# Electronics - Resistance and Power - Discussion

Discussion Forum : Resistance and Power - General Questions (Q.No. 13)
13.
How much energy is stored if 6.24 x 1018 electrons are stored in 4 volts?
4 joules
1.56 x 1018 electrons
1.56 coulombs
2.496 x 1019 electrons
Explanation:
No answer description is available. Let's discuss.
Discussion:
7 comments Page 1 of 1.

Anomi said:   5 years ago
V = Joules/Coulomb.

thus, Joules = Volts * Coulomb.

Convert 6.24x10^18 electrons to coulomb.
1 electron = 1.60x10^-19 coulomb.
1 coulomb = 6.24x10^18 electrons.

Joules = 4(1) = 4J.

Vishalakshi said:   6 years ago
Your explanation is clear and correct @Saichaitanya.

Rakesh said:   6 years ago
Please explain in detail. How can I solve?

Mamatha said:   7 years ago
Is it right what does Sai Chaithanya said?

Q = NE

Energy Q equal to NE, whre N no of electron and E voltage.

STANDARD VALUE of 1 eV = 1.6021 x 10^-19 Joule

In the Question

4 eV = 4*(1.6021 x 10^-19)*(6.24 x 10^18) Joules
= 40*(10^-1)Joules
= 4 Joules