Electric motor class 10, magnetic effects of electric current. Dec 02, 20 an electric motor is a type of prime mover for a mechanical system. Latest edition of ncert books and solutions is available here. Motor control and protection in accordance with standards iec 9472 and iec 94741. Prepared according to the latest cbse syllabus, these solutions provide elaborate answers in simple language for a better understanding of students. For instance, a 230 volt motor operating at 207 volts 90% of rated loses. Sal shows that there will be a net torque on a loop of current in a wire. This chapter has eighteen questions and will help you understand different constituents of electricity and current flow in a circuit. An electric motor is an electrical machine that converts electrical energy into mechanical. Ul listed for group motor applications when used alone or in combination with tesys dline contactors in accordance with nec 43053. Although there is no industry standard that defines the life of an electric motor, it is. Mcq questions for class 10 science magnetic effects of. A force acts on the coil which rotates it continuously. Overload relay trip curves selection index schneider electric.
Electric motor is a device that converts electrical energy to mechanical energy parts of a electric motor. Instead, the commutation of the windings of a bdc motor is done mechanically. A split ring acts just like a commutator in the electric motor. A motor is a device which converts electrical energy into mechanical energy. In an electric motor, a rectangular coil is suspended between the two poles north and. Cbse class 10 science chapter magnetic effects of. Brief notes on magnetic effect of electric current class 10. Electric motor hindi magnetic effect of electric current physics khan academy duration. Electric motor magnetic effects of electric current. Students can solve ncert class 10 science magnetic effects of electric current multiple choice questions with answers to know their preparation level. Lets learn the working of an electric motor, which converts electricity into a rotation. Principle of an electric motor electric motor works on the principle that a current carrying conductor placed in a magnetic field experiences a force. The two ends of coil abcd are connected to the two terminals of a battery through split ring commutators c 1 and c 2 and brushes b 1 and b 2.
Ncert solutions class 10 science pdf download free. What does the trip class 10, class 20 and class 30 mean. By studying vedantu science notes, you will surely be able to answer each and every. The electric motor is a phenomenal example of how flemings lefthand rule works, electrical energy is converted into mechanical energy by using an electric motor. A coil of wire wound around an axle is placed between the two poles at the magnets. Although there is no industry standard that defines the life of an electric motor, it is generally considered to be 20 years. The working of an electric motor is based on the fact that a current carrying conductor produces a magnetic field around it. An electric generator is a device which converts mechanical energy into electrical energy. Electric motor class 10, magnetic effects of electric. Backed by 150 years of experience, simotics motors are unrivaled when it comes to reliability, ruggedness, compactness, efficiency, and performance. What do all those things on an ac motor nameplate mean. Rotates a number of degrees with each electric pulse. Class 10 physics magnetic effects of electric current. These ncert book chapter wise questions and answers are very helpful for cbse board exam.
Motor a split ring commutator sometimes just called a commutator is a simple and clever device for reversing the current direction through an. When electric current is passed into the rectangular coil, this current produces a magnetic field. Sep 29, 2016 apr 22, 2020 electric motor magnetic effects of electric current, class 10 science class 10 video edurev is made by best teachers of class 10. Electricity and electrical phenomenon have a lot of applications in our day to day life and they also gives a wide variety of wellknown effects, such as lightning, static electricity, electromagnetic induction and the flow of electrical current. Electric circuit analogy 10 the airgap 11 reluctance and airgap flux densities 12. At least one of the two magnetic field is generated by a solenoid carrying a current. To better understand, imagine the following situation.
The hotspot is a point at the center of the motors windings where the temperature is higher. Cbse class 10 science magnetic effects of electric current electric motor works on the principle of flemings left hand rule. Cbse ncert notes class 10 physics magnetic effects of. Electric motor is a device which converts electrical energy into mechanical energy. Magnetic effects of electric current, class 10 chapter science notes are the best study materials. As can be seen from the above table, hotspot over temperature allowance for a, b. Copper conductor 75 c rating 30 c ambient wire size awg no. Mcq questions for class 10 science with answers was prepared based on latest exam pattern.
