}. The coil gap is 2 mm. Displacement sensitivity due to change in gap length is

11.1 pF/cm

44.2 pF/cm

52.3 pF/cm

66.3 pF/cm

⇒ Find E at P(1, 1, 1) caused by four identical 3

*n*C point charges located at P

_{1}(1, 1, 0), P

_{2}(- 1, 1, 0), P

_{3}(- 1, - 1, 0) P

_{4}(1, - 1, 0)

21.58

*a*

*+ 21.58*

_{x}*a*

*+ 12*

_{y}*a*

*V/m*

_{z}6.82

*a*

*+ 6.82*

_{x}*a*

*+ 32.89*

_{y}*a*

*V/m*

_{z}-6.82

*a*- 6.82

_{x}*a*- 32.89

_{y}*a*V/m

_{z}-21.58

*a*- 21.58

_{x}*a*- 12

_{y}*az*V/m

⇒ Which of the following can provide two or more voice circuits with the same carrier?

SSB

Carrier reinsertion

Lincompex

Independent side band system

⇒ In FM modulation pre-emphasis is done for

high frequency components

low frequency components

middle frequency components

both (a) and (b)

⇒ Which of the following options is the closest in meaning to the world be

cyclic

indirect

confusing

crooked

⇒ Typical values of voltage gain for CE, CB and CC amplifiers are

100, 100 and 1 respectively

100, 1 and 100 respectively

100, 1 and 1 respectively

1, 100 and 100 respectively

⇒ The circuit in figure will act as ideal current source with respect to terminals A and B when frequenc

0

1 rad/sec

4 rad/sec

16 rad/sec

⇒ A first-order system has a time constant t. For unit ramp input, the steady state error is

t

^{2}

t

t

1/t

⇒

Match the following:

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

A. | Poles and zeros of lie an real axis driving point LC network | 1. | lie an real axis |

B. | Canonic LC network has | 2. | a zero |

C. | The number of Canonic networks for the given driving point function | 3. | minimum number of elements |

D. | The first critical frequency nearest the origin for RL driving point impedance | 4. | four |

5. | minimum number of elements | ||

6. | alternate | ||

7. | either a pole or zero | ||

8. | three |

A-1, B-5, C-8, D-7

A-6, B-5, C-3, D-2

A-1, B-5, C-4, D-2

A-1, B-3, C-4, D-7

⇒ The magnetization 'm' of a superconductor in a field of H is

extremely small

- H

-1

Zero

⇒ PA radar means

Phased Array radar

Pulsed Array radar

Pulse Amplitude radar

None of the above

⇒ When a JFET is cut off, it's like an __________ switch and when it is saturated, it's like a __________ switch.

closed, open

open, closed

open, open

closed, closed

⇒ In the circuit shown in figure the current

*I*of sinusoidal sourc

25 A

0.166666666666667

20 A

Not determinable from given data

⇒ An homogeneous dielectric material is subjected to an electric field E. If a small cavity is made inside the material, the electric field intensity inside and outside the cavity are different.

TRUE

FALSE

⇒ An electrical network with 8 independent nodes will have __________ nodal equations.

4

6

7

8

⇒ In figure what is value of I

_{C}if β

_{dc}= 100. Neglect V

_{BE5 mA5 μA10 mA10 μA}

⇒ During day time ionosphere can be considered to be consisting of

D, E, F

_{1}and F

_{2}layers

D, E, F

_{1}layers

D, E, F

_{2}layers

D and E layers