Electric Current
Electric Current
An ordered motion of charged particles in a definite direction is termed as electric current Its magnitude is determined by the amount of net charge flowing through a cross section, perpendicular to the direction of the flow in unit time. Electric Current can be calculated by using the relation:
,
Where I = current flowing
q= charge
t= time
The SI. unit of electric current is ampere (A) named in the honour of a French Andre Marie Ampere. Electric Current is a scalar quantity.
We consider Ampere is a fundamental unit and Coulomb is derived from ampere, because electric current was discovered first and the phenomenon that Electric current is because of flow of electrons was discovered later.
When 1 coulomb of charge flows through any cross section of a conductor in 1 second then the electric current flowing through it is said to be 1 ampere.
The smaller unit of current is milli ampere (1 mA = 10-3 A) and micro ampere (1A = 10-6A)
Illustration: A current of 150 mA flows through a circuit for 2min. Find the amount of charge that flows through the circuit.
Solution: Given, Current,
Time,
Amount of charge, q = ?
We know that,
So, 18 C of charge flows around the circuit.
Illustration: If we observe that 20 C of net charge flows across a cross section of a current carrying wire in 4 seconds. Find the value of current?
Solution: Net Charge (q) = 20C and time(t) = 4sec
Direction of Current
In a circuit the direction of flow of current is taken from positive terminal to negative terminal. This is the conventional direction of current. The actual; direction of current is from negative terminal to the positive terminal. As we know the electrons are the charge carrier and they are negatively charged so they will be attracted towards the positive terminal hence the actual direction of flow will be from -ve terminal to positive terminal.
Instrument which is used to measure electric current is called | |||
| Right Option : A | |||
| View Explanation | |||
20 coulomb charge is flowing in 0.5 second from a point in an electric circuit then the value of electric current in ammeter will be | |||
| Right Option : B | |||
| View Explanation | |||
Find the amount of Electric Charge flowing through the circuit if an electric current of 5 A is drawn by an electric appliance for 5 minute. | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [20]
My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas is an institute of high repute. Yogansh has taken admission last year. It creates abilities in child to prepare for competitive exams. Students are motivated by living prizes on basis of performance in Abhyas exams. He is satisfied with institute.
Yogansh Nyasi
7thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
8thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
Barkha Arora
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
Upmanyu Sharma
7thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thUsually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Anika Saxena
8thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
