Question

An electron moves from a 20 V equipotential line to a −30 V equipotential line. The change in potential energy of the system is:

A. −50eV
B. 10eV
C. 30eV
D. −10eV
E. 20eV F. 50eV
G. −30eV
H.−20eV

Answer 1

The change in potential energy of the system can be calculated using the formula ΔPE = qΔV, where ΔPE is the change in potential energy, q is the charge of the electron, and ΔV is the change in potential difference. In this case, the change in potential energy of the system is -50eV.

Step-by-step explanation:

The change in potential energy of the system can be calculated using the formula:

ΔPE = qΔV

where ΔPE is the change in potential energy, q is the charge of the electron, and ΔV is the change in potential difference.

In this case, the charge of the electron is e = -1.60 × 10-19 C and the change in potential difference is ΔV = -30 V - 20 V = -50 V.

Substituting these values into the formula, we get:

ΔPE = (-1.60 × 10-19 C)(-50 V) = 8.00 × 10-18 J = 8.00 × 10-18 eV

Therefore, the change in potential energy of the system is 8.00 × 10-18 eV, which is equivalent to -50eV (option A).