Question

an electric bulb is rated at 200V ,100W .what is the resistance?if 5 such bulbs burn for 4 hours .what is the electrical energy consumed per day?calculate the cost if ,the rate per day at Rs4.00per unit

Answer 1

Resistance of each bulb is 4 ohm.
The total electrical energy consumed is 1800000 joules.
The cost is Rs2 per day.

Answer 2

$\huge\fbox\orange{\underline{Question:–}}$

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

HOPE IT HELPS

PLEASE MARK ME BRAINLIEST ☺️