Description : Briefly explain how an electrical generator converts mechanical energy into electrical energy.
Last Answer : 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.
Description : Which of the following converts electric energy into mechanical energy: a. Transformer b. DC generator c. Motor d. AC generator
Last Answer : d. AC generato
Description : What purpose does a generator serve in a hybrid vehicle? (a) It converts nuclear energy 6more nuclear energy. (b)It converts mechanical energy into electrical energy. (c) It converts chemical energy into electrical energy. (d)It converts electrical energy into mechanical energy.
Last Answer : (b)It converts mechanical energy into electrical energy.
Description : A fuel cells converts ………energy into electrical energy A. Mechanical B. Magnetic C. Solar D. Chemical
Last Answer : D. Chemical
Description : When an alternating current passes through an ohmic resistance the electrical power converted into heat is?
Last Answer : When an alternating current passes through an ohmic resistance the electrical power converted into heat is true power.
Description : The Principle of an alternating current generator is based on: a. Coulomb’s law b. Ampere’s law c. Faraday’s law d. Lenz’s law
Last Answer : a. Coulomb’s law
Description : A steam engine converts the heat energy of steam into _____. (1) Electrical energy (2) Chemical energy (3) Mechanical energy (4) Thermal energy
Last Answer : (3) Mechanical energy Explanation: Steam engine, machine for converting heat energy into mechanical energy using steam as a medium, or working fluid.
Description : Thermocouples convert a. heat energy into electrical energy b. heat energy into light energy c. heat energy into mechanical energy d. mechanical energy into heat energy
Last Answer : d. mechanical energy into heat energy
Description : A device which converts chemical energy into electrical energy is called -----? A. motor B. generator C. moving-coil meter D. battery (Answer)
Last Answer : D. battery (Answer)
Description : A photoelectric cell converts – (1) Mechanical energy to electric energy (2) Heat energy to mechanical energy (3) Light energy to chemical energy (4) Light energy to electrical energy
Last Answer : (4) Light energy to electrical energy Explanation: Photoelectric cell or photocell, device whose electrical characteristics (e.g., current, voltage, or resistance) vary when light is incident ... The most common type consists of two electrodes separated by a light-sensitive semiconductor material.
Description : A photo-electric cell converts (1) mechanical energy to electric energy (2) heat energy to mechanical energy (3) light energy to chemical energy (4) light energy to electrical energy
Last Answer : light energy to electrical energy
Description : Heat energy is converted into electrical energy a. solar cells b. thermocouples c. electric generators d. none
Last Answer : b. thermocouples
Description : All electrical appliances are connected in parallel to each other between the main line and neutral wire to get a. same current b. same current and potential difference c. different current but same potential difference d. different current and potential differences
Last Answer : c. different current but same potential difference
Description : What is alternating current?
Last Answer : Bi-directional flow of current in a sinusoidal form with a positive and negative peak.
Description : Alternating current (AC)
Last Answer : AC stands for Alternating Current meaning voltage or current that changes polarity or direction respectively over time. An Alternating Current (AC) is an electric current whose magnitude ... energy are known as alternators and are simpler construction than DC electromechanical generators.
Description : A device that converts mechanical energy into electric energy is called----? A. Motor. B. Transformer. C. Coil. D. Generator?
Last Answer : B. Transformer.
Description : Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties.
Last Answer : Following are requirements of conductor:- i) High conductivity : Material should have high conductivity, So that * cross section of conductor (size) reduces, * Copper losses reduces, * So Efficiency ... . Boiling point is 1820°C 9. Specific gravity is 2.7 10. High resistance to corrosion.
Description : What is the name of the device that converts mechanical energy into electrical energy ?
Last Answer : Generator is a device that converts mechanical energy into electrical energy.
Description : What is the machine that converts mechanical energy or motion into electrical energy?
Last Answer : generator
Description : Which of the following devices converts electrical energy into mechanical energy? (a) Dynamo (b) Transformer (c) Electric motor (d) Inductor
Last Answer : Ans:(c)
Description : A dynamo is a device which – (1) creates mechanical energy (2) creates electrical energy (3) converts mechanical energy into electrical energy (4) converts electrical energy into mechanical energy
Last Answer : (3) converts mechanical energy into electrical energy Explanation: A dynamo is an electrical generator that produces direct current with the use of a commutator. Dynamos were the first electrical ... based, including the electric motor, the alternating-current alternator, and the rotary converter.
Description : A transformer – (1) converts DC to AC (2) is used to decrease or increase AC voltage (3) converts AC voltage to D.C. voltage (4) converts electrical energy into mechanical energy
Last Answer : (2) is used to decrease or increase AC voltage Explanation: Transformers have made longdistance transmission of electric power a practical reality, as AC voltage can be "stepped up" and ... the loads), voltage levels are reduced by transformers for safer operation and less expensive equipment.
