A 20-μF capacitor has a charge of 60 μC. How much energy is stored in this capacitor? A) 100 μJ B) 80 μJ C) 90 μJ D) 70 μJ E) 110 μJ

Question

Physics

Kareem Hester

28 March, 05:56

A 20-μF capacitor has a charge of 60 μC. How much energy is stored in this capacitor? A) 100 μJ B) 80 μJ C) 90 μJ D) 70 μJ E) 110 μJ

+5

Answers (1)

Know the Answer?

Matias Mendez · Answer 1

C ... 90

Explanation:

Energy stored = 1/2 of (Charge * Voltage)

... then substitute Voltage with (Charge : Capacitance)

Then obtain the formula for energy stored as ...

E = 1/2 of (Charge) ^2 : Capacitance

= 0.5 x (60^2:20)

; Energy stored = 90