why current is scalar quantity but current-density a vector ?

Asked by Last Modified  

9 Answers

Learn Class XI-XII Tuition (PUC)

Follow 0
Answer

Please enter your answer

Mohammad Zeeshan

13 years experience of teaching Physics & Mathematics.

Current is not a scalar quantity....its a tensor quantity as its direction is fixed. Current density is current per unit area and as area is a vector quantity so is the current density.
Comments
Dislike Bookmark

Home tutor

Firstly you should know difference between scalar and vector quantity....your doubt would be clear then....
Comments
Dislike Bookmark

Current is the dot product of current density vector and area vector..like work is dot product of force and dispacement vector ....
Comments
Dislike Bookmark

Physics Coaching & M S Excel Training

We need to understand the concept of scalar and vector in the right sense to get this cleared. For a scalar, the magnitude doesn't change with direction whereas for a vector, the magnitude changes with direction, and that is the reason we need to specify the direction along with magnitude for a vecto...
Comments
Dislike Bookmark

PHYSICS MENTOR

It does not follow the law of vector addition
Comments
Dislike Bookmark

Home tutor professional to serve you best.

because it does not obey the triangle law of vector addition.
Comments
Dislike Bookmark

Fun with science

Though current has magnitude as well specific direction,then also it is a scalar quantity because current can be added using simple algebra.For any quantity to be a vector quantity ,it must fulfill the condition of vector addition or subtraction through certain laws of vector addition like triangle laws,polygon...
read more
Though current has magnitude as well specific direction,then also it is a scalar quantity because current can be added using simple algebra.For any quantity to be a vector quantity ,it must fulfill the condition of vector addition or subtraction through certain laws of vector addition like triangle laws,polygon laws and parallelogram law of vector addition.Current does not obey these laws while current density fulfill these conditions. read less
Comments
Dislike Bookmark
If I have I1=100*sin(wt) and I2=200*sin(wt-30). It can be added by vector addition. please clarify.
Comments
Dislike Bookmark

Trainer

when you add current it doesn't follow laws of vector addition,so it is a scalar but current density is the cuurent flowing normally through the area, so direction is applicable,hence a vector
Comments
Dislike Bookmark

View 7 more Answers

Related Questions

What is the life span of an elephant?
Asian Elephant = 48 years African bush Elephant = 60-70 years. African Forest Elephant = 60-70 years.
Navneet
0 0
5
What is correlation?
Statistical measurement relationship in between two are more variables.... The value of Correlation coefficient r will be lies in between - 1 to +1
Jayesh
How to teach online student?
Hi Shailendra. Its nice having you on this forum. As you know there is a small learning curve for teaching online. You need some hardware : laptop/pc with broadband connection, digital writing pad, camera...
Shailendra
1 1
7
. To increase the accuracy of a potentiometer __________ should be used. (A uniform wire of a large length should be used, A uniform wire of a small length, Non-uniform wire)
A uniform wire of a large length should be used
Narendra Kumar
0 0
6
Colour in soap bubbles is due to __________. (Polarization of light, interference of light, reflection of light)
interference of light.
Kumar Upendra Akshay

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Chemistry Nuclear Radiations Detection
How are nuclear radiations detected and measured? Discuss one method.The equipment utilised for the detection and measurement of radiation commonly employs some type of substance or material that responds...

Nidhi T.

0 0
0
Differentiating 2(x^2) using first principle
Differentiate 2x² using first principle We know from first principle that dy/dx f(x) = lim δx→0 /δx Here f(x) = 2 x² substituting 2x² in place of x in the equation above lim...

B.Sudhakar

3 0
0
Why GST May Boost Gold Smuggling, Illegal Jewellery Sales?
Mumbai: A hike in taxes on gold under GST (Goods and Services Tax) could stoke under-the-counter buying and drive up appetite for precious metal smuggled into the country, where millions of people store...

FR Prashanth Reddy

Introduction To Accounting: Part 13: Money Measurement Concept
According to the Money Measurement Concept, only those transactions and events are recorded in the books of accounts which can be measured in terms of money. Therefore, a transaction which cannot...

Nishant Kumar

0 0
0
Partnership Basic Questions
CHAPTER:2 Accounting for partnership firms: Basic concept State the conditions under which capital balances may change under the system of a Fixed Capital Account. A is partner in a firm. His capital...

Mahesh Kumar

1 0
0

Recommended Articles

Meet Raghunandan.G.H, a B. Tech Tutor from...

Raghunandan is a passionate teacher with a decade of teaching experience. Being a skilled trainer with extensive knowledge, he provides high-quality BTech, Class 10 and Class 12 tuition classes. His methods of teaching with real-time examples makes difficult topics simple to understand. He explains every concept in-detail...

Read full article >

Meet Swati, a Hindi Tutor from Bangalore

Swati is a renowned Hindi tutor with 7 years of experience in teaching. She conducts classes for various students ranging from class 6- class 12 and also BA students. Having pursued her education at Madras University where she did her Masters in Hindi, Swati knows her way around students. She believes that each student...

Read full article >

Meet Urmila, an MBBS tutor from Bangalore

Urmila is a passionate teacher with over 8 years of experience in teaching. She is currently pursuing her Ph. D. She provides classes for Class 11, Class 12, MBBS and Medical tuition.  Urmila began her career in teaching long before she became a teacher. She used to provide classes for foreign national students in her college...

Read full article >

Meet Sandhya R, a B.Sc tutor from Bangalore

Sandhya is a proactive educationalist. She conducts classes for CBSE, PUC, ICSE, I.B. and IGCSE. Having a 6-year experience in teaching, she connects with her students and provides tutoring as per their understanding. She mentors her students personally and strives them to achieve their goals with ease. Being an enthusiastic...

Read full article >

Find Class 12 Tuition near you
Class 12 Tuition in Delhi
Class 12 Tuition in Bangalore
Class 12 Tuition in Chennai
Class 12 Tuition in Hyderabad
Class 12 Tuition in Kolkata
Class 12 Tuition in Mumbai
Class 12 Tuition in Pune
Class 12 Tuition in Lucknow
Class 12 Tuition in Noida
Class 12 Tuition in Gurgaon
Online Tuition Class 12

Looking for Class 12 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you