Advertisements
Advertisements
प्रश्न
Draw a V-I graph for a conductor at two different temperatures. What conclusion do you draw from your graph for the variation of resistance of conductor with temperature?
Advertisements
उत्तर
In the above graph, T1 > T2. The straight line A is steeper than line B, which leads us to conclude that the resistance of a the conductor is more at high-temperature T1 than at low-temperature T2. Thus, we can say that the resistance of a conductor increases with an increase in temperature.
APPEARS IN
संबंधित प्रश्न
How does the resistance of a pure metal change if its temperature decreases?
How does the resistance of a wire change when:
its diameter is tripled?
State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator.
In series combination of resistances ______.
Two resistors of 4Ω and 6Ω are connected in parallel to a cell to draw 0.5 A current from the cell. Calculate the current in each resistor.
The resistance of two resistors joined in series is 8Ω and in parallel is 1.5Ω. Find the value of the two resistances.
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then:
The resistance of the hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamps, when not in use?
