Question

How much current will a torch bulb draw from 3.0 V battery, if the resistance of the bulb filament is 1.2Ω​

Answer 1

Given :

• Potential difference, V = 3.0 V
• Resistance, R = 1.2Ω

To Find :

• Current, I = ?

Solution :

As, we have :

• Potential difference, V = 3.0 V
• Resistance, R = 1.2Ω

So, to find current, we know that :

$\bull \: \: \: \: \: \underline{ \boxed{ \bf \pink{I = \dfrac{V}{R}}}} \: \: \pink{ \dag}$

By substituting values :

$\sf : \implies I = \dfrac{3.0}{1.2}\:\:\: \\ \sf : \implies R = \dfrac{3.0}{0.75} \\ \sf : \implies R = 2.5 \:A$

$\underline{ \tt Hence, \: Current= \pink{2.5A}}$

Answer 2

Answer:

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