An electrical appliance rated $1000 W, 250 V$ is connected to mains of voltage $250 V$ . Calculate the cost of the energy consumed in 20 hours, given that the unit cost is Rs 4 per kWh.

Rs. 40

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Rs 80

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Rs. 80000

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Rs. 40000

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
Rs 80

Given, the rating of the appliance as $1000 W, 250 V$

i.e. Power = $1000 W$ , Potential difference = $250 V$ , time = 20 hours
Since the appliance is connected to a voltage source whose potential difference is equal to the voltage rating, the power consumed will be equal to the given power rating.

Thus, Electrical energy = power x time = 1000 x 20 = 20000 Wh = $20 k W h$

Cost of electrical energy = electrical energy consumed in kWh x unit cost
= 20 x 4 = $R s . 80$

Suggest Corrections

Similar questions

An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains. The cost of electrical energy for 60 hrs if consumed at 2.50 per kWh is:

A geyser is rated '1500 W, 250 V'. This geyser is connected to 250 V mains. Calculate :

(i) the current drawn

(ii) the energy consumed in 50 hours and

(iii) the cost of energy consumed at Rs. 4.20 per kWh.

An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains. The electrical energy consumed in 60 hours is:

An electric kettle is rated 2.5 kW, 250 V. The cost of running the kettle for two hours at 60 paise per unit will be

Q. An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains.
Calculate :
(i) The current drawn
(ii) The electrical energy consumed in 60 hours
(iii) The cost of electrical energy consumed at Rs. 2.50/kWh.

Join BYJU'S Learning Program

An electrical appliance rated 1000 W, 250 V is connected to mains of voltage 250 V. Calculate the cost of the energy consumed in 20 hours, given that the unit cost is Rs 4 per kWh.

An electrical appliance rated $1000 W, 250 V$ is connected to mains of voltage $250 V$ . Calculate the cost of the energy consumed in 20 hours, given that the unit cost is Rs 4 per kWh.