Question

Please answer this question.​

Answer 1

$\displaystyle\large\underline{\sf\red{Given}}$

✭ Current in the circuit 180 mA

✭ Voltage accross the circuit is 0.9 V

$\displaystyle\large\underline{\sf\blue{To \ Find}}$

◈ The Resistance?

$\displaystyle\large\underline{\sf\gray{Solution}}$

So here we shall use the Ohm's law to find the resistance of the circuit, that is,

$\displaystyle\sf \underline{\boxed{\sf V = IR }}$

• V = Potential difference
• I = Current
• R = Resistance

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$\underline{\bigstar\:\textsf{According to the given Question :}}$

So before substituting the given values let's convet the current from 180 mA to A

➝ $\displaystyle\sf 1 \ mA = 1000 \ A$

➝ $\displaystyle\sf 180 \ mA = \dfrac{180}{1000}$

➝ $\displaystyle\sf 180 \ mA = \dfrac{18}{100}$

➝ $\displaystyle\sf \orange{Current = 0.18 \ A}$

So now we shall use the Ohm's law,

➳ $\displaystyle\sf V = IR$

➳ $\displaystyle\sf \dfrac{V}{I} = R$

➳ $\displaystyle\sf \dfrac{0.9}{0.18} = R$

➳ $\displaystyle\sf \pink{Resistance = 5 \ \Omega}$

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$\displaystyle\sf \bigstar \:\textsf{Know More}$

⪼ $\displaystyle\sf P = VI$

⪼ $\displaystyle\sf P = I^2R$

⪼ $\displaystyle\sf P = \dfrac{V^2}{R}$

⪼ Current is the amount of electricity in the circuit and is measured with the help of an instrument called Ammeter

⪼ $\displaystyle\sf I = \dfrac{Q}{t}$

⪼ SI unit of current is Ampere

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