Advertisements
Advertisements
Question
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.
Solution
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
RELATED QUESTIONS
Which particles constitute the electric current in a metallic conductor?
What is the current in a circuit if the charge passing each point is 20 C in 40 s?
One coulomb of charge flows through any cross-section of a conductor in 1 second. What is the current flowing through the conductor?
If the current through a floodlamp is 5 A, what charge passed in 10 seconds?
(a) 0.5 C
(b) 2 C
(c) 5 C
(d) 50 C
Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
Tick (✓) the correct choice among the following :
There are 500 turns and 2000 turns in the primary and secondary coil of a
transformer respectively. If th e output voltage is 1000 V, how large is the
input voltage?
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
The number of electrons constituting a 1-coulomb charge is ______.
