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Q1. | When a diode is not conducting, its bias is |

A. | forward [Wrong Answer] |

B. | zero [Wrong Answer] |

C. | reverse [Wrong Answer] |

D. | zero or reverse [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 :**

⇒ The material which has zero temperature coefficient of resistance is

manganin

porcelain

carbon

aluminium

⇒ Which of the following is true?

SOP is a two level logic

POS is a two level logic

Both SOP and POS are two level logic

Hybrid function is two level logic

⇒ The energy of highest value of Autocorrelation of a function 100 cos 50 p

*t*is

50

10

200

zero

⇒ The model of a system

is unique

depends on desired degree of accuracy

depends on the type of analysis

both (b) and (c)

⇒ What is the necessary a.c. input power from the transformer secondary used in a half wave rectifier to deliver 500 W of d.c. power to the load?

1232 W

848 W

616 W

308 W

⇒ The decorative lighting works on the principle of

periodic switching on and off

special inverter

rectifier

motor

⇒

Match the following:

List I (Operator) | List II (Description) | ||
---|---|---|---|

A. | ? : | 1. | Modulus |

B. | [ ] | 2. | Array expression |

C. | % | 3. | Conditional |

A-3, B-2, C-1

A-1, B-2, C-3

A-1, B-3, C-2

A-2, B-3, C-1

⇒ In the given figure the number of combinations of three non touching loop

0

1

2

3

⇒

**Assertion (A):** For a magnetic material M = (μ_{r} - 1) H, where M is magnetic dipole moment/m^{3}, H is field intensity A/m and μ_{r} is relative permeability.

**Reason (R):** μ_{r} can have any value from 0 to hundreds of thousands.

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

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

A is true but R is false

A is false but R is true

⇒ A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/

*f*is constant. At 50 Hz, the speed is 1440 rpm. At 25 Hz, the speed is likely to be

about 1350 rpm

about 720 rpm

about 360 rpm

either (b) or (c)

⇒ The sensitivity curve of a standard receiver is represente

curve A

curve B

curve C

curve D

⇒ When .9432 E - 4 is subtracted from .5452 E - 3 in normalized floating point mode

none of the numbers is changed

.9432 E - 4 is changed to .09432 E - 3 and .5452 E - 3 is not changed

.5452 E - 3 is changed to 5.452 E - 4 but .9432 E - 4 is not changed

both Ihe numbers are changed and their exponents are, made equal to -5

⇒ Terra-watt is equal to

10

^{3}W

10

^{6}W

10

^{9}W

10

^{12}W

⇒ A computer program is used to read N and print the sum 1

^{2}+ 2

^{2}+ 3

^{2}+.....+ N

^{2}. If N = 10, the print out will show the number

100

10

385

285

⇒ Consider the following statements

- The amplitude of an FM wave is constant
- FM is more immune to noise than AM
- FM broadcasts operate in upper VHF and UHF frequency ranges
- FM transmitting and receiving equipments are simpler as compared to AM transmitting and receiving equipments

1, 2, 3, 4

1, 2, 3

2, 3, 4

1, 3, 4

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

TRUE

FALSE

⇒ The realization of the term Ks yields

a resistance of value K ohms

a capacitances of value K farads

an inductance of value k farads

either (b) or (c)

⇒ In a CB amplifier the maximum efficiency could be

0.99

0.85

0.5

0.25

⇒ A buffer amplifier should have

high output impedance and high input impedance

high output impedance and low input impedance

low output impedance an low input impedance

low output impedance and high input impedance

⇒ The derating factor for a BJT transistor is about

0.5 mW/°C

2.5 mW/°C

10 mW/°C

25 mW/°C

⇒ In an R-L circuit excited by a battery of voltage E, the current and voltage across resistor are 1-

*e*

^{-t}and 2(1 -

*e*

^{-t}) respectively. If there were an initial current of 2 A in the inductance, the voltage across resistance would have been

1 -

*e*

^{-t}

2 - 2

*e*

^{-t}

2 + 2

*e*

^{-t}

4 - 4

*e*

^{-t}

⇒ Which of the following statement is correct?

FET and junction transistor both are unipolar

FET and junction transistor both are bipolar

The FET is bipolar, while junction transistor are unipolar

The FET is unipolar, while junction transistor are bipolar

⇒ For a second order instrument, the optimum range of ξ (damping ratio), which gives good frequency response over a wide range of frequencies is

0.5 to 0.6

0.6 to 0.7

0.7 to 0.8

0.8 to 1.0

⇒ Which of the following element does not have three valence electrons?

Boron

Aluminium

Gallium

Phosphorus

⇒ The given figure shows three Nyquist plots of G(

*s*) H(

*s*) =

*e*/[

^{-sT}*s*(

*s*+ 1)] for different values of T. The curves 1, 2, 3 ca

for T = 0, 0.5 and 1 respectively

for T = 1, 0.5 and 0 respectively

for T = 0.5, 1 and 0 respectively

for T = 0, 1 and 0.5 respectively

⇒ The ripple factor of a full wave rectifier is about 0.5.

TRUE

FALSE

⇒ In the signal flow graph of figure below, the gain C/R will

43048

22/15

24/23

44/23

⇒ For type 2 system, the magnitude and phase angle of the term (

*j*ω)

^{2}in the denominator, at ω = 0, are respectively

0 and - 90°

0 and + 90°

infinity and - 180°

infinity and + 180°

⇒ In a conventional AM superhetrodyne receivers, the detectors employed to extract intelligence include

Peak detectors

Ratio detectors

PLL

Slope detectors

⇒ In a lead acid cell, the positive plate has spongy lead.

TRUE

FALSE