Define resistivity. State its unit.
Last Answer : Resistivity can be defined as the resistance of a conducting material per unit length with unit area of cross section. Its unit is ohm/meter
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1 answer
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Aug 4, 2019
by
anonymous
What is the smallest unit of a compound with the same chemical characteristics?
Last Answer : The molecule is the smallest unit of a compound with the same chemical characteristics.
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265 views
1 answer
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Jun 29, 2019
by
anonymous
THE UNIT OF RELUCTANCE IS
Last Answer : The si unit of reluctance is Ampere-turn/weber
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229 views
1 answer
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Write the purpose of coal and ash handling unit. Also write different activities that arc carried out in this unit.
Last Answer : Purpose of coal and ash handling unit :- To transport coal from coal storage to power plant. A large quantity of ash about 10 to 30 % produced in furnace, the removal of ash from boiler furnace ... disposed off. Various methods of disposal of ash: Mechanical system. Pneumatic system.
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56 views
1 answer
asked
Sep 8, 2018
by
anonymous
Define admittance and state its unit.
Last Answer : Admittance is defined as the ability of the circuit to carry (admit) alternating current through it. OR It is the reciprocal of impedance Z. i.e Admittance Y = 1/Z. Unit: Its unit is siemen (S) or mho (Ʊ).
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224 views
1 answer
asked
Sep 7, 2018
by
anonymous
What is the SI unit of conductivity ?
Last Answer : The SI unit of conductivity Siemens/m.
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79 views
1 answer
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Sep 2, 2018
by
anonymous
Which unit holds data permanently? (A) Input unit (B) Secondary storage unit (C) Output Unit (D) Primary Memory Unit
Last Answer : Which unit holds data permanently? (A) Input unit (B) Secondary storage unit (C) Output Unit (D) Primary Memory Unit
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171 views
1 answer
asked
May 8, 2018
by
anonymous
The unit heat rate characteristic of a thermal power unit shows : (A) Heat input per kWh of output versus the megawatt output of unit (B) Heat input per kW of output versus the megawatt output ... hour output of unit (D) Heat input per kW of output versus the megawatt hour output of unit
Last Answer : The unit heat rate characteristic of a thermal power unit shows : Heat input per kWh of output versus the megawatt output of unit
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81 views
1 answer
asked
Apr 30, 2018
by
anonymous
Which of the following is the SI unit for admittance? A) Ohm B) Henry C) Farad D) Siemens
Last Answer : Which of the following is the SI unit for admittance? A) Ohm B) Henry C) Farad D) Siemens
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231 views
1 answer
asked
Apr 29, 2018
by
anonymous
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Which of the following is an example of SI derived unit? A) Capacitance (Farad) B) Time (second) C) Luminous intensity (Candela) D) All the above
Last Answer : Which of the following is an example of SI derived unit? A) Capacitance (Farad) B) Time (second) C) Luminous intensity (Candela) D) All the above
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116 views
1 answer
asked
Apr 29, 2018
by
anonymous
Which of the following is a unit of magnetic flux? A) Weber B) Maxwell C) Both A and B D) None of these
Last Answer : Which of the following is a unit of magnetic flux? A) Weber B) Maxwell C) Both A and B D) None of these
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105 views
1 answer
asked
Apr 29, 2018
by
anonymous
What is the SI unit for magnetic reluctance? A) Ampere B) Ampere-turns per weber C) Henry D) None of these
Last Answer : What is the SI unit for magnetic reluctance? A) Ampere B) Ampere-turns per weber C) Henry D) None of these
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351 views
1 answer
asked
Apr 29, 2018
by
anonymous
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The unit of reluctance is?
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67 views
0 answers
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Mar 25, 2018
by
anonymous
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The unit of retentivity is?
Last Answer : The unit of retentivity is weber/sq. m.
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788 views
1 answer
asked
Mar 25, 2018
by
anonymous
The unit of magnetic flux is?
Last Answer : The unit of magnetic flux is weber.
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76 views
1 answer
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Mar 25, 2018
by
anonymous
What is the unit of reactance?
Last Answer : Unit of reactance is Ohms ( Ω ) .Reactance is denoted by X .
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121 views
1 answer
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Jan 7, 2018
by
anonymous
Last Answer : Flux density is denoted by B. And it is given as B = flux/ area Where, the unit of flux is Weber and unit of area is meter square. So the unit of flux density is weber per meter square which is also called as Tesla.
