Question

A bulb is rated 220 V, 0.5 A. find its resistance and power.​

Answer 1

Explanation:

• V = 220v
• I = 0.5 A
• R= ?
• P = ?

R = v/I

R = 220/0.5

R = 440 ohm

P=VI

P= 220*0.5

P = 110 watt

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Answer 2

$\large\rm\underline\red{Given \: :-}$

• Voltage = 220V
• Current = 0.5 A

$\large\rm\underline\red{To \: find \: :-}$

• Power
• resistance

$\large\rm\underline\red{Solution \: :-}$

Required formula :-

$\red\bigstar \: {\underline{\pink{\boxed{\mathcal{\red{Power = Voltage × Current }}}}}}$

$\red \bigstar \: {\underline{\pink{\boxed{\mathcal{\red{Resistance = \frac{Voltage}{Current} }}}}}}$

Finding Power

$\sf\implies{Power = 220 × 0.5 } \\ \\ \bf\implies \red{Power = 110w } \: \: \: \: \: \:$

Finding resistance

$\sf\implies{Resistance = \cancel{\frac{220}{0.5} }} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \bf\implies \red{Resistance =440ohm }$

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