A 50μf capacitor in a defibrillator is charged to 3000V. The energy stored in the capacitor is sent through the victim during a pulse of duration 2 ms; the power of the pulse is close to:

Question

Question

This question was previously asked in

AAI ATC Junior Executive 2015 Official Paper (Shift 2)

Answer 1

Concept:

Energy stored in condenser:

A capacitor is a device which stores energy in the form of charge.

The process of charging up a capacitor involves the transferring of electric charges from one plate to another.

The energy stored in the capacitor is;

----(1)
Where,

Q = charge stored on the capacitor

U = energy stored in the capacitor

C = capacitance of the capacitor

V = Electric potential difference

Energy: The ability to do work is defined as Energy.

Power: It is defined as the ratio of work done to that of the time taken

Power = work / time

So, Energy = Power × Time ----(2)

Calculation:

Given:

C = 50μf, V = 3000V, t = 2 ms

From equation (1);

U = 225 J

From equation (2);

Power = 112.5 KilloWatt