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162 views
2 answers
asked
Sep 30, 2017
by
anonymous
Joule X second is the unit of?
Last Answer : Joule X second is the unit of power .
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56 views
1 answer
asked
Sep 20, 2017
by
anonymous
Last Answer : Unit of power is Watt denoted by capital W .
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94 views
1 answer
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Sep 20, 2017
by
anonymous
Last Answer : Unit of voltage is volt denoted by capital V .
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106 views
1 answer
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Sep 20, 2017
by
anonymous
Last Answer : Unit of resistance is Ohm.
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70 views
1 answer
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Sep 20, 2017
by
anonymous
Last Answer : Unit of work is Joule denoted by capital J .
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71 views
1 answer
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Sep 20, 2017
by
anonymous
Last Answer : Unit of inductance is Henry denoted by capital H .
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95 views
1 answer
asked
Sep 20, 2017
by
anonymous
Consider the sinusoidal voltage waveforms, v1(t) and v2(t), as shown (i) State the frequency and amplitude for both the voltage waveforms. (ii) Calculate the rms value of v1(t) and v2(t), ... time domain. (vii) Calculate the instantaneous value of v2(t) at t = 38 ms.
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57 views
0 answers
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May 19, 2020
by
anonymous
Principal of digital frequency meter.
Last Answer : The basic block diagram of basic digital frequency meter (DFM) is shown in above figure. The signal whose frequency we have to be measured is first to be amplified through amplifier. The output of amplifier ... = Number of counts. t = Time interval between start and stop condition of the gate.
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183 views
2 answers
asked
Aug 21, 2019
by
anonymous
Define the following terms: 1) Virtual height 2) Actual height 3) Critical frequency. 4) Maximum usable frequency.
Last Answer : 1) Virtual height:- The incident and refracted rays follow paths that are exactly the same as they have been if reflection had taken place from a surface located at a greater height, called ... angle of incidence is other than the normal is known as maximum unstable frequency. MUF= fc secθ
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84 views
1 answer
asked
Aug 4, 2019
by
anonymous
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Draw the diagram and explain the working of ferrodynamic type frequency meter.
Last Answer : Ferrodynamic type frequency meter: (Electrical resonance type frequency meter): It consists of a fixed coil. The supply whose frequency is to be measured is connected across it. This coil ... so selected that the moving coil takes up a convenient position when frequency is of normal value.
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6.4k views
1 answer
asked
Sep 6, 2018
by
anonymous
List the different types of frequency meters.
Last Answer : Different types of frequency meters 1. Reed type [Mechanical type] 2. Ferro-dynamic type [Resonances type] 3. Weston type 4. Ratio-meter type 5. Saturable core type 6. Digital type
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82 views
1 answer
asked
Sep 6, 2018
by
anonymous
Explain working of Weston type frequency meter.
Last Answer : Weston Type Frequency Meter: There are two fixed coils marked as A and B. Each coil divided into two equal parts and are fixed such that their magnetic axis are perpendicular to each ... leading to deflections in either direction depending on the currents there in, due to changed impedances.
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3.5k views
2 answers
asked
Sep 5, 2018
by
anonymous
State the application of phase sequence indicator; clip on ammeter, frequency meter & P.F. meter.
Last Answer : Phase Sequence Indicator: 1. For finding correct phase sequence of supply 2. For obtaining exact instant of parallel operation of alternators. 3. For obtaining reversal of rotation ... 4. In electroplating industries 5. In various processes industries for measuring power factor
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146 views
1 answer
asked
Sep 5, 2018
by
anonymous
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List two types of oscillator, which generates frequency in RF range.
Last Answer : Types of Oscillators generating frequencies in RF range: i) Hartley Oscillator ii) Colpitt’s Oscillator iii) Clapp Oscillator
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84 views
1 answer
asked
Sep 5, 2018
by
anonymous
State the need of multistage amplifier. Draw frequency response of R-C coupled amplifier.
Last Answer : The need of multistage amplifier The voltage (or power) gain, obtained from a single stage small signal amplifier, is limited. Therefore, it is not sufficient for all practical applications. Therefore, in ... to use a MULTISTAGE AMPLIFIER . Frequency response of R-C coupled amplifier.
