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Q1. | The terms RMS and average values apply only to sine waves. |

A. | TRUE [Wrong Answer] |

B. | FALSE [Correct Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance

decreases

increases

remains constant

may increases or decreases

⇒ In a backward wave oscillator the wave

travelling along the line winds itself back and forth

progresses only in forward direction

progresses only in backward direction

either (a) or (c)

⇒ What is the addressing mode used in instruction MOV M, C?

Direct

Indirect

Induced

Immediate

⇒ Household tape recorders use

separate motor for each operation

only one motor for all operations

one motor for capstan and another for take up reel

a total of 3 motors

⇒ One of a loss-less transmission line having the characteristic impedance of 75 Ω and length of 1cm is short-circuit. At 3 GHz, the input impedance at the other end of the transmission line is

0

resistive

capacitance

inductive

⇒ A series RLC circuit is at resonance at 200 Hz. If capacitance is increased to four times, the circuit will be in resonance at

200 Hz

400 Hz

100 Hz

800 Hz

⇒

Match the following:

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

A. | bit | 1. | 10 |

B. | nat | 2. | e |

C. | decit | 3. | 2 |

A-1, B-2, C-3

A-1, B-3, C-2

A-3, B-2, C-1

A-2, B-3, C-1

⇒ A resistance strain gauge has a resistance of about

100 Ω

25 Ω

10 Ω

1 Ω

⇒ In the given figure, of potentiometer V

_{0}= V

*(R*

_{i}_{0}/R

*) only*

_{i}R

_{L}= 0

R

_{L}= ∞

R

_{L}is neither low nor high

R

_{L}is low but not zero

⇒ A MASER is a

low noise device

high noise device

medium noise device

may be either high or medium noise device

⇒

**Assertion (A):** If frequency is high, the distance between transmitter and antenna may be an appreciable fraction of wavelength

**Reason (R):** Wavelength is inversely proportional to frequency.

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

⇒ The polar plot of P (

*j*ω) = 45° as ω varies from -∞ to ∞ is

a straight line parallel to

*x*-axis

a straight line parallel to

*y*-axis

a line passing through origin and inclined at 45°

a line in first quadrant passing through origin and inclined at 45° to positive

*x*-axis

⇒ What will be output for decimal input 82?

0.82 V

8 V

0.1 V

10 mV

⇒ In a modulator it is found that the amplitude spectrum consists a component at

*f*, the carrier frequency and one component each at

_{c}*f*-

_{c}*f*and

_{s}*f*+

_{c}*f*where

_{s}*f*is the modulating signal frequency. Then the modulator used is

_{s}AM

AM or MBFM with modulation index 0.5

FM

PAM

⇒ In communication systems the frequency range used for voice is

15 Hz to 150 Hz

30 Hz to 1000 Hz

100 Hz to 1500 Hz

300 Hz to 3800 Hz

⇒ The life time of a geosynchronous communication

5

10

20

50

⇒ Which one of the following is not necessarily an advantage of the phase cancellation method of obtaining SSB over the filter method?

It is possible to generate SSB at any frequency

SSB with lower audio frequencies present can be generated

Switching from one sideband to other is simpler

There are more balanced modulators; therefore the carrier is suppressed better

⇒ An 8085 executes the following instructions

PC = 30A0H HL = 2715H

PC = 6104 H HL = 6140 H

PC = 6140H HL = 2715H

⇒

Match the following:

List I (Theorems) | List II (Property of Network) | ||
---|---|---|---|

A. | Reciprocity | 1. | Impedance matching |

B. | Tellegen's | 2. | Bilateral |

C. | Superposition | 3. | ∑ V_{jk} I_{jk} = 0 |

D. | Maximum power transfer | 4. | Linear |

5. | Non linear |

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

A-1, B-2, C-3, D-5

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

A-2, B-3, C-5, D-1

⇒ A clamper

adds a dc component to the input signal

removes signal voltages above or below a specified value

both (a) and (b)

either (a) or (b)

⇒

**Assertion (A):** A radiation pyrometer is very suitable for high temperature measurement.

**Reason (R):** When temperature is high, a physical contact between hot body and thermometer is not desirable.

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 R is false

A is false R is true

⇒ The presence of some holes in an intrinsic semiconductor at room temperature is due to

valence electrons

doping

free electrons

thermal energy

⇒ Atomic number of germanium is

24

28

32

36

⇒ In figure the phase

will be 90° at ω = 0 and 0° at ω = ∞

will be 0° at ω = 0 and 90° at ω = ∞

will be 45° at ω = 0 and 0° at ω = ∞

will be 45° at ω = 0 and 90° at ω = ∞

⇒ Which of the following microphones is used as a standard for calibration?

Moving coil

Carbon

Condenser

Ribbon

⇒ The inverse Fourier transform of δ(

*t*) is

∪(

*t*)

1

δ(

*t*)

*e*

^{j2pt}

⇒ In a transistor I

_{E}= 10 mA, I

_{CO}= 0.5 μA and a = 0.995. Then I

_{CEO}=

100 μA

25 μA

10.1 mA

10.5 mA

⇒

Match the following:

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

A. | Continuous and aperiodic | 1. | Fourier representation is continuous and aperiodic |

B. | Continuous and Periodic | 2. | Fourier representation is discrete and aperiodic |

C. | Discrete and aperiodic | 3. | Fourier representation is continuous and periodic |

D. | Discrete and periodic | 4. | Fourier representation is discrete and periodic |

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

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

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

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

⇒ For a nonlinear resistance

*v*-

*i*plot is not a straight line

resistance increases as current increases

resistance decreases as current increases

current decreases as voltage increases

⇒ Which of the following is a valid real constant in FORTRAN 77?

1.2 E 231

3 E - 2

-3.2 E 2.3

1.2 E 23