Question

a bulb of 60w is connected to electric means of 240 volt . Calculate .1 current flowing through the bulb . 2 resistance of bulb​

Answer 1

Given :

• Power of bulb, (P) = 60W
• Voltage of bulb, (V) = 240V

To find,

• Current flowing through the bulb and resistance of bulb

Solution :

Calculate the value of current passing through bulb

• As we know that

★ P = VI ★

Where,

• P = Power
• V = Potential difference
• I = Current

→ 60 = 240 × I

→ I = 60/240

→ I = 1/4 = 0.25A (S.I unit of current is Ampere)

•°• The value current flowing through bulb is 0.25A

Calculate the value of resistance of bulb

• According to the statement of Ohm's law

This law states that the current flowing through a conductor is directly proportional to the potential difference across points of conductor provided the temperature and other condition remains the same.

→ V = IR

→ 240 = 0.25 × R

→ R = 240/0.25

→ R = 960 ohm

•°• The resistance of bulb is 960 ohm.

Answer 2

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a bulb of 60w is connected to electric means of 240 volt . Calculate .1 current flowing through the bulb . 2 resistance of bulb

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$l = \frac{p}{v} \\ \\ l = \frac{60}{240} \\ \\ l = 0.25 \: ampere$

$r = \frac{v}{l} \\ \\ r = \frac{240}{0.25} \\ \\ r = \frac{240}{25} \times \frac{100}{1} \\ \\ \frac{2400}{25}$

R = 960 ohm Ω

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