Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | Two thyristor of same rating and same specifications |

A. | will have equal turn on and turn off periods [Wrong Answer] |

B. | will have equal turn on but unequal turn off periods [Wrong Answer] |

C. | may have equal or unequal turn on and turn off periods [Correct Answer] |

D. | will have unequal turn on and turn off periods [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒

**Assertion (A):** A good algorithm should be fast, require minimal computer memory and time.

**Reason (R):** Many times an algorithm is prepared in the form of a flow chart.

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 correct R is wrong

A is wrong R is correct

⇒ Which of the following elements act as donor impurities?

- Gold
- Phosphorus
- Boron
- Antimony
- Arsenic
- Indium

1, 2, 3

1, 2, 4, 6

3, 4, 5, 6

1, 4, 5

⇒ The conductivity of an intrinsic semiconductor is

generally less than that of a doped semiconductor

given by σ

_{1}=

*en*

_{i}(μ

_{n}- μ

_{p})

given by σ

_{1}=

*en*

_{i}(μ

_{p}+ μ

_{n})

given by σ

_{1}=

*n*

_{i}(μ

_{n}+ μ

_{p})

⇒ 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

⇒ In amplitude modulation the rms value of radio frequency voltage after 40% modulation is 60 mV. If modulation is 80% the rms value after modulation will be about

50 mV

60 mV

66 mV

80 mV

⇒

**Assertion (A):** An unbiased p-n junction develops a built-in potential at the junction with the *n*-side positive and the *p*-side negative.

**Reason (R):** The *p-n* junction behaves as a battery and supplies current to a resistance connected across its terminals.

Both A and R are individually true and R is the correct explanation of A

Both A and R are individually true but R is not the correct explanation of A

A is true but R is false

A is false but R is true

⇒ The number of possible colours with a 4 line digital input monitor are

4

16

64

2

⇒ In commercial FM Broadcasting, A radio station transmitting the signal at 98.3 MHz, it is

carrier frequency

modulation frequency

message frequency

channel frequency

⇒ A wave E

*cos (b*

_{m}*x*- ω

*t*) is a backward wave.

TRUE

FALSE

⇒ For a second order system with 0 < ξ < 1, the angle which poles make with negative real axis is

sin

^{-1}ξ

cos

^{-1}ξ

tan

^{-1}ξ

cot

^{-1}ξ

⇒ Photo electric emission can occur only if the frequency of light is more than threshold frequency.

TRUE

FALSE

⇒ Sulphur hexafluoride is used in

transformers

generators

relays

circuit breakers

⇒ For an I/p of V

_{s}= 5 sin ω

*t*(assuming ideal diode), circuit shown in the figure will behave

clipper, sine wave clipped at -2 V

clamper, sine wave clamped at -2 V

clamper, sine wave clamped at 0 volts

clipper, sine wave clipped at 2 V

⇒ An induction wattmeter can be used for

dc only

50 Hz ac only

both ac and dc

high frequency ac only

⇒ If transmitted power is 75 kW, the field strength at 30 km distance will be about

10 V/m

1 V/m

50 mV/m

2 mV/m

⇒ As B is increased from zero to about 2T, μ

_{r}, of a ferromagnetic material

increase

decrease

first increases then decreases

remains the same

⇒ What will be maximum input that can be converted for a 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).

9 V

9.45

10 V

8 V

⇒ If a number of odd functions are added, the resultant sum is

even function

odd funtion

either even or odd function

mixture of odd amd even functions

⇒ If a sheet of a mica is inserted between the plates of an air capacitor, the capacitance

will increase

will return the same

will decrease

may increase or decrease

⇒ Consider the following:

- Oscillator
- Emitter follower
- Cascaded amplifier
- Power amplifier

1 and 2

1 and 3

2 and 4

3 and 4

⇒ The element in the feedback circuit of a logarithmic amplifier using op-amp is

a resistor

a capacitor

an inductor

a diode

⇒ At the peak of negative half cycle in fi

diode A is forward biased and diode B is reverse biased

both diodes are reverse biased

both diodes are forward biased

diode A is reverse biased and diode B is forward biased

⇒ In a multicavity klystron amplifier the signal to be amplified develops an ac voltage of signal frequency across the gap in buncher cavity

TRUE

FALSE

⇒ It is desired to evaluate the expression

`F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

`F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)]`

`F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

` X = COS(Y)`

⇒ DC tachogenerator can be used in

speed control system

position control system

both (a) and (b)

neither (a) nor (b)

⇒ The charge per proton is

1.6 x 10^{-19} C

2.6 x 10^{-19} C

0.6 x 10^{-19} C

1.6 x 10^{-13} C

⇒ In a Hurwitz polynomial

all coefficients are non-negative

both the odd and even parts have roots on *j*ω axis

the continued fraction expansion is the ratio of odd to even parts of a Hurwitz polynomial yields all positive quotient terms

all of the above

⇒ Electrons within a metal have energy levels from zero to Fermi level E_{F}.

TRUE

FALSE

⇒ Two impedances 10 - *j* 10 and 10 + *j* 10 are connected in parallel. Their combined impedance is

5 + *j*5

5 - *j*5

10 + *j*0

20 - *j*10

⇒ Match the following:

List I List II A. Very low response at very high frequencies 1. Low-pass system B. Over shoot 2. Velocity damping C. Synchro-control transformer output 3. Natural frequency 4. Phase-sensitive modulation 5. Damping ratio

A-1, B-5, C-4

A-3, B-2, C-4

A-2, B-5, C-4

A-4, B-1, C-3

```
```

```
```

```
```

```
```