Test & answers of electrical-p2

 Test & answers of electrical-p2

51. What is a series circuit, exactly?

52. What are a series circuit's characteristics?

53. What’s a parallel circuit number?

54. What features distinguish a parallel circuit?

55. When three identical resistances are linked together, either (1) series or (2) parallel, what would the total resistance be?

56. What is conductance, exactly?

57. What is EMF, potential difference, and current (number)?

58. What precisely is voltage?

59. What are E.M.F., potential difference, and current measured in?

60. What is voltage drop, exactly?

61. What is the terminal voltage formula?

62. What is a potential gradient, exactly?

63. What would occur to the remaining lamps if one bulb in a series or a parallel connection of more than three lamps fuses?

64. What do you mean by E.M.F. and probable call differences?

65. How will you link the cell so that you can enhance the e.m.f. and the supply of current, respectively?

66. If a battery has six 2-volt cells connected in both (1) series and (2) parallel, what will the e.m.f. be?

67. If six 0.3 ohm batteries are linked in both series and parallel, what will the resistance inside of the battery be?

68. What are Kirchhoff's laws, exactly?

69. What exactly do you mean by an electrical network number?

70. What exactly do you mean by "active network" and "passive network"?

71. What exactly do you mean when you say a network is linear or non-linear?

72. What exactly do you understand by the terms "bilateral"?

73. What do you mean when you say "unilateral" circuit" ?

74. What is it that you mean by "Eddy Current"?

75. Define the terms "electrical work," "electrical power," and "electrical energy."

76. What are the measurements for electrical energy and power?

77. Explain the terms "British HP" and "Metric HP."

What connection exists between horsepower and kilowatts?

79. Provide three power formulas.

80. What connection exists between power, resistance, and volts?

81. What is B.O.T.U., you ask?

82. How can you determine a light's electrical resistance using the voltage provided and the watt monogram?

83. Whose resistance between a 25-watt and a 200-watt lamp at the same voltage is greater?

84. What happens when a 220-volt supply is hooked up in series with a (110 V, 25 watts lamp and an 11-volt, 200-watt lamp?

85. When connected to a 110-volt supply, what quantity of energy will the 220 V & 60 watts lamp use?

86. The wiring for the 1000-watt heater is 5 meters long. If the wire's length is cut in half, what will the heater's capacity be?

87. The power factor is equivalent to which of the values that follow:

A. The product of apparent power and genuine power

B. Dividing true power by apparent power

C. Multiplying watts by amps

D. None of the preceding

88. Which of the following describes how resistance and reactance work together to oppose current:

A. Impedance. 

B. "Z"

C. above’s

D. None of the preceding

89. The place where the decrease in voltage is the smallest will be where the flow of electricity across a conductor is greatest.

True or false

90. Which of the following is a three-horsepower motor's equivalent in watts?

A.746 watts 

B. 2238 watts 

C.3000 watts,

D. None of the preceding

 

91. The rotor slots in squirrel case indication motors are typically somewhat skewed for the following reasons:

a) To boost the tensile strength of the bars that hold the rotor and hence strength;

b) To lessen the magnetic hum and locking propensity of the rotor;

c) To see the copper used;

d) To make fabrication easier

 

92. Define Atomic Arrangement

93. Specify the Valence shell

94. Describe the fundamental elements of an ideal electric circuit.

95. What does energy conservation mean?

96. Define conventional theory 

97. What are the Processes for Generating Voltage (Electricity)?

98. How friction produces an electric field 

99. How heat generates electromagnetic fields

50. There are three ways to combine different types of resistance: series, parallel, and series-parallel mixed.

51. A series circuit is one in which each device receives the same amount of current.

52. A series circuit has the following characteristics: All resistances in a series circuit experience the same amount of current flow. The total amount of the voltage drops across each resistance equals the total voltage drop throughout the combination.

53. A parallel circuit is an assortment of circuits in which the current is divided, and a portion passes through each connected component.

54. The total of the currents passing through each resistance determines the overall current, which divides. Each resistance receives the same voltage. The overall or comparable resistance reduces relative to the least significant component.

55. (A) Total resistance in series, R_eq, is three times each resistance, or R+R+R=3R. (b) When working in parallel, 1/R_eq equals 1/R plus 1/R plus 1/R, which equals 3/R, or R_eq equals R/3, which indicates that the overall resistance is equivalent to one-third of each resistance.

56. It is a material's property to conduct current easily. It measures in mho.

57. Electromotive force is the force that exerts pressure on a conductor in a closed circuit, causing electrons to flow across it. The difference in electrical pressure and the voltage between two places in a circuit to generate a flow of current between those points is referred to as the potential difference. The rate of the flow of electrons in any conductor is known as current.

58. Voltage, expressed in terms of electromotive force, is the electrical supply's potential. It is measured in volts.

59. The units of E.M.F., potential difference, and current are ampere and volt, respectively.

60. The reduction in potential across a conductor's surface or in equipment where a current flows against resistance is known as a drop in voltage or potential drop.

61. Terminal voltage = E.M.F - Voltage loss within the source of input.

62. The potential gradient is the rate at which potential changes in space are about distance.

63. None will glow as a result of the circuit breaker. As usual, other lamps will shine.

64. The voltage across a cell's terminals in an open circuit is referred to as the E.M.F, whereas the voltage across a cell's terminals, while it is under load is referred to as the potential difference.

