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Q1. | In dielectric heating, the thyristor circuits consist of |

A. | rectifier-chopper combination [Wrong Answer] |

B. | controlled rectifier [Wrong Answer] |

C. | ac regulator [Wrong Answer] |

D. | rectifier-inverter combination [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 an RL series circuit the inductance is 1H and current at an instant is 0.6 A. The energy stored in magnetic field is

0.36 J

0.18 J

0.09 J

0.03 J

⇒ For input and later stages, BI-FET op-amp use

JFETs and MOSFETs respectively

MOSFETs and JFETs respectively

JFETs and BJTs respectively

BJTs and JFETs respectively

⇒ For the compensator in the given figure the maximum phase lea

sin

^{-1}(1/3)

30°

45°

60°

⇒ A memory system of size 16 K bytes is required to be designed using memory chips having 12 address lines and 4 data lines-each. The number of such chips required to design and the memory system is :

2

4

8

16

⇒ Full duplex operation-permits transmission in both directions at the same time.

TRUE

FALSE

⇒ A signal

*x*

_{1}(

*t*) and

*x*

_{2}(

*t*) constitute the real and imaginary parts respectively of a complex valued signal

*x*(

*t*). What form of waveform does

*x*(

*t*) possess?

Real symmetric

Complex symmetric

Asymmetric

Conjugate symmetric

⇒ As per BIS there are 6 accuracy classes of instruments.

TRUE

FALSE

⇒

**Assertion (A):** XOR gate is not universal gate.

**Reason (R):** It is not possible to realize any Boolean function using XOR gates only.

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 true, R is false

A is false, R is true

⇒ Which of the following waves do not exist in waveguides?

TE waves

TM waves

TE and TM waves

TEM waves

⇒ The polarization of dielectric materials results in

production of eddy currents

creation of electric dipoles

absorption of electrons

release of high velocity protons

⇒ The range of life time carriers (electrons and holes) is

1 μ

*s*to 100 μ

*s*

1 nano sec to 1 μ

*s*

1 nano sec to hundreds of μ

*s*

none of the above

⇒ In waveguide Degenerate modes are

two mode having same cut off frequency

two mode having same power

two mode having same phase velocity

it is a hypothetical mode

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

extremely small

- H

-1

Zero

⇒ 5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?

20 days

18 days

16 days

15 days

⇒ In figure, the magnitude

must be more than that of V

_{a}

must be more than that of V

_{b}

must be more than that of V

_{a}or V

_{b}

can be equal to or less than or more than that of V

_{a}or V

_{b}

⇒ In a network

the number of tree branches is always less than the number of links

the number of tree branches is always more than the number of links

the number of tree branches and links are always equal

the number of tree branches has no relation with the number of links

⇒ A first order system will never be able to give a __________ response

- band stop
- band pass
- all pass

1, 2, 3 true

1 and 3 true, 2 false

1, 2 are true 3 is false

1, 2 are false, 3 is true

⇒ In order to protect a MOSFET against damage from any stray voltage at the gate

grounding rings are provided

terminals are shorted

source terminal is earthed during transit

none of these

⇒ The current through the coil of an electromagnet is doubled. The magnetic field around the coil

is halved

is doubled

becomes four times

remains the same

⇒ A heavily doped semiconductor exhibits a __________ such a device is called sensistors.

negative temperature coefficient of resistance

positive temperature coefficient of resistance till a particular value of temperature and then it shown negative temperature coefficient of resistance

positive temperature coefficient of resistance

none of the above

⇒ In the Taylor series expansion of exp(

*x*) + sin(

*x*) about the point

*x*= p, the coefficient of (

*x*- p)

^{2}is

exp (p)

0.5 exp (p)

exp (p) + 1

exp (p) - 1

⇒ Which of the following terms are equivalent?

- A ⊕ B ⊕ C
- A ⊕ B ⊙ C
- A ⊙ B ⊕ C
- A ⊙ B ⊙ C

1 and 4; 2 and 3

1 and 3

2 and 3

1, 2 and 4

⇒ Which one of following is a stataic system?

*y*(

*n*) =

*x*(

*n*) -

*x*(

*n*- 1)

*y*(

*n*) =

*x*(2

*n*) -

*x*(2

*n*-1)

*y*(

*n*) =

*x*(

*n*- 1)

*y*(

*n*) =

*e*

^{x(n)}

⇒ An

*m*derived low pass filter has

*f*

_{c}= 1000 Hz and

*m*= 0.6. This filter will have infinite attenuation at

*f*= 1250 Hz

all frequencies above 1000 Hz

*f*= 1562.5 Hz

*f*= 1666.67 Hz

⇒ The PIV of a bridge rectifier is less than that of full wave rectifier with centre tapped transformer.

TRUE

FALSE

⇒ In Z

_{RC}(

*s*) has a pole at

*s*= ∞, the last element in first Foster realization is

R

C

R and C in series

R and C in parallel

⇒ Which of the following instructions have only one operand?

Multiply

Add

Shift

Subtract

⇒ A computer program is used to read N and compute N !. IF N = 6, the result will be

6

12

720

1040

⇒ With reference to C programming language, which of the following statements are correct?

- An identifier may start with an underscore.
- An identifier may end with an underscore.
- If is a valid identifier.
- The number of significant characters in and identifier is implementation dependent.

1 and 2 only

2 and 3 only

1, 2, 3 and 4

3 and 4 only

⇒ A d.c. power supply has an open circuit voltage of 100 V. When the full load current is drawn, the output drops to 80 V. The percentage voltage regulation is

0.9725

0.75

0.5

0.25