Advertisements
Advertisements
प्रश्न
An electric oven is rated as 1.5 kW, 250 V. If it is connected to a 250 V mains, calculate the
(a) Current drawn,
(b) Energy consumed in 20 hours,
(c) Cost of energy consumed in 20 hours at the rate of Re. 1 per unit.
उत्तर
Given, Power P = 1.5 kW, voltage V= 250 V
(a) Current, I= `"P"/"V" = (1.5 xx 1000)/250 = 6 "A"`
(b) Energy consumed in 20 hrs= P x t = 1.5 x 20 = 30 kWh
( c) Cost of consumed energy @Re. 1 per unit= 1 x 30 =Rs. 30
APPEARS IN
संबंधित प्रश्न
Draw the electrical symbols of the following components and state its use:
Ammeter.
Three 2 V cells are connected in series and used as a battery in a circuit.
What is the p.d. at the terminals of the battery?
What is the current in a circuit if the charge passing each point is 20 C in 40 s?
If the current passing through a conductor is doubled, what will be the change in heat produced
A charge of 80 C flows in a conductor for 2 minutes.
(a) Calculate the current flowing through the conductor.
(b) If the current through a heater is 4 A what charge must be passing in 8 seconds?
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.
State whether the current is a scalar or vector?
