Why does resistivity of metal increase with temperature

Ab aap Whatsapp pe solutions paa saktey h, hum aapko message karenge. Ab aap Whatsapp pe solutions paa saktey h, hum aapko ping karenge. Study Materials. Why use Doubtnut? Instant Video Solutions. Request OTP. Updated On: Share This Video Whatsapp. Text Solution. Solution :. When the short circuit condition occurs, the current in the circuit.

In an incandescent electric bulb, the filament of the bulb is made up of which metal? Which resistive component is temperature sensitive? Temperature dependence of resistivity of a metal can be described by. Tungsten is used for making bulb filaments of incandescent lamps because:. The work done to move a unit charge from a point to another is called :. Find the value of the current across both resistors?

When this DC source is removed and an AC source is connected to the resistance, then new resistance will be-. At the time of short circuit, the current in the circuit.

Who invented the first electric battery? What is the unit of resistance? The internal resistance of an ammeter should be. Negative, positive II. Negative, Negative III. Positive, Positive. As they do so their progress is interrupted by collisions. These collisions impede their movement and this property of the material is called its resistance. If the temperature of the metal is raised the atoms vibrate more strongly and the electrons make more violent collisions with them and so the resistance of the metal increase see later.

The resistance of any conducting material depends on the following factors: a the material itself actually how many free electrons there are per metre cubed b its length c its cross-sectional area and d its temperature The resistance of a given piece of material is connected to the current flowing through it and the potential difference between its ends by the equation:.

If the ratio of p. This is true for a metallic conductor at a constant temperature see Figure 2 This means that although we can always work out the resistance of a specimen knowing the current through it and the p.