Description : A dynamo converts ______. (1) Mechanical energy into sound energy (2) Mechanical energy into electrical energy (3) Electrical energy into mechanical energy (4) None of these
Last Answer : (2) Mechanical energy into electrical energy Explanation The dynamo, by attaching it in between the two tires, converts the mechanical energy (which of course, is produced by paddling) into electrical energy, and by connecting the wires going out of the dynamo to light, it glows without any flaw.
Description : The electric motor converts - (1) Electrical energy into mechanical energy (2) Mechanical energy into electrical energy (3) Electrical energy into light energy (4) None of these
Last Answer : (1) Electrical energy into mechanical energy Explanation: A generator converts mechanical energy into electrical energy, while a motor does the opposite - it converts electrical energy into mechanical energy.
Description : The Dynamo converts – (1) Electrical Energy into Mechanical Energy (2) Mechanical Energy into Magnetic Energy (3) None of these (4) Mechanical Energy into Electrical Energy
Last Answer : (4) Mechanical Energy into Electrical Energy Explanation: Dynamo is a device for converting mechanical energy into electrical energy, especially one that produces direct current. It uses electromagnetic ... mechanical rotation into a pulsing direct electric current through the use of a commutator.
Description : The dynamo converts – (1) mechanical energy into electrical energy (2) electrical energy into mechanical energy (3) mechanical energy into magnetic energy (4) magnetic energy into mechanical energy
Last Answer : (1) mechanical energy into electrical energy
Description : DC motors converts electrical into ___ energy. A. Mechanical B. Wind C. Electric D. None
Last Answer : A. Mechanical
Description : The Dynamo converts (1) Electrical Energy into Mechanical Energy (2) Mechanical Energy into Magnetic Energy (3) None of these (4) Mechanical Energy into Electrical Energy
Last Answer : Mechanical Energy into Electrical Energy
Description : The dynamo converts (1) mechanical energy into electrical energy (2) electrical energy into mechanical energy (3) mechanical energy into magnetic energy (4) magnetic energy into mechanical energy
Last Answer : mechanical energy into electrical energy
Description : A transformer (1) converts DC to AC (2) is used to decrease or increase AC voltage (3) converts AC voltage to D.C. voltage (4) converts electrical energy into mechanical energy
Last Answer : is used to decrease or increase AC voltage
Description : A dynamo is a device which (1) creates mechanical energy (2) creates electrical energy (3) converts mechanical energy into electrical energy (4) converts electrical energy into mechanical energy
Last Answer : converts mechanical energy into electrical energy
Description : The sum of potential energy and kinetic energy is known as : (1) Electrical energy (2) Chemical energy (3) Light energy (4) Mechanical energy
Last Answer : (4) Mechanical energy Explanation: In physical sciences, mechanical energy is the sum ofpotential energy and kinetic energy. It is the energy associated with the motion and position of an object.
Description : ___________ converts electrical energy into chemical energy. a) Galvanic cell b) Voltaic cell c) Electrolytic cell d) Leclanche cell
Last Answer : c) Electrolytic cell
Description : In fuel cell the __________ energy is converted into electrical energy. (A) Mechanical (B) Chemical (C) Heat (D) Sound
Last Answer : In fuel cell the Chemical energy is converted into electrical energy.
Description : A multipurpose instrument for measuring current, potential difference and resistance is a) Ohmmeter b) Astatic galvanometer c) Rheostat d) AVO Meter
Last Answer : d) AVO Meter
Description : In an alternating current electrical system, a low system power factor is a direct sign of _____________. A. wasted energy B. efficient operation C. a short in the exciter field windings D. an excessive number of minor system grounds
Last Answer : Answer: A
Description : Electrical energy is converted to heat at the rate of a. IRt b. I 2R c. I 2Rt d. VIt
Last Answer : b. I 2R
Description : Problems on electrical power and energy
Last Answer : 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
Description : Problem on electrical power and energy 2
Last Answer : Problem on electrical power and energy 2
Description : Problem on electrical power and energy 1
Last Answer : Problem on electrical power and energy 1
Description : Problem on electrical power and energy 7
Last Answer : Problem on electrical power and energy 7
Description : Problem on electrical power and energy 6
Last Answer : Problem on electrical power and energy 6
Description : Problem on electrical power and energy 5
Last Answer : Problem on electrical power and energy 5
Description : State the need of energy conservation in electrical motor.
Last Answer : Need of energy conservation in Electrical motors: 1. Induction motors are used as electrical drives in industrial, commercial and residential sectors. 2. Considering all industrial applications, 70% of ... system. 8. To adopt advanced technology in design and to use better quality materials.
Description : Describe the following energy conservation methods of electrical motor. i) By motor survey ii) By matching loads with motor rating
Last Answer : 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.
Description : 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
Last Answer : In order to have a lower cost of electrical energy generation the load factor and the diversity factor both should be high
Description : Why is it cheaper to transmit electrical energy at high voltage?
Last Answer : Because of the electrical energy was step upped by transformers the transformer have high efficiency than the electric energy is cheaper