Question

for flash pictures a photographer uses a 30 microfarad capacitor and a charger that supplies 3*10^3 V . calculate the charge and the energy spent for each flash?

Answer 1

Answer:

Explanation:

Using q=CV

q=30*10^-6 * 3*10^3

q=90*10^-3

q=9*10^-2 C

Energy=1/2CV^2

=1/2*30*10^-6 * 9*10^6

=15*9

=135J.

Answer 2

Given:

Capacitor, $C=30 microfarad=30*10^{-6}$

Charger supply voltage, $V=3*10^{3}V$

To Find:

We have to find the charge and the energy spent for each flash

Solution:

The charge for flash is given by, $q=CV$

By Considering the given data,

$q=30*10^{-6}*3*10^{3}$

$q=90*10^{-3}=9*10^{-2} C$

Energy spent for flash is given by, $E=\frac{1}{2}CV^{2}$

By considering the given data,

$E=\frac{1}{2}*30*10^{-6}*9*10^{6}$

$E=15*9=135J$

Hence the charge and the energy of each flash is $9*10^{-2}C$ and $135 J$.

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