Advertisements
Advertisements
प्रश्न
Two electric lamps each rating 100 W, 110 V are connected in series to a 220 V power supply and two other electric lamps each of marking 100 W, 220 V are connected in parallel to the same power supply. Will anyone of the two combinations give more light than the other? Give a reason for your answer.
Advertisements
उत्तर
Both combinations will give the same light.
Reason: Each combination has the same power namely 200 W.
संबंधित प्रश्न
State two factors on which the electrical energy consumed by an electrical appliance depends.
An electric bulb is rated at 220 V, 100 W. What is its resistance?
When an electric lamp is connected to 12 V battery, it draws a current of 0.5 A. The power of the lamp is:
(a) 0.5 W
(b) 6 W
(c) 12 W
(d) 24 W
An electric current is passed through a metallic wire. The wire gets heated up. Give the reason. Is it possible to melt the wire by passing a heavy current?
What would happen and why, to an electric bulb when it is connected across a supply of voltage (i) lower (ii) higher than its proper rating?
1 mV is equal to:
The average work done by a human heart while it beats once is 0.5 Joule. The power used by heart if it beats 72 times in a minute:
The electrical power and current in the circuit relates by ______
What is the meaning of electric power of an electrical device? Write its SI unit.
