The emf of a cell is always greater than its terminal voltage. Why? Give reason.

Asked by Last Modified  

3 Answers

Follow 0
Answer

Please enter your answer

Mehboob Husain Khan

Tutor

The terminal voltage is measured in closed circuit (while current is drawn) and in this stage internal resistance of cell becomes active which lowers the potential difference across the terminals, The emf is measured when circuit is open (current is not drawn) and hence internal resistance remains inactive....
read more
The terminal voltage is measured in closed circuit (while current is drawn) and in this stage internal resistance of cell becomes active which lowers the potential difference across the terminals, The emf is measured when circuit is open (current is not drawn) and hence internal resistance remains inactive. This is the reason why emf is more than the terminal voltage. read less
Comments
Dislike Bookmark

Quality teaching with intense care

Terminal voltage, V=E-Ir . Where E=emf and I=current, r=internal resistance of the cell. Whenever current flows through cell, some voltage drop occurs across the internal resistance of the cell. This voltage drop is proportional to the current flowing through the cell. Hence, the terminal voltage is...
read more
Terminal voltage, V=E-Ir . Where E=emf and I=current, r=internal resistance of the cell. Whenever current flows through cell, some voltage drop occurs across the internal resistance of the cell. This voltage drop is proportional to the current flowing through the cell. Hence, the terminal voltage is always less than the emf of the cell. Same thing happens in A.C. and D.C. generators also. This is broadly related to the voltage regulation of any voltage source. read less
Comments
Dislike Bookmark

Terminal voltage is the potential difference at the terminals of the circuit. Even if there is no load, still the terminal voltage will be less than the emf due to drop across the internal resistance of the supply. We write this as, E = V+Ir Where, E is the emf, V is the terminal voltage and...
read more
Terminal voltage is the potential difference at the terminals of the circuit. Even if there is no load, still the terminal voltage will be less than the emf due to drop across the internal resistance of the supply. We write this as, E = V+Ir Where, E is the emf, V is the terminal voltage and r is the internal resistance. read less
Comments
Dislike Bookmark

View 1 more Answers

Related Questions

Is there any rules and regulations for both customers and shopkeepers?
Yes both have certain rules and regulations.
Shishir
What is the object which have one curved surface and one vertex and one circular face?
Cone.
Satish
0 0
8
What Makes coconut oil freeze in winter ?
Freezing point is around 10-15 degrees
Guru
0 0
5
What is pascal law?
Pascal's law or the principle of transmission of fluid-pressure is a principle in fluid mechanics that states that pressure exerted anywhere in a confined incompressible fluid is transmitted equally in...
Ravi Ranjan
0 0
7
Sin45+Cot45?
sin45=1/root(2) cot45=1 so sin45+cot45 = (1/root(2))+1
Rajkmar

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

Ask a Question

Related Lessons

Biology - DNA(Deoxyribonuclic Acid)
How the strands of thread forms a cloth and creates the cloth’s color, shape and designs same way a DNA is responsible for the development and functioning of living organisms. An organism is made...

Nithya S.

0 0
0
Resistors and Resistance
Hello,In this lesson I will discuss a little about resistance and resistors. First, let's be clear on the main difference between the two, then I will explain the details a bit. Resistance is a property,...

Akshita M.

0 0
0
Short - Cut For Squaring Two-Digit Numbers [May Also Be Extended To Three-Digit And Four-Digit Numbers As Well]
Square of a two-digit number: Quick Method: (82)2= 6404 32 ==> 8 and 2 from original number itself and another 2 from the power of 82 i.e. 2 6724 Likewise for square of...
I

Intellect Growth Management

0 0
0
Graphite - Structure and Properties
About:Graphite is an allotrope of carbon, which is black or bluish grey with a metallic lustre and or greasy feel. It occurs in igneous and metamorphic rocks, such as marble. Structure:Each carbon is...

Debraj Paul

0 0
0
Internet of Things, Social Media Becoming Part of E-Discovery Landscape
The days when e-discovery consisted of handing over copies of e-mails to address Freedom of Information Act (FOIA) requests, compliance regulations or other legal obligations are over. Now, it's just as...

Rajesh N V

3 0
1

Recommended Articles

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 Mohammad Wazid, a skilled trainer for...

Mohammad Wazid is a certified professional tutor for class 11 students. He has 6 years of teaching experience which he couples with an energetic attitude and a vision of making any subject easy for the students. Over the years he has developed skills with a capability of understanding the requirements of the students. This...

Read full article >

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 >

Quest Academy - Institute of the month

Quest Academy is a professional Bangalore based NEET and JEE (Main + Advanced) training institute. The academy was incorporated in 2015 to cater to the needs of students, who aim to crack competitive exams by connecting with the best brains around. The institute helps students enhance their skills and capabilities through...

Read full article >

Find Grade 10 Tuition near you
Grade 10 Tuition in Delhi
Grade 10 Tuition in Bangalore
Grade 10 Tuition in Hyderabad
Grade 10 Tuition in Kolkata
Grade 10 Tuition in Chennai
Grade 10 Tuition in Mumbai
Grade 10 Tuition in Pune
Grade 10 Tuition in Noida
Grade 10 Tuition in Lucknow
Grade 10 Tuition in Gurgaon
Online Tuition Class 10

Looking for Class 10 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you