What is the resistance of a torch bulb rated at $2.5 V$ and $500 m A$ ?

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Solution

According to Ohm's law .
$R = \frac{V}{I}$
Given , $V$ = $2.5$ V
$I$ = $500$ mA = $0.5$ A
Therefore , $R$ = $\frac{V}{I}$
= $\frac{2.5}{0.5}$
= $5$ $Ω$

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What is the resistance of a torch bulb rated at 2.5V and 500mA?

According to Ohm's law .R=VIGiven , V = 2.5 VI = 500 mA = 0.5 ATherefore , R = VI = 2.50.5 = 5 Ω

What is the resistance of a torch bulb rated at $2.5 V$ and $500 m A$ ?

According to Ohm's law .
$R = \frac{V}{I}$
Given , $V$ = $2.5$ V
$I$ = $500$ mA = $0.5$ A
Therefore , $R$ = $\frac{V}{I}$
= $\frac{2.5}{0.5}$
= $5$ $Ω$