Advertisements
Advertisements
प्रश्न
A 720 W heater operates from a 220 V line voltage. Calculate:
(a) The electrical energy consumed by the heater in 3 h.
(b) The cost of electrical energy consumption at the rate of 60 paise per kWh.
Advertisements
उत्तर
Given, power P =720 w= 0.72 kW
Voltage, V = 220 volt
(a) Electrical energy consumed in 3 h = 0.72 x 3 = 2.16 kWh
(b) Cost of energy consumption @60 paise per kWh= 2.16 x Rs 0.6 =Rs 1.3
APPEARS IN
संबंधित प्रश्न
The atoms of copper contain electrons and the atoms of rubber also contain electrons. Then why does copper conduct electricity but rubber does not conduct electricity?
What is the Flow of Charge Called?
What is an Ammeter? How is It Connected in a Circuit? Draw a Diagram to Illustrate Your Answer.
State the factors on which the strength of electric current flowing in a given conductor depends.
Draw a circuit diagram showing two electric lamps connected in parallel together with a cell and a switch that works both lamps. Mark an â’¶ on your diagram to show where an ammeter should be placed to measure the current.
In a house there are 6 bulbs of 100 W each used for 4 hours a day, 4 bulbs of 60 W each used for 8 hours a day, an immersion heater of 2.5 kW used for 1 hour per day, and an electric iron of 800 W used for 2 hours per day. Calculate the cost of monthly electric bill for the month of April at the rate of 80 p per unit.
Explain, why the potential difference across the terminals of a cell is more when the cell is not in use than it is when the cell is being used.
An electrical appliance is rated at 1000 KVA, 220V. If the appliance is operated for 2 hours, calculate the energy consumed by the appliance in: (i) kWh (ii) joule.
Give the electric current unit.
