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.
Advertisements
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
A current of 4 A flows around a circuit for 10 s. How much charge flows past a point in the circuit in this time?
Write down the formula which relates electric charge, time and electric current
A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω, 0.5 Ω and 12 Ω. How much current would flow through the 12 Ω resistor?
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(d) Which circuit would have less current in it?
The following table shows the current in Amperes and potential differences in Volts.
- Find the average resistance.
- What will be the nature of the graph between the current and potential difference? (Do not draw a graph.)
- Which law will the graph prove? Explain the law.
| V (volts) | I (amp) |
| 4 | 9 |
| 5 | 11.25 |
| 6 | 13.5 |
Find the effective resistance in the following circuit diagrams (Fig.):
A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V. Calculate:
(i) The resistance of the wire, and
(ii) The heat energy produced in 1 minute.
Assertion (A): Electric current will not flow between two charged bodies when connected if their charges are the same.
Reason (R): Current is the rate of flow of charge.
