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Q1. | In a 3 phase full converter, the firing angle is less than 60°. The instantaneous output voltage |

A. | will have positive part only [Correct Answer] |

B. | will have both positive and negative parts [Wrong Answer] |

C. | may have both positive and negative parts [Wrong Answer] |

D. | will have negative part if load is inductive [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ QAM stands for

Quasi-Amplitude Modulation

Quadrature Angle Modulation

Quadrature Amplitude Modulation

None of the above

⇒ Which of the following antennas is λ /4 length?

Dipole

Marconi

Monopole

Parabolic

⇒ 11101

_{2}x 10001

_{2}=

111101101

111101100

11110

1100110

⇒ Which of the following devices uses a helix?

Klystron amplifier

Klystron oscillator

TWT

Both (a) and (b)

⇒ Two port network is said to be symmetrical if

Δ

_{h}= 1

Z

_{11}= Z

_{2}

A = Δ

all

⇒ A wire has a diameter

*d*and resistance R. If the diameter is made 3

*d*, the length and material remaining the same, the new value of resistance will be

R/3

3 R

R/9

9 R

⇒ In 8085, which instructions are useful for writing and using subroutines?

CALL

RET

CALL and RET

none of the above

⇒ Fleming's left hand rule is used to find

direction of force on a current carrying conductor

direction of flux in solenoid

direction of magnetic field due to a current carrying conductor

direction of induced emf

⇒ The measurement of Hall coefficient of a semiconductor with one type of charge carriers gives the information about

sign of charge carrier

density of charge carrier

both sign and density of charge carrier

none of the above

⇒ The coupling capacitor mainly affects

bandwidth

lower cut-off frequency

higher cut-off frequency

both lower as well as higher cut-off frequency

⇒ A lossless transmission line is 50 cm long and operates at a frequency of 500 MHz. Inductance and capacitances present in a line are 0.5 μH/m and 200 pF/m. Phase constant and phase velocity are respectively.

5p, 2p x 10

^{8}m/sec

5p, 10

^{8}m/sec

31.4, 10

^{8}m/sec

31.4, 2p x 10

^{8}m/sec

⇒ When the length of antenna is a whole wavelength

the radiation at right angles is zero

the radiation at right angles is maximum

the radiation is zero in all directions

the radiation is maximum in all directions

⇒ A capacitor used for power factor correction in single- phase circuit decreases

the power factor

the line current

both the line current and the power factor

the line current and increases power factor

⇒ 2's complement of binary number 0101 is

1011

1111

1101

1110

⇒ Given digits 2, 2, 3, 3, 3, 4, 4, 4, 4 how many distinct 4 digit numbers greater than 3000 can be formed?

50

51

52

54

⇒ In a megger the controlling torque is provided by

spring

gravity

coil

eddy current

⇒ On which of the following effect do thermocouples work?

Thomson effect

Seeback effect

Peltier effect

Joule effect

⇒ In an ac coordinate potentiometer, the currents inphase and quadrature potentiometer are adjusted to be

out of phase by 90°

in phase

out of phase by 45°

out of phase 180°

⇒ Consider the transmission line of length 37.5 cm, which is terminated into zero resistance. This line is being exited by a source of 1 GHz which has an internal impedance of 50 Ω. What is the input impedance of the line as seen by the source?

50 Ω

Zero Ω

100 Ω

Infinite Ω

⇒ The modulation index of an AM wave is changed from 0 to 1. The transmitted power is

unchanged

halved

increased by 50%

quadrupled

⇒ The system of the given fi

is unstable for all values of K

is stable for all values of K

can be stable for some values of K

data is insufficient to determine stability

⇒ In a single phase cycloconverter with centre tapped transformer

all thyristors carry currents for equal duration

the durations of currents in all thyristors may or may not be equal

the durations of currents in all thyristors cannot be equal

the duration of currents in all thyristors must be equal for satisfactory operation

⇒ In VHS format diameter of head drum is about

1 m

20 cm

6 cm

1 cm

⇒ Consider a loss less antenna with a directive gain of + 6 dB. If 1 mW of power is fed to it the total power radiated by the antenna will be

4 mW

1 mW

7 mW

1/4 mW

⇒ Which one of the following is valid integer variable in FORTRAN 77?

`BRG`

`IBRG`

`VS`

`PEC`

⇒

Match the following:

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

A. | Direct addressing | 1. | MOV A, M |

B. | Register addressing | 2. | MOV C, A |

C. | Register indirect addressing | 3. | LDA 7 |

D. | Immediate addressing | 4. | STA FFC |

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

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

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

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

⇒

Match the following:

List I (type of controller) | List II (Operation) | ||
---|---|---|---|

A. | Pneumatic controller | 1. | Flexible operation |

B. | Hydraulic controller | 2. | High torque high speed operation |

C. | Electronic controller | 3. | Fire and explosion proof operation |

A-1, B-3, C-2

A-1, B-2, C-3

A-3, B-1, C-2

A-3, B-2, C-1

⇒ An

*E*transformer is a

displacement transducer

velocity transducer

acceleration transducer

pressure transducer

⇒ The loss of charge method can be used to measure

resistance of shunt

insulation resistance of cable

resistance of shunt winding

both (b) and (c)

⇒

**Assertion (A):** Tunnel diode is used in many pulse and digital circuits.

**Reason (R):** The *v*-*i* curve of a tunnel diode resembles letter 'N'.

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