# What supplies energy to move through a circuit?

What supplies energy to move through a circuit?

A  potentiall  diffrence  provides  sunction  pressure.

## Related questions

Description : A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ohm. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is

Answer : A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ohm. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is 0.87

Description : A battery of e.m.f. 12V supplies a current of 5A for 2 minutes. How much energy is supplied in this time?

Description : Consider a circuit with four 10 Ω resistors connected in parallel and the current flowing through the circuit is 5 A. What will be the current if the above 4 resistors are connected in parallel? A) 5 A B) 50 A C) 500 A D) None of these

Answer : Consider a circuit with four 10 Ω resistors connected in parallel and the current flowing through the circuit is 5 A. What will be the current if the above 4 resistors are connected in parallel? A) 5 A B) 50 A C) 500 A D) None of these

Description : A 200 V, 5 A d.c. energy meter is tested at its marked ratings. The resistance of the pressure circuit is 8000 Ω and that of current coil is 0.1 Ω. The power consumed when testing the meter with phantom loading with current circuit excited by a 6 V battery is (A) 2.5 W (B) 5 W (C) 32.5 W (D) 35 W

Answer : A 200 V, 5 A d.c. energy meter is tested at its marked ratings. The resistance of the pressure circuit is 8000 Ω and that of current coil is 0.1 Ω. The power consumed when testing the meter with phantom loading with current circuit excited by a 6 V battery is 35 W

Description :  An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V

Answer :  An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V

Description : What is mass energy equivalence? Give one example. Define mass defect and binding energy.

Answer : Mass energy equivalence:-   The physical principle that a measured quantity of energy is equivalent to a measured quantity of mass. The equivalence is expressed by Einstein's equation E = mc ... of energy that must be supplied to a nucleus to completely separate its nuclear articles (nucleons)

Description : What is renewable source of energy? State two examples for the same.

Answer : Renewable (Primary) Energy sources: It is defined as the sources that can be used again and again for the generation of electrical energy are called renewable.  Following are the some list ... ) and carbon dioxide  6. Geothermal Energy  Geothermal Electricity Production  7. Fuel Cells

Description : What is meant by energy meter constant?

Answer : Energy Meter Constant  A fixed value which is used when converting meter readings to actual energy use, especially when potential transformers and similar types of equipment are used in metering. For example, K=--------rev/Kwh

Description : What is the stored energy when 200 V is applied across a 7 μF capacitor? A) 1400 Joules B) 0.7 Joules C) 0.14 Joules D) None of these

Answer : What is the stored energy when 200 V is applied across a 7 μF capacitor? A) 1400 Joules B) 0.7 Joules C) 0.14 Joules D) None of these

Description : what is the source of energy for satellite ?

Answer : The source of energy for the satellites are its solar panels which generate power by themselves. But, to reach the orbit , it uses the fuel to push the rocket . It needs fuel to power the ... solar panels , hence solar power is produced which is ud=sed to power the internal use of satellite.

Description : Electric current passing through the circuit produces?

Answer : Electric current passing through the circuit produces thermal effect.

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

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 : State the Principle of energy conservation.

Answer : Principle of energy conservation: The law of conservation of energy states that the total energy of an isolated system remains constant-it is said to be conserved over time. Energy can neither be ... due to burning of fuels, greenhouse gases and avoid harmful effects on all livings on earth.

Description : Blackt Electrotech 230V 24x7 Energy Saving Socket Type Digital Programmable Plastic Electronic Timer (White)

Description : Energy stored in electrostatic field of capacitance formula

Answer : Energy stored in electrostatic field of capacitance formula

Description : Energy stored in capacitor examples

Answer : Energy stored in capacitor examples

Description : Problems on electrical power and energy

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

Answer : Problem on electrical power and energy 2

Description : Problem on electrical power and energy 1

Answer : Problem on electrical power and energy 1

Description : Problem on electrical power and energy 7

Answer : Problem on electrical power and energy 7

Description : Problem on electrical power and energy 6

Answer : Problem on electrical power and energy 6

Description : Problem on electrical power and energy 5

Answer : Problem on electrical power and energy 5

Description : Write how energy can be stored or generated in each of following : i) solar cell ii) geothermal energy iii) hydrogen energy in biomass.

