A `40muF` capacitor in a medical instrument is charged to 300 V. the energy stored in the capacitor is sent through patient's brain during a pulse of duration 2 millisecond. What is the power delivered to the brain of the putient ?

Options

A. 500 W
B. 600 W
C. 750 W
D. 900 W

Answer

D

Explanation

Energy stored in the capacitor
`=(1)/(2)CV^(2)=(1)/(2)xx40xx10^(-6)xx(3xx10^(2))^(2)=1.8J`
`therefore`Power`=(W)/(t)=(E)/(t)`
`=(1.8)/(2xx10^(-3))=(1800)/(2)=900W`