The number of electrons presents in 1 coulomb of charge is:

Free Practice With Testbook Mock Tests

Options:

1. 825 × 1016

2. 625 × 1016

3. 625 × 10-16

4. 6.25 × 1016

Correct Answer: Option 2 (Solution Below)

This question was previously asked in

SSC JE EE Previous Paper 10 (Held on: 10 Dec 2020)

SSC JE EE Previous Paper (Held on: 10 Dec 2020)

Solution:

Concept:

Electric Current (I):

• It is defined as the net amount of electric charge that flows through a cross-section of a conductor in an electric circuit in a per unit time.
• S.I unit of electric current is Ampere(A).

1 Coulomb (C):

• One Coulomb of charge is equal to the charge transported by an electric current of constant magnitude in one second of time.
• It is defined as the product of a 6.24 × 1018 ​charge of an electron.
• It is the S.I unit of electric charge.

Charge of one electron = 1.6 × 10-19 Coulomb.

Explanation:

We know that e = 1.6 × 10-19 C, i.e charge on the electron.

The total charge required is 1 Coulomb, q = 1C

Therefore we also know that q = n × e, (n = number of electrons on the charge)

Hence, n = q/e....(1)

Substituting all the values in the equation (1)

n = 1/1.6 × 10-19 ​= 625 × 1016

So, if 1A current flows through the conductor then 625 × 1016 electrons flow per second across the cross-section of the conductor.
The passage contains a mathematical question about the number of electrons in 1 coulomb of charge, along with a detailed solution and the correct answer.
single_question_with_answer
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
The number of electrons presents in 1 coulomb of charge is:

Free Practice With Testbook Mock Tests

Options:

1. 825 × 1016

2. 625 × 1016

3. 625 × 10-16

4. 6.25 × 1016

Correct Answer: Option 2 (Solution Below)

This question was previously asked in

SSC JE EE Previous Paper 10 (Held on: 10 Dec 2020)

SSC JE EE Previous Paper (Held on: 10 Dec 2020)

Solution:

Concept:

Electric Current (I):

• It is defined as the net amount of electric charge that flows through a cross-section of a conductor in an electric circuit in a per unit time.
• S.I unit of electric current is Ampere(A).

1 Coulomb (C):

• One Coulomb of charge is equal to the charge transported by an electric current of constant magnitude in one second of time.
• It is defined as the product of a 6.24 × 1018 ​charge of an electron.
• It is the S.I unit of electric charge.

Charge of one electron = 1.6 × 10-19 Coulomb.

Explanation:

We know that e = 1.6 × 10-19 C, i.e charge on the electron.

The total charge required is 1 Coulomb, q = 1C

Therefore we also know that q = n × e, (n = number of electrons on the charge)

Hence, n = q/e....(1)

Substituting all the values in the equation (1)

n = 1/1.6 × 10-19 ​= 625 × 1016

So, if 1A current flows through the conductor then 625 × 1016 electrons flow per second across the cross-section of the conductor.
user
The passage contains a mathematical question about the number of electrons in 1 coulomb of charge, along with a detailed solution and the correct answer.

TYPE: SINGLE_QUESTION_WITH_ANSWER