railway RRB JE (CBT I + CBT II) Mock Test 2024 Electronic Devices Carriers in Semiconductors