Answer : i) Solar cell : Energy can be stored:  1. Storage Battery is used to store electricity.  OR   Energy can be generated  1. Directly Conversion:   a) By use of P.V Cell ( ... fuels in engines:-  3. The biomass is subjected to fermentation process to obtain a gaseous fuel called biomass

Description : Explain the importance of solar power in the energy deficient India.

Answer : Mainly electricity generated in India is from -  Hydro power plant  Thermal power plant  Nuclear power plant  BUT,  To construct new Hydro power plant following are problem :- 1. There is ... start) 10. It saves the fossil fuel (coal, diesel, oil etc.) which are limited available.

Description : List any four sources of energy.

Answer : List of sources of energy:-  1. Hydro energy (P.E. of water)  2. Nuclear energy (Heat is produced by fission processes of U235)  3. Fossil fuels:  i) Thermal energy (by combustion of coal) ... -65 % in volume) and carbon dioxide  7. Fuel Cells (hydrogen)  b) Name any two thermal power

Description : Draw the block diagram of basic wind energy conversion system and write function of each block.

Answer : Block diagram of basic wind energy conversion system: OR Components of wind power plant and their functions:  1) Rotor /Blade/Aero-turbine: Blade extracts significant power from the ... stronger and smoother. Towers are supports to raise the main part of the turbine up in the air.

Description : State any four advantages of wind energy.

Answer : Advantages of wind energy system: 1. Wind input (energy) is freely available 2. Wind energy is inexhaustible 3. There is no air pollution 4. No fuel transportation cost. 5. No space is required to store ... cost per unit is less and is goes on decreasing day by day. 15. Maintenance cost is less.

Description : Explain with schematic diagram direct distribution of solar energy.

Answer : Explain with schematic diagram direct distribution of solar energy: Solar energy reaching earth's surface consists of two components: i) Direct solar energy, ii) Diffused solar energy. Direct solar energy ... radiation. It is very intense radiation and it can produce sun burns and shadows.

Description : Compare conventional energy sources with renewable energy sources on any four points.

Answer : Points Conventional Energy Sources Renewable Energy Sources Availability Limited Unlimited Cost of Fuel High depending on fuel.  Negligible Amount of Power generated On large scale due ... should be selected at source For example HPP, TPP, NPP SPP and WPP

Description : State any two limitations of wind energy.

Answer : Limitations of wind energy: 1) Wind turbine produces noise. 2) Its efficiency is less (20% to 30%) 3) There is limitation on site selection. 4) Transportation cost of wind tower and accessories is high ... No firm power. 7) Power generation is not in phase with the demand. 8) Generation is costly.

Description : Draw a block diagram of electronic energy meter. Write function of each block.

Answer : Electronic Energymeter  Functions of components/blocks: - CT reduces current to reasonable value for current scaling network. - Voltage & current scaling networks reduce proportionally the voltage ... ADC converts the square wave frequency analog output to display the energy in watthour.

Description : State the function and shape of following parts used in induction type energy meter: i) Series magnet ii) Shunt magnet iii) Al disc iv) Brake magnet

Answer : i) Series magnet: produce flux proportional to current (load current) of circuit and interact in the aluminum disc with flux produced by voltage magnet for torque production. Its shape is like letter U.  ii) ... : brakes the motion of the aluminum disc or slows it down. Its shape is like letter C.

Description : State the meaning of creeping error in 1 phase energy meter.

Answer : Creeping error: It is defined as the slow and continuous rotation of the disc of the energy-meter when only pressure coil is energized with no current in the current coil (load current = 0). ... magnet on this iron wire is sufficient to prevent continues rotation of the disc on no load condition.

Description : Draw a neat sketch of 1-ph induction type energy meter and write operating principle of it.

