# The capacitor was connected to a 100V source. Introduce the dielectric E = 4 into the capacitor.

The capacitor was connected to a 100V source. Introduce the dielectric E = 4 into the capacitor. How will the charge change?

U = 100 V.
ε = 4.
Q2 / Q1 -?
The electric capacity of a flat capacitor C is determined by the formula: C = Q / U and C = ε0 * ε * S / d.
Where Q is the charge on the capacitor plates, U is the voltage across the capacitor, ε0 is the electrical constant, ε is the dielectric constant between the capacitor plates, S is the area of the capacitor plates, d is the distance between the plates.
Q = C * U = ε0 * ε * S * U / d.
Q1 = ε0 * S * U / d.
Q2 = ε0 * ε * S * U / d = 4 * ε0 * S * U / d = 4 * Q1.
Q2 / Q1 = 4.
Answer: the capacitor charge will increase by 4 times. One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.