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

Asked by Last Modified  

3 Answers

Learn Class IX-X Tuition

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

What is alkane?
Well alkane is saturated hydrocarbon in which the carbon atoms are bonded with single bond
Ravi Ranjan
0 0
8
How sound pitch is measure?
DECIBALS (db)
Chandramami
Why sky appears dark instead of blue to an astronaut in space?
The sky appears blue when viewed from Earth because of scattering of light particles I.e blue light gets refracted wherever there is atmosphere. As there is no atmosphere in space, astronauts see the actual colour of sky I.e black.
Meghana
Define energy?
The strength and vitality required for sustained physical or mental activity.
Pradeep
What do you mean by Disguised unemployment?
Hidden unemployment or disguised unemployment is a kind of unemployment where some people seem to be employed but are not. This usually occurs when there is over-employment in a particular sector. This...
Suresh

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

Ask a Question

Related Lessons

Motion
Lets start with very intresting chapter of class 9 MOTION when there is movement of body ,or object change its position the object is said to be in the motion , note -distance and time are important...

Sandeep Kumar

0 0
0
Brief decritpion of Bryophyte
Bryophytes are small, non-vascular plants, such as mosses, liverworts and hornworts. They play a vital role in regulating ecosystems because they provide an important buffer system for other plants, which...

Nagaraj Pushparaj

0 0
0
How to you Squaring a number ending in 6
Ex 66^2 =_________.a) Write down 6.b) 2 x (6 + 1) + 1 = 15. Write 5, carry *1.c) 6 x (6 + 1) = 42 + *1 = 43. Write 43.d) The answer is 4356. Ex 86^2 =_________.a) Write down 6.b) 2 x (8 + 1) + 1 =...

Debraj Paul

0 0
0
Scale and its importance ICSE GEOG.TOPOSHEETS
Scale.The types and uses RF 1:50000 Map Distance /Ground distance. Use Universal acceptance as can be converted andinterpreted in specific units like british measurement in d form of inches and miles Verbal/Scale...

Savita

0 0
0
Angle Of Elevation And Depression
Angles of Elevation and Depression: You can use right triangles to findout distances, if you know an angle of elevation or an angle of depression of a object. The figure below shows each of these kinds...

Shuvham Singhal

1 0
0

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 Mumbai
Grade 10 Tuition in Chennai
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