Class 12 Exam > Class 12 Questions > electromotive force isa)The work done by the ...
Start Learning for Free
electromotive force is
- a)The work done by the source in taking the charge from lower to higher potential energy
- b)The work done per unit charge by the source in taking the charge from higher to lower potential energy
- c)The number of charges pumped by the source from lower to higher potential energy
- d)The work done per unit charge by the source in taking the charge from lower to higher potential energy
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
electromotive force isa)The work done by the source in taking the char...
Explanation:An electric field exists in the electrolyte between the positive and negative terminals of the battery. In the external circuit, the current flows from the positive electrode to the negative electrode. To maintain continuity, in the electrolyte, the current (positive charges) flow from the negative electrode (lower potential) to the positive electrode (higher potential). Work done by the source in taking unit positive charge from lower to higher potential is called electromotive force.
Most Upvoted Answer
electromotive force isa)The work done by the source in taking the char...
As you know in a circuit a current flows from higher potential to lower potential.
But the case is different inside a battery.
As the current flows from higher potential to lower potential outside the battery in a circuit the you will observe that when it reaches the negative terminal it has to go from - ve to + ve terminals inside the battery.
The force which drives the charge particle from negative to positive terminal inside the battery is called Electromotive force.
It is also defined as the difference in potential that tends to give rise to an electric current.
But the case is different inside a battery.
As the current flows from higher potential to lower potential outside the battery in a circuit the you will observe that when it reaches the negative terminal it has to go from - ve to + ve terminals inside the battery.
The force which drives the charge particle from negative to positive terminal inside the battery is called Electromotive force.
It is also defined as the difference in potential that tends to give rise to an electric current.
Free Test
FREE
| Start Free Test |
Community Answer
electromotive force isa)The work done by the source in taking the char...
The correct answer is option D: The work done per unit charge by the source in taking the charge from lower to higher potential energy.
To understand why option D is the correct answer, let's first define what electromotive force (EMF) is. EMF is the energy per unit charge supplied by a source, such as a battery or generator, to maintain a steady flow of charge in a circuit. It is measured in volts (V).
Now, let's break down each option and analyze why the other options are incorrect:
a) The work done by the source in taking the charge from lower to higher potential energy:
This option refers to the concept of potential energy and work. When a charge moves from a lower potential energy to a higher potential energy, work is done on the charge by an external force. However, this is not the definition of EMF. EMF is not concerned with the potential energy of the charge, but rather with the work done per unit charge.
b) The work done per unit charge by the source in taking the charge from higher to lower potential energy:
This option is similar to option a, but in the opposite direction. It suggests that the source does work on the charge when it moves from a higher to lower potential energy. However, this is not the definition of EMF either. EMF is specifically defined as the work done per unit charge when the charge moves from a lower to higher potential energy.
c) The number of charges pumped by the source from lower to higher potential energy:
This option refers to the number of charges moved from a lower to higher potential energy. While the number of charges is related to the flow of charge in a circuit, it is not the definition of EMF. EMF is concerned with the energy supplied per unit charge, not the quantity of charges.
d) The work done per unit charge by the source in taking the charge from lower to higher potential energy:
This option correctly defines EMF. It states that EMF is the work done per unit charge by the source as the charge moves from a lower to higher potential energy. In other words, it represents the energy supplied by the source to overcome the potential difference and maintain the flow of charge in the circuit.
In conclusion, the correct answer is option D: The work done per unit charge by the source in taking the charge from lower to higher potential energy.
To understand why option D is the correct answer, let's first define what electromotive force (EMF) is. EMF is the energy per unit charge supplied by a source, such as a battery or generator, to maintain a steady flow of charge in a circuit. It is measured in volts (V).
Now, let's break down each option and analyze why the other options are incorrect:
a) The work done by the source in taking the charge from lower to higher potential energy:
This option refers to the concept of potential energy and work. When a charge moves from a lower potential energy to a higher potential energy, work is done on the charge by an external force. However, this is not the definition of EMF. EMF is not concerned with the potential energy of the charge, but rather with the work done per unit charge.
b) The work done per unit charge by the source in taking the charge from higher to lower potential energy:
This option is similar to option a, but in the opposite direction. It suggests that the source does work on the charge when it moves from a higher to lower potential energy. However, this is not the definition of EMF either. EMF is specifically defined as the work done per unit charge when the charge moves from a lower to higher potential energy.
c) The number of charges pumped by the source from lower to higher potential energy:
This option refers to the number of charges moved from a lower to higher potential energy. While the number of charges is related to the flow of charge in a circuit, it is not the definition of EMF. EMF is concerned with the energy supplied per unit charge, not the quantity of charges.
d) The work done per unit charge by the source in taking the charge from lower to higher potential energy:
This option correctly defines EMF. It states that EMF is the work done per unit charge by the source as the charge moves from a lower to higher potential energy. In other words, it represents the energy supplied by the source to overcome the potential difference and maintain the flow of charge in the circuit.
In conclusion, the correct answer is option D: The work done per unit charge by the source in taking the charge from lower to higher potential energy.
|
Explore Courses for Class 12 exam
|
|
Similar Class 12 Doubts
electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer?
Question Description
electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer?.
electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer?.
Solutions for electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice electromotive force isa)The work done by the source in taking the charge from lower to higher potential energyb)The work done per unit charge by the source in taking the charge from higher to lower potential energyc)The number of charges pumped by the source from lower to higher potential energyd)The work done per unit charge by the source in taking the charge from lower to higher potential energyCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup