1.

The electrical resistivities of four materials A, B, C and D are given below : A   110 x 10-8 Ohm-m B   1.0 x 1010 Ohm-m C   10.0 x 10-8 Ohm-m D   2.3 x 103 Ohm-mWhich material is : (a) good conductor (b) resistor (c) insulator, and (d) semiconductor ?

Answer»

Solution : 

(a) Good conductor = C (10 x 10-8ohm-m) 

(b) Resistor = A (110 x 10-8 ohm-m) 

(c) Insulator= B (1 x 1010 ohm-m) 

(d) Semiconductor= D (2.3 x 103 ohm-m)



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