Question

A geyser has a rating 200W, 240V. i. What is the electrical energy consumed by it in kwh if used 1 hr. each day for 30 days. ii. If the cost of electricity is ₹ 3.50 per commercial unit, find the total cost.​

Answer 1

Answer:

Energy = Power × Time

= 2 kW × 1/4 hour

= 0.5 kWh

= 0.5 unit

Cost = 0.5 unit × ₹4 /unit = ₹2

Answer 2

Answer:

Explanation:

Given that,

Power of geyser = 200 W

Voltage = 240 V

Time = 1 hr

Cost of electricity = 3.50 ₹

We need to calculate the energy consumed

Using formula of energy consumed

$E_{c}=pt$

Put the value into the formula

$E_{c}=200\times1$

$E_{c}=0.2\ kWh$

We need to calculate the energy consumed in 30 days

Using formula of energy consumed

$E=E_{c}\times\text{days}$

Put the value in to the formula

$E=0.2\times30$

$E=6\ kWh$

We need to calculate the cost of electricity

Using formula of cost of electricity

$\text{total cost}=E\times\text{cost}$

Put the value into the formula

$\text{total cost}=6\times3.50$

$\text{total cost}=21\ rupees$

Hence, The total cost is 21 ₹.