Question

electric bulb is marked 230 volt hundred watt calculate the current that passes through the filament and its resistance.​

Answer 1

Explanation:

Power P = 100 w

Voltage V = 230 V

Current I = ?

Resistance R = ?

$p \: = v.i$

$i \: = \frac{p}{v}$

$i \: = \frac{100}{230}$

$i \: = 0.43 \: ampere$

$p \: = \frac{ {v}^{2} }{r}$

$r \: = \frac{ {v}^{2} }{p}$

$r \: = \frac{ {(230)}^{2} }{100}$

$r \: = 529 \: ohm$