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168 views
1 answer
asked
Sep 5, 2018
by
anonymous
Define: 1) frequency, 2) cycle, 3) time period, 4) amplitude
Last Answer : 1) frequency: The total number of cycles completed in one second is called frequency. Its unit is cycles per second or Hertz (Hz). Its formula is f = 1/ T, where T is time period. ... is second per cycle. 4) amplitude: the maximum instantaneous value of sine wave is called as amplitude.
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387 views
2 answers
asked
Aug 8, 2018
by
anonymous
A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Last Answer : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
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192 views
1 answer
asked
Jun 18, 2018
by
anonymous
A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is A) 7.5 m B) 7.5 Km C) 75 m D) 750 m
Last Answer : A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is 7.5 m
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224 views
1 answer
asked
Jun 18, 2018
by
anonymous
In a series R-C circuit, with the increase in frequency, current (A) Reduces (B) Increases (C) Does not change (D) Becomes zero
Last Answer : In a series R-C circuit, with the increase in frequency, current Increases
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111 views
1 answer
asked
May 8, 2018
by
anonymous
A series R-L-C Circuit has a resonant frequency of 1000 Hz. If the values of R, L and C are doubled, the new resonant frequency is
Last Answer : A series R-L-C Circuit has a resonant frequency of 1000 Hz. If the values of R, L and C are doubled, the new resonant frequency is 500 Hz
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455 views
1 answer
asked
May 8, 2018
by
anonymous
What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be ... Current will be too much high (C) Transformer may start to smoke and burn (D) No effect
Last Answer : What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be ... will be too much high (C) Transformer may start to smoke and burn (D) No effect
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797 views
1 answer
asked
May 8, 2018
by
anonymous
What is the frequency of an alternator which has 2 poles and makes 3600 revolutions per minute? A) 3600 HZ B) 60 Hz C) 120 Hz D) None of these
Last Answer : What is the frequency of an alternator which has 2 poles and makes 3600 revolutions per minute? A) 3600 HZ B) 60 Hz C) 120 Hz D) None of these
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2.7k views
1 answer
asked
Apr 29, 2018
by
anonymous
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What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known
Last Answer : What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known
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119 views
1 answer
asked
Apr 29, 2018
by
anonymous
The frequency of an alternating current is?
Last Answer : The frequency of an alternating current is the number of waves passing through a point in one second.
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102 views
1 answer
asked
Mar 25, 2018
by
anonymous
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The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of?
Last Answer : The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of iron loss in core.
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170 views
1 answer
asked
Mar 25, 2018
by
anonymous
In a series L-C circuit at the resonant frequency the?
Last Answer : In a series L-C circuit at the resonant frequency the current is maximum.
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182 views
1 answer
asked
Mar 25, 2018
by
anonymous
In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of?
Last Answer : In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of L or C.
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1.2k views
1 answer
asked
Mar 25, 2018
by
anonymous
For a frequency of 200 Hz, the time period will be?
Last Answer : For a frequency of 200 Hz, the time period will be 0.005 s.
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313 views
1 answer
asked
Mar 24, 2018
by
anonymous
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Two waves of the same frequency have opposite phase when the phase angle between them is?
Last Answer : Two waves of the same frequency have opposite phase when the phase angle between them is 180°.
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789 views
1 answer
asked
Mar 24, 2018
by
anonymous
Last Answer : A sine wave has a frequency of 50 Hz. Its angular frequency is 100 n radian/second.
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700 views
1 answer
asked
Mar 24, 2018
by
anonymous
How to Install a Home HVAC Unit
Last Answer : How to Install a Home HVAC Unit Installing a two zone home heating, ventilating and air-conditioning (HVAC) system is not for a casual do-it-yourselfer but most aspects of the system past ... have oriented their wire coloring system. It should be done carefully to prevent any possibility of harm.
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9 views
1 answer
asked
May 14, 2021
by
anonymous
A) Watt B) Volts C) Farad D) Ampere
Last Answer : Correct answer: D) Ampere
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2.6k views
1 answer
asked
Jun 28, 2019
by
anonymous
Options: A) WATT B) AMPERE C) VOLTS D) OHM
Last Answer : Correct Answer: A) WATT
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76 views
1 answer
asked
Jun 28, 2019
by
anonymous