Answer : Operating Principal:- The disc is placed between the two-flux due to pressure coil and flux due to current coil, which will set up torque on the disc which is proportional to power causing the ... is proportional to voltage, the second carries a current coil so its flux is proportional to current.

Description : Draw and describe working of electronic energy meter.

Answer : working of electronic energy meter:- 1. CT reduces current to reasonable value for current scaling network. 2. Voltage & current scaling networks reduce proportionally the voltage & ... The ADC converts the square wave frequency analog output to display the energy in watthour.

Description : Define energy. Write unit of it.

Answer : Energy :-  Electrical energy is defined as the work done in moving electrical charge in electrical fields over specific time duration  OR  The total power delivered or consumed by consumer over specific time duration.  ... the power w.r.t. time  Unit :- Its Unit in watt sec., WHr., KWHr.

Description : With neat diagram explain calibration of energy meter by direct loading method.

Answer : Calibration of Energy Meter by Direct Loading Method:  There are three methods for testing/calibration:  1. Long period dial test  2. Using rotary sub- standard meter  3. Using precision grade instruments  All ... of substandard meter in kWh  Then % error = [(D - DS)/DS] x 100

Description : Why energy meter is integrating type measuring instrument?

Answer : Energy Meter is Integrating Type Measuring Instrument: Energy meter is used for measurement of energy, which is obtained by integration (summation) of power supplied over the particular time duration, hence it the integrating type measuring instrument.

Description : Write any two advantages of digital energy meter.

Answer : Advantages of Digital Energy Meter: 1) Easy to read. 2) High accuracy 3) High resolution. 4) No frictional losses as there are no moving parts. 5) No requirement for external adjustments. 6) Large ... due to absence of moving parts. 7) Highly efficient. 8) Very much compact. 9) Good reliability.

Description : List any four errors in induction type energy meter. Give method of compensation for each.

Answer : Errors in Induction Type Energy Meter with their Compensation:  1) Error due to friction: This error can be compensated by the additional shading band provided on the shunt electromagnet.  2) Phase ... error: This error can be compensated by providing a flux diverter' to the current magnet.

Description : Derive an expression for energy stored in a magnetic field .

Answer : Expression for energy stored in a magnetic field: The energy is stored in magnetic field when current increases and return back when the current decreases. At instant t' seconds after closer of switch ... energy absorbed by the magnetic field when current increases from 0 to I amperes

Description : In fuel cell the __________ energy is converted into electrical energy.  (A) Mechanical (B) Chemical (C) Heat (D) Sound

Answer : In fuel cell the Chemical energy is converted into electrical energy.

Description : The energy radiated by Sun on a bright Sunny day is approximately:  (A) 700 W/m² (B) 800 W / m² (C) 1 kW / m² (D) 2 kW / m²

Answer : The energy radiated by Sun on a bright Sunny day is approximately: 1 kW / m²

Description : The transfer of energy for reaction turbines is based on _______ A) Newton’s first law B) Newton’s second law C) Newton’s third law D) All the above

Answer : The transfer of energy for reaction turbines is based on Newton’s third law

Description : The double energy transient occur in the?

Answer : The double energy transient occur in the R-L-C circuit.

Description : What is Time of Day tariff? How it help in energy conservation?

Answer : Time-off-day tariff:- In addition to basic tariff (Maximum Demand Tariff / KVA Maximum Demand Tariff / Load factor tariff /also the tariff in which P.F. of industrial consumer is taken ... the rated load for longer times of the day their overall efficiency gets higher helping to conserve energy.

Description : what is fermi energy

Answer : Fermi energy is the part of electron band diagram.Fermi energy is highest energy that the electron assume at T = 0 K. Fermi level comes in between conduction band and valance band. In case of ... , In case of semiconductor energy gap is small, And in case of conductor energy gap is overlap.

Description : What is the definition of wind energy?

Answer : Motion of atmosphere of earth is called wind and its kinetic energy is called wind energy