Question

plz answer this question...​

Answer 1

Answer:

Hi,

Explanation:

$\huge\boxed{\mathcal\red{Answer:-}}$

Resistance of 1 Bulb = 990 $\ohm$

Total cost of Energy Consumed = Rs. 1.155

$\huge\boxed{\mathcal\red{Explanation:-}}$

Power = $\frak{work \: done}{Time}$

Work Done = Energy

$\therefore$ Power = $\frak{Energy}{Time}$

Energy = Vlt

Time = t

Power = $\frak{VIt}{t}$

Power = VI

$\bf\bold{\mathcal\purple{According \: to \: the \: Question:-}}$

V = 330 V

P = 110 W

T = 5 hrs

Number of Bulbs = 3

Cost of 1 unit of Energy = 70 paise

P = $\frak{V}{I}$

I = $\frak{P}{V}$

I = $\frak{110}{330}$

I = $\frak{1}{3}$ A

$\bf\bold{\mathcal\purple{By \: Ohms \: Law:-}}$

V = IR

R = $\frak{V}{I}$

R = 330 ÷ $\frak{1}{3}$

R = 330 × 3 $\ohm$

R = 990 $\ohm$

$\therefore$ Resistance of 1 Bulb is 990 Ohm

Energy = VIt

E = VIt

E = 330 × 1/3 × 5 wh

E = 550 wh

Energy consumed by 3 Bulbs = 3 × Energy consumed by 1 bulb.

Energy consumed by 3 Bulbs = 3 × 550 wh

Energy consumed by 3 Bulbs = 1650 wh

1 kWh = 1000 wh

1 Wh = 1/1000 kWh

1650 Wh = 1650/1000 kWh

1650 Wh = 1.65 kWh

$\therefore$ Energy consumed by 3 Bulbs is 1650 Wh or 1.65 kWh.

70 paise = RS. 0.7

Cost of one unit of Energy = Rs. 0.7

Cost of 1.65 kWh of energy = RS. 1.155

Hope it will help you ❤️❤️❤️

$\huge{\mathcal\pink{XxLovingBoyxX}}$

Answer 2

Answer:

Rs : 1.155

have a nice day