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Q1. | In a bridge inverter with single pulse width modulation |

A. | the output frequency is equal to frequency of reference signal [Correct Answer] |

B. | the output frequency is equal to frequency of control signal [Wrong Answer] |

C. | either (a) or (b) [Wrong Answer] |

D. | neither (a) nor (b) [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 :**

⇒ An amplifier has input impedance of 4 kΩ and output impedance of 80 kΩ. It is used in negative feedback circuit with 10% feedback. If open loop gain is 90, the closed loop input and output impedances are

40 kΩ and 8 kΩ respectively

4 kΩ and 80 kΩ respectively

0.4 kΩ and 800 kΩ respectively

8 kΩ and 160 kΩ respectively

⇒ In a Hurwitz polynomial

all coefficients are non-negative

the coefficients may be positive or negative

all coefficients are negative

all coefficients are non-negative and all zeros should be either in left half plane or simple on the imaginary axis

⇒ In 8085 microprocessor, how many lines are there in address bus?

6

8

12

16

⇒ One ampere means the flow of

One coulomb each minute

One electron per second

One coulomb per second

One coulomb each hour

⇒ Strength of space wave is not dependent on distance.

TRUE

FALSE

⇒ The output voltage of 5-bit D/A binary ladder that has a digital input of 11010 (Assuming 0 = 0 V and 1 = + 10 V) is

3.4375 V

6.0 V

8.125 V

8.6875 V

⇒ CATV stands for

Common Antenna Television

Community Antenna Television

Cable Antenna Television

Channel Antenna Television

⇒ For a superconductor, the relative permeability is

zero

high

low

either low or high

⇒

**Assertion (A):** Dynamic RAM needs refreshing.

**Reason (R):** Capacitors tend to loose charge.

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

⇒ DMA stands for direct memory access.

TRUE

FALSE

⇒ Consider the following in C

- Arithmetic operations can be performed on ints.
- Arithmetic operations can be performed on floats.
- Arithmetic operation can be performed on chars

All

1 and 2 only

1 and 3 only

2 and 3 only

⇒ A system has its two poles on the negative real axis and one pair of poles lies on

*j*ω axis. The system is

stable

unstable

limitedly stable

either (a) or (c)

⇒ Consider the follo

1 and 2

1 and 3

1, 2 and 3

2 and 3

⇒

**Assertion (A):** The velocity of electromagnetic waves on overhead lines and coaxial cables is the same.

**Reason (R):** Free space has an intrinsic impedance of 377 ohms.

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 but R is wrong

A is wrong but R is correct

⇒ For the floating point numbers 1.81 x 10

^{-29}and 0.0152 x 10

^{18}the normalised forms are

0.181 x 10

^{-28}and 0.152 x 10

^{17 }respectively

18.1 x 10

^{-30}and 0.152 x 10

^{17}respectively

0.181 x 10

^{-28}and 1.52 x 10

^{16}respectively

None of the above

⇒ In figure the collector to emitter breakdown voltage of the transistor (βV

_{CEO}) shoul

more than V

_{CC}

more than 0.5 V

_{CC}

more than V

_{CC}+ E

more than 2 V

_{CC}

⇒ Consider the equation

*s*

^{2}+ 2

*s*+ 2 + K(

*s*+ 2) = 0. Where do the roots of this equation break on the root loci plot?

-3.414

-2.414

-1.414

-0.414

⇒ A buffer amplifier is

a double-tuned amplifier

a high gain D.C. amplifier

a cathode follower stage

none of the above

⇒

**Assertion (A):** In state space analysis, capacitors are taken to be in tree.

**Reason (R):** State variable analysis is very suitable for computer solution.

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

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

A is true but R is false

A is false but R is true

⇒ In figure, V

_{CC}= + 30 V, R

_{1}= 200 kΩ and R

_{2}= 100 kΩ. If V

_{BE}= 0.7 V, the voltage a cross R

_{E+20 V+19.3 V+10 V+9.3 V}

⇒ The polar plot of transport lag is a unit circle.

TRUE

FALSE

⇒ When all the seven segments of a display are energized, the number shown is

0

1

7

8

⇒ The number of flip flops required to construct a register to store number 102

_{10}in binary form is

2

4

8

10

⇒ The atomic weight of an atom is determined by

the number of protons

the number of neutrons

the number of protons and neutrons

the number of electrons and protons

⇒ Material which lack permanent magnetic dipoles are known as

paramagnetic

diamagnetic

ferromagnetic

ferrimagnetic

⇒ In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is

assignment, relational, arithmetic

relational, assignment, arithmetic

arithmetic, assignment, relational

arithmetic, relational, assignment

⇒ With respect to transmission parameters, which one of the following is correct?

A and B are dimensionless

B and C are dimensionless

A and D are dimensionless

B and D are dimensionless

⇒

Match the following:

List I (Camera pick up tubes) | List II (Developed by) | ||
---|---|---|---|

A. | CCD charger | 1. | Toshiba |

B. | New vicon | 2. | Philips |

C. | Plumbicon | 3. | Matushita |

D. | Chalnicon | 4. | RCA |

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

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

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

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

⇒ An ideal op-amp has

infinite input and output resistance

low input and output resistance

low input and high output resistance

infinite input resistance and zero output resistance

⇒ In microwave communication, some times, microwave signals reach large distances by following the earth curvature. This phenomenon is called

tropospheric scatter

faraday effect

ionospheric reflection

ducting