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Q1. | What is the major cause of creeping in an energy-meter? |

A. | Over compensation for friction [Correct Answer] |

B. | Mechanical vibrations [Wrong Answer] |

C. | Excessive voltage across the potential coil [Wrong Answer] |

D. | Stray magnetic fields [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 ideal rectifier should have

100% efficiency, zero ripple factor, zero harmonic factor and unity displacement factor

100% efficiency, zero tipple factor, zero harmonic factor and zero displacement factor

100% efficiency, zero ripple factor, unity harmonic factor and unity displacement factor

100% efficiency, unity ripple factor, zero harmonic factor and unity displacement factor

⇒ The

*z*transform of sequence

*x*[

*n*] = {2, 4, 3, 2}

2

*z*

^{-1}+ 4

*z*

^{-2}+ 3 + 2

*z*

^{+1}

2

*z*

^{-1}+ 3 + 4

*z*

^{+1}+ + 2

*z*

^{+2}

2

*z*

^{+1}+ 3

*z*

^{-1}+ 4

*z*

^{-2}+ 2

*z*

^{-3}

3 + 2

*z*

^{-1}+ 4

*z*

^{-2}+ 2

*z*

^{-1}

⇒ A single phase step up cycloconverter changes 50 Hz to 100 Hz. Then one half wave of input will give rise to

one half wave of output

one full wave of output

two full waves of output

either (b) or (c)

⇒ Which one of the following effects is used in measuring power?

Seeback

Ferrari

Induction

Hall

⇒ In a practical oscillator, the magnitude of loop gain Aβ is kept slightly larger than unity and the amplitude of oscillations is limited by

the ratio of A to β

the on set of non-linearity of amplifying device

the linearity of amplifying device

all of the above

⇒ Purpose of antenna is

to transmit and receive energy

to convert EM into electrical

to convert electrical into EM

all of the above

⇒ When transient and steady state response require improvement;

*a*__________ is used.

Lead compensator

Lag - Lead compensator

Lag compensator

Integrator

⇒ For the circuit of figure the input and output Miller resistances

5 kΩ each

1 ohm and 5 kΩ respectively

5 kΩ and 1 ohm respectively

1 ohm each

⇒ If the secondary burden of a CT 15 VA and secondary current is 5 A, the load impedance of CT is

0.6 Ω

5 Ω

6 Ω

10 Ω

⇒ In figure the coordinates of Q point on the load line are (Neglect V

_{BEIC = 10 mA, VCE = 15 VIC = 5 mA, VCE = 22.5 VIC = 5 mA, VCE = 15 VIC = 10 mA, VCE = 22.5 V}

⇒ In a certain network not containing any dependent sources, number of nodes = 4 and number of branches is equal to 6.

4

2

3

5

⇒ The F.T. of a conjugate symmetric function is always

imaginary

real

conjugate Unsymmetric

conjugate symmetric

⇒ The wave applied to X plates, for ohtaining trace of voltage wave, is

sawtooth wave

sinusoidal wave

rectangular wave

either (a) or (c)

⇒ Hysteresis loss in a transformer working at 220 V and at a frequency of 50 Hz is 100 W. When the transformer is operated at 220 V and at a frequency of 100 Hz, what is the hysteresis loss?

50 W

100 W

200 W

400 W

⇒

Match the following:

List I (Oscillator) | List II (Features) | ||
---|---|---|---|

A. | Wien Bridge | 1. | RF oscillator, uses two inductors and one capacitor |

B. | Colpitt's | 2. | LC oscillator for radio frequencies uses three capacitances and one inductance |

C. | Hartley | 3. | RC oscillator for audio frequencies |

D. | Clapp | 4. | RF oscillator, uses two capacitances and one inductance |

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

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

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

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

⇒

**Assertion (A):** The forward dynamic resistance of *p*-*n* diode varies inversely with current.

**Reason (R):** The forward dynamic resistance of *p*-*n* diode varies with the operating voltage.

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

⇒ Which of the following algorithms design techniques is used in quick sort algorithm?

Dynamic programming

Backtracking

Divide and conquer

Greedy

⇒ Which of the following is a circularly polarized antenna?

Rhombic

Circular loop

Helical

Yagi

⇒ A planar array radar uses a high gain planar array antenna.

TRUE

FALSE

⇒

Match the following:

List I (Power device) | List II (Max. frequency) | ||
---|---|---|---|

A. | Power Bipolar | 1. | MHz |

B. | Power MOSFET | 2. | 100 kHz |

C. | SCR | 3. | 10 kHz |

D. | Insulated gate bipolar transistor | 4. | 1 kHz |

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

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

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

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

⇒ Which of the following statements is incorrect?

A mesh with two resistors has two mesh currents

The algebraic sum of all voltages around any mesh or any loop must be zero

The principle node is a function where branch current can divide or combine

A Norton is a series circuit

⇒ In figure I

_{D}= 4 mA. Then V

_{S20 V4.4 V0.4 V0.44 V}

⇒ Which of the following statement regarding link loss for a satellite is wrong?

For fixed antenna, it is inversely proportional to

*f*

^{2}

For fixed frequency, it is inversely proportional to the product of the antenna aperture areas

For a given satellite operating at a given frequency, it is inversely proportional to

Loss in down-link is negligible as compared to that in uplink

⇒ In a specimen of ferromagnetic material, as the flux density is increased from zero to 2.5 T, µ

_{r}will

increase

decrease

first decrease then increase

first increase then decrease

⇒ The frequency of oscillations obtained from a reflex klystron depends mainly on

resonant frequency of cavity

repeller voltage

voltage of focussing electrode

characteristics of cathode

⇒ A series RLC circuit has Q = 5. A voltage of 10 V rms is applied to it. At resonance, the voltage across C is

10 V rms

10 V peak

50 V rms

50 V peak

⇒ Available multiplexer IC package can have a maximum of 8 inputs.

TRUE

FALSE

⇒ At midband frequencies the coupling capacitor in RC coupled CE amplifier may be considered as

open circuit

short circuit

a reactance equal to load resistance

none of the above

⇒ In a line with finite attenuation

power transmission is least efficient when there are no standing waves on the line

power transmission is most efficient when there are no standing waves on line

Load power depends on phase constant

standing waves will always exist on the line

⇒ 8085 data bus has 8 lines and is bidirectional.

TRUE

FALSE