Advertisements
Advertisements
प्रश्न
An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.
उत्तर
Energy, E = Power × time
= 750 × 16
= 12000 Wh
or E = 12 kWh
APPEARS IN
संबंधित प्रश्न
(a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel.
(b) In the circuit diagram shown below, find:
(i) Total resistance.
(ii) Current shown by the ammeter A
Which type of circuit, series or parallel, is preferred while connecting a large number of bulbs:
(b) for lighting inside the rooms of the hotel?
An electric bulb is rated as 10 W, 220 V. How many of these bulbs can be connected in parallel across the two wires of 220 V supply line if the maximum current which can be drawn is 5 A?
Match the pairs.
| ‘A’ Group | ‘B’ Group |
| 1. Free electrons | a. V/R |
| 2. Current | b. Increases the resistance in the circuit |
| 3. Resistivity | c. Weakly attached |
| 4. Resistances in series | d. VA/LI |
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
An auto lamp is joined to a battery of e.m.f. 4 V and internal resistance 2.5Ω. A steady current of 0.5 A flows through the circuit. Calculate the
(a) Total energy provided by battery in 10 minutes,
(b) Heat dissipated in the bulb in 10 minutes.
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
True or False – If False give the correct answer
The representation of the electric current is A