65. Both in parallel and in series.

66. (2 volts) and (a) 6 2 volts equals 12 volts.

67. (A) 0.3 ohm multiplied by six equals 1.8 ohms; (b) 0.3 ohm multiplied by six equals 0.05 ohm.

68. The algebraic total of the currents of electricity that meet at a place in any system of wires is zero.

Voltage law states that each closed circuit and mesh has electromotive forces that when added together algebraically, are equal to the product of the resistance in every part of the system and the currents that flow through it.

The Kirchhoff laws hold for both ac and dc circuits. Any self-inductance EMF or EMF present across a capacitor must be considered in an A.c Circuit.

69. An electrical system is a grouping of electrical components, including resistors, and energy sources, that are wired to create interconnected circuits to meet certain requirements.

70. An "active network" is an electric network with one or more e.m.f. Unlike a "passive network," sources are electric networks without e.m.f. Sources.

71. A linear network, is a network of electrical components where its parameters of resistance, inductance, and capacitance are unchanged about current or voltage and where the voltage or current of sources are either independent. Non-linear networks, are networks of electrical components wherein the parameters fluctuate depending on the current or voltage rather than remaining constant.

72. Bilateral is an identical electrical circuit in both directions, such as a transmission line.

73. A unilateral circuit is an electrical circuit where the attributes vary as the direction of the current changes, such as in a vacuum tube rectifier.

74. Eddy current, also known as Foucault current, is the flow of electricity caused by changes in the magnetic flux inside conducting bodies.

75. When an electric charge moves under a potential difference, electrical work is said to have occurred.

Electrical power is the transmission rate of electrical energy, such as the rate of electrical work performed to mark a stream of change ‘Q’ beneath a potential difference ‘V.’

The amount of electricity used is the quantity of work completed and is equivalent to the power multiplied by the time factor.

76. Watts are used to measure electrical power. Watt-hour (Wh) is the symbol of electrical energy.

77. In the F.P.S. system, a British horse's power is a mechanical unit for power when it performs work at an average speed of 550 ft-lbs/sec and 33,000 ft-lbs/min. In the M.K.S. system, a metric horsepower is a mechanical unit equal to power when it performs work at a rate of 75 kg-m/sec and 4500 kg-m/min.

78. 1 HP (British) equals 746 watts or 0.746 kW.

H.P. (Metric) = o.7355 kW or 735.5 watts.

79. W = V²/R, W = V.I, and W = I²R

80. ([Voltage (V)] ²/ (Resistance (R)) = Power (W)

Watt is calculated as follows: ((Volts) 2/ (Ohm)).

81. Board of Trade Units (B.O.T.U.s) are commercial units of electrical energy that serve as the foundation for charging electrical energy. It also goes by the name kWh. Unit.

82. Power equation: W = V²/R. Resistance is defined as ((Voltage) ²/Wattage), 

83. R = V²/W. The relationship between resistance and lamp wattage is inverse when the voltage is constant.

Therefore, a lamp with a lower wattage of 25 W will have more resistance than a bulb with a higher wattage of 200 W.

84. As a result of the higher voltage drop than the lamp's rated voltage and the higher resistance of the W lamp, it will explode.

85. The lamp's resistance, which still consumes the same amount of power, is proportional to the voltage square, according to the formula W = V2/R. As a result, when the voltage is cut to half the specified voltage, the power consumption is cut to (1/2)2, or 14 of 60W, or 15 watts.

86. W1 = V²/R power

When the length is cut in half, the resistance will also be reduced by one-half.

V²/R equals 2 times W1.If W1 is 1000 W, W2 is 2 x 1000 W, or 2000 W, for a half-length.

87. B

88. C

89. True

90. B

91. B

92. The smallest component of matter is the atom. Three components comprise an atom nucleus, located in the atom's heart and made up in part of positively charged protons. The remainder of the nucleus comprises neutrons, which are uncharged particles. Negatively charged electrons also circle the nucleus

93. The core of an atom is surrounded by a set number of shells, each of which has a specific number of electrons, .i.e. the first shell: two electrons 

94. The essential components of a perfect electric circuit are:

• Electric storage is the main electrical sources that supply electricity to the circuit.
• Switches and additional devices resembling potentiometers are the major controlling devices used to regulate electricity.
• Electric fuses, and switch gear systems are protection devices.
• Conducting paths are used in circuits to move electric current from 1 junction to another.

95. Energy cannot be generated and destroyed, according to this. Energy can, however, be changed from one kind to another.

96. This (incorrect) convention continues to exist now before the real nature of electrical energy became known, scientists assumed the flow of current had resulted from the flow of positively charged particles.

97. The energy transmitted per unit when electricity turns into another energy is known as the potential difference. The following are EMF types:

Friction

Chemical

Pressure

Heat

Light

Magnetism

98. Effect happens when electrons transfer, leading one item to turn a negative charge and another object takes on a positive charge .When the attraction between the electrons and the positively charged particle is sufficiently strong that it causes an electrostatic discharge.

99. They desire to move to the cold side, which is positive, and the electrons on the heated side, which is negative, do this. When the pilot lights are illuminated, the thermocouple experiences a voltage. When the boiler requests it, this voltage enables a relay to turn on and allow gas to flow. No voltage exists if the pilot lights are out. As a result, the furnace can request gas but not get it because the relay won't be on.