Ncert solutions for class 10 science magnetic effects of electric current part 2 class 10 science class book solutions are available in pdf format for free download. Keep alert for three sure signs of improper bearing operation. Schneider electric gv2p14 motor protection circuit. Magnetic effects of electric current class 10 notes science. So as an example a 10 hp motor is most efficient when driving a load that requires 7. Ncert solutions for class 10 science chapter 12 electricity. Study the brief notes on magnetic effect of electric current class 10.
An electric motor is a type of prime mover for a mechanical system. Cbse 10, physics, cbse magnetic effects of electric current, mcq. The mechanical energy can be used to perform work such as rotating a pump impeller, fan, blower, driving a compressor, lifting materials etc. As the current flows through coil in anticlockwise direction d c b a, the force is experienced by arms ba and dc. Electric generator class 10 working, principle, diagram. Electric motor principle, working, diagram explained step by step. Electric motor is a device that converts electrical energy to mechanical energy.
Dual element, time delay ul class rk5 fuse used with properly sized ol relay circuit breaker instantaneous trip circuit breaker continuous amp rating single phase units. A motor s efficiency tends to decrease dramatically below about 50% load. Insulation classes for electric motors learning electrical. The trip class means that at 600% 6 times of the maximum thermal current rating or 600% of the actual dial setting on adjustable overloads the class 10 will trip in 10 seconds or less, class 20 will trip in 20 seconds or less, and class 30 will trip in 30 seconds or less. In north america, the national electric manufacturers association nema sets motor standards, including what should go on the nameplate nema standard mg 1 10. Motor a direct current dc motor is a fairly simple electric motor that uses electricity and a magnetic field to produce torque, which turns the motor. It looks likeprinciple of electrical generatorthe electrical generator works on the principle thatwhen a straight conductor is moved in a magnetic field,then current is induced in. Ultimately, motors are the interface between the electrical and mechanical systems of a facility. Understanding motor nameplate information nema vs iec.
The principle of the electric motor is based on the fact that a current carrying conductor produces a magnetic field around it. An electric motor is used to convert electrical energy into mechanical energy. Explain the working of electric motor with a neat diagram. Oct 08, 2018 cbse class 10 science chapter magnetic effects of electric current notes in pdf are available for free download in mycbseguide mobile app. The speed of an ac motor depends on the frequency of the input power and the number of poles for which the motor is wound. Home technical articles 10 different duty types load cycle of a threephase asynchronous motors motor duty load cycle the term duty defines the load cycle to which the machine is subjected, including, if applicable, starting, electric braking, noload and rest deenergized periods, and including their durations and sequence in time. Class 8502 or 8536, type s, nema size 0, 1, 1p, or 2 the class 9991 oversize enclosures listed in table 6 accept an openstyle contactor or starter, along with a fused controlcircuit transformer form f4t, for field assembly of enclosed controllers. Cbse class 10 science chapter magnetic effects of electric current notes in pdf are available for free download in mycbseguide mobile app. Cbse educational study material, solved question answer of all subjects. Plotting the actual motor current on the trip curve is not sufficient, because the olr may trip even if the motor current curve does not intersect the olr trip curve. Thus, a 10horsepower hp motor has an acceptable load range of 5 to 10 hp.
This video is especially for the students of class 10 and class 9. Class 10 chapter class 10 magnetic effects of electric current. Sal shows that this net torque will cause the loop to rotate. The allowable 10% voltage variation is based upon the assumption that horsepower will not exceed nameplate rating and that motor temperature may increase. Electric motors defined as electromechanical devices that convert electrical energy to mechanical energy. A motor works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it. Magnetic effects of electric current, class 10 chapter. Electric motor, magnetic effects of electric current, class 10. Ncert solutions for class 10 maths, science, english, hindi. What is the principle of an electric motor and what is the construction of an electric motor. Introduction physical phenomena associated with the presence and flow of electric charge is known as electricity. Apr 22, 2020 electric motor magnetic effects of electric current, class 10 science class 10 video edurev is made by best teachers of class 10. What does the trip class 10, class 20 and class 30 mean for.
Ncert solutions for class 10 maths, science, english. Troubleshooting instruments like handheld vibration pens, digital thermometers, and electronic stethoscopes help spot bearings in poor operating condition. Electric motor magnetic effects of electric current, class. This reduction of the expected life of the motor repeats itself for every 10c. An electric motor is a machine which converts electrical energy into mechanical energy. This is sometimes referred to as the half life rule. Ncert class 10 science chapter magnetic effects of electric current. Mechanical energy what is an electric motor an electric motor is a device converting electrical energy into mechanical energy usually a torque. Franklin electric submersible motors are a waterlubricated design. Ncert solutions for class 10 science magnetic effects of. Nov 30, 2014 electric motors defined as electromechanical devices that convert electrical energy to mechanical energy. Magnetic effects of electric current for 10th class authorstream. As can be seen from the above table, hotspot over temperature allowance for a, b, f and h are respectively 5 c, 10 c, 10 c and 15 c.
Electric motor parts of motor, working of electric motor. These class 10 ncert solutions are prepared by top educators in the country with a very wide range of experience. Many household and industrial motors are in the fractional horsepower class. The electric motor operation is based on the following points. Free pdf download of cbse class 10 science chapter magnetic effects of electric current multiple choice questions with answers. Maximum efficiency is usually near 75% of rated load. Take two bar magnets and keep the poles facing each other with a small space in between. Simotics industrial electric motors provide you with the optimum solution for every application. Operating at 10c above this, the motors life will be reduced again by 50%. Although the starting current falls off as the motor reaches full speed, the heat produced in the olr and in the motor does not immediately dissipate. The contention does not fully account for the fact that the power reduction from using an energyefficient motor is greater than the extra power required by the load hence, there is a net energy savings and the motor will run cooler, potentially extending insulation life. Classification of electric motors electrical knowhow.
The fill solution consists of a mixture of deionized water and propylene glycol a nontoxic antifreeze. An introduction to electric motors stmicroelectronics. What is electric motor principle working and construction. The best app for cbse students now provides magnetic effects of electric current class 10 notes latest chapter wise notes for quick preparation of cbse board exams and school based annual examinations. May 20, 2015 electric motor hindi magnetic effect of electric current physics khan academy duration. Here students can find in detail explanations for every terminologies provides in this chapter. Each insulation class has a margin allowed to compensate for the motors hot spot. Nov 28, 2017 what is the principle of an electric motor and what is the construction of an electric motor. This conversion is usually obtained through the generation of a magnetic field by means of a current flowing into one or more coils.
The phase relation between the rotor and stator magnetic field i. Development of the induction motor equivalent circuit 258 stationary conditions 258. Ncert solutions for class 10 is a very important study material for students looking to score high marks in their board exams. Abb motors and generators nema explosion proof ac and dc motors 5 nema explosion proof ac and dc motors division 1 capabilities single phase 0. May 25, 2018 ncert solutions for class 10 science magnetic effects of electric current part 2 class 10 science class book solutions are available in pdf format for free download. A current carrying conductor placed perpendicular to magnetic field experiences a force. Electric current is the flow of electric charge a physical property of the matter that experiences a force when placed around an electromagnetic field. A commutator is a device that reverses the direction of flow of current through a circuit. The motor standards can be grouped into two major categories. Reasons to determine motor loading most electric motors are designed to run at 50% to 100% of rated load. Buying an energyefficient electric motor fact sheet pdf. Aug 29, 2019 ncert class 10 science chapter magnetic effects of electric current.
Magnetic effects of electric current class 10 notes pdf are presented in a sequential manner with the proper usage of examples, diagrams and tips to ensure you face no difficulty while studying through our class 10 magnetic effects of electric current notes. This video is highly rated by class 10 students and has been viewed 1921 times. It is based on the principle that when a currentcarrying. A segmented copper sleeve, called a commutator, resides on the axle of a bdc motor. Chapter 12 of ncert class 10 science books is electricity, where you will understand different concepts of circuit diagrams, resistance, electric power, and heating effects of electric current.
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