Advertisements
Advertisements
प्रश्न
State whether the resistance of filament of a bulb will decrease, remain unchanged or increase when it glows.
Advertisements
उत्तर
The temperature of the filament increases when it glows. So, when the temperature of the wire (bulb filament) increases, ions in it vibrate violently. As a result, the number of collisions increases and hence the resistance increases.
APPEARS IN
संबंधित प्रश्न
The unit of current is :
How many electrons constitute one unit electric charge in SI system?
Assuming that the charges of an electron is 1.6 × 10-19 coulombs, the number of electrons passing through a section of wire per sec, when the wire carries a current of one ampere is:
Draw a diagram showing two bulbs connected in parallel to a dry cell.
A wire of resistance 1 Ω is stretched to double its length. What will happen to the resistance of the stretched wire?
