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The electrical power to a meggar is provided by permanent magnet D.C. generator.

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In a meggar controlling torque is provided by coil.

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The operating voltage of a meggar is about 100 V.

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_______ electric power is the most common method used by electrical grids to transfer power.  (A) One-phase (B) Two-phase (C) Three-phase (D) None of the above

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Three-phase electric power is the most common method used by electrical grids to transfer power. 

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The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?

Answer :

The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.

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State the importance of electrical power in day to day life. 

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Importance of electrical power in day to day life: 1. Electrical energy is the basic necessity for domestic (residency), commercial, industrial, agriculture, consumers , transport (Electric ... agriculture products. iv) Running motors, furnaces of various kinds in industry, running locomotives 

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Power factor of an electrical circuit is equal to?

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Power factor of an electrical circuit is equal to R/Z, cosine of phase angle difference between current and voltage, kW/kVA.

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Problems on electrical power and energy

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Problem on electrical power and energy 1 : https://youtu.be/ZvWHuMdmv9g Problem on electrical power and energy 2 : https://youtu.be/19IZMc6U2vs Problem on electrical power and energy 3 : https ... : https://youtu.be/iYqGIwA919A Problem on electrical power and energy : https://youtu.be/iWnWQz_mzHk

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Problem on electrical power and energy 7

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Problem on electrical power and energy 6

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Problem on electrical power and energy 6

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Problem on electrical power and energy 5

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Problem on electrical power and energy 5

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List any two types of fuels used in electrical power generation plants.

Answer :

Types of fuels used in electrical power generation plants:  1) Solid fuels: Coal, Biomass: Wood, Nuclear fuel: Uranium, Plutonium  2) Liquid fuels: Diesel, Petrol  3) Gaseous Fuels: Natural gas, Producer ... 2) Wood 3) Uranium 4) Plutonium 5) Diesel 6) Petrol 7) Natural gas 8) Producer gas

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When an alternating current passes through an ohmic resistance the electrical power converted into heat is?

Answer :

When an alternating current passes through an ohmic resistance the electrical power converted into heat is true power.

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Briefly explain how the power factor of an inductive circuit can be improved.

Answer :

As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit. 

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What is electrical instruments?

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A circuit breaker is designed to protect an electrical circuit from damage caused by :  (A) Over load (B) Short circuit (C) Over current (D) All of the above

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A circuit breaker is designed to protect an electrical circuit from damage caused by :  (A) Over load (B) Short circuit (C) Over current (D) All of the above

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In case of locomotives the tractive power is provided by double cylinder, double acting steam engine.

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Describe the following energy conservation methods of electrical motor. i) By motor survey ii) By matching loads with motor rating

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Energy conservation methods of electrical motor:  1) By Motor Survey: Large industries have a massive population of LT motors. Load survey of LT motors can be taken-up methodically to ... -speed motors, eddy-current couplings, fluid couplings, and solid-state electronic variable speed drives.

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The power consumed the element E is equal to the  : P = V x I = 6V x 1 A = 6 W

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In order to have a lower cost of electrical energy generation the load factor  (1) and the diversity factor should be low (2) should be low but the diversity factor should be high (3) should be high but the diversity factor should be low (4) and the diversity factor both should be high

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In order to have a lower cost of electrical energy generation the load factor and the diversity factor both should be high

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Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties. 

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Write measures to be taken to maintain the insulation resistance of electrical machines to healthy levels.

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Define: (i) Resolution, (ii) Calibration, with reference to electrical measuring systems.

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Resolution The smallest increment in input (the quantity being measured) which can be detected with certainty by an instrument is called its resolution or discrimination.  OR It is ... the measuring instrument with standard instrument to find out the error in the instrument under test.

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Laminated cores, in electrical machines, are used to reduce?

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Laminated cores, in electrical machines, are used to reduce eddy current loss.

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To limit the operating temperature an electrical machine should have proper current rating.

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Why is it cheaper to transmit electrical energy at high voltage?

Answer :

Because of the electrical energy was step upped by transformers the transformer have high efficiency than the electric energy is cheaper

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In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be?

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In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be 0.5.

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In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was?

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In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was unity.

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Power for lighting in passanger coach, in a long distance electric train, is provided through individual generator of bogie and batteries.

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In a steam locomotive electric power is provided through small turbo-generator.

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An _____________is a network of electrical components used to supply, transfer and use electric power:  (A) Electric power system (B) Electric power (C) All of the above (D) None of the above

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An Electric power system is a network of electrical components used to supply, transfer and use electric power.

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To protect most of the electrical equipment handling low power, the types of relays used are thermocouple, electronic and bimetallic.

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The resistance of a few meters of wire conductor in closed electrical circuit is?

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The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.

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What is a node in an electrical circuit?

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a positively charged electrons

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What is a drive in electrical controls?

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Briefly explain how an electrical generator converts mechanical energy into electrical energy.

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Working principle of DC generator: * Working principle of DC generator is the principle of dynamically induced emf or electromagnetic induction. * According to this principle, when flux is cut by a conductor, an ... , the flux is cut by the armature winding and an emf is dynamically induced in it. 

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State different types of electrical signal and draw all types of waveforms.

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Types of electrical signals 1) Sine wave 2) Triangular wave 3) Square wave Waveforms

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Explain the need of maintenance of electrical equipment.

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What is the advantage of AC over DC electrical transmission?

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State the external causes of failure of electrical equipment.

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Electrical Measuring Instruments

Answer :

Electrical Measuring Instruments

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GATE 2020 syllabus electrical engineering

Answer :

EE: Electrical Engineering Section 1: Engineering Mathematics Linear Algebra: Matrix Algebra, Systems of linear equations, Eigenvalues, Eigenvectors. Calculus: Mean value theorems, Theorems of ... to dc converters, Single phase and three phase inverters, Sinusoidal pulse width modulation.

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Electrical specifications with values for washing machine. 

Answer :

1. Type: Top loading / Front loading type 2. Capacity range: 6kg to 15kg 3. Motor Used: Induction motor 4. Input voltage: 100V- 240V 5. Power: in 1200W / Output power 100–400W{can go upto 1000W) 6. Efficiency: Max efficiency 31% 7. Wattage: 2.100-2.400 W 8. Current: 13A 9. Frequency: 50hz

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