Q3 of 35 Page 90

Electrical resistivity of a given metallic wire depends upon

Electrical Resistivity is given by the relation:



ρ is inversely proportional to the number density of free of electrons i.e. nature of the material.

More from this chapter

All 35 →
1

A cell, a resistor, a key and ammeter are arranged as shown in the circuit diagrams of Figure12.1. The current recorded in the ammeter will be

 2

In the following circuits (Figure 12.2), heat produced in the resistor or combination of resistors connected to a 12 V battery will be

 4

A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly

 5

Identify the circuit (Figure 12.3) in which the electrical components have been properly connected.