Physics, asked by bikas4107, 1 year ago

An electric bulb is rated at 200w-100w what is the resistance of 5 such bulbs burn for 4 hours. What is the electrical energy consumed. Calculate the cost if the rate is 50 paise per unit

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Answered by arunasreecom
3

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Answered by BrainlyBAKA
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\huge\fbox\orange{\underline{Question:–}}\\\\

An electric bulb is rated at 200w-100w what is the resistance of 5 such bulbs burn for 4 hours. What is the electrical energy consumed. Calculate the cost if the rate is 50 paise per unit.

\huge\fbox\orange{\underline{Answer:–}}\\\\

Using, P = \large{V²}{R}

we get R = \large{V²}{P}

= \large{(200)²}{100}

= 400

Energy consumed = P x t

= 100 x 4

= 400 Wh

= 0.4 kWh

Cost at the rate of 50 paise per unit

= Rs (0.50 x 0.4)

= Rs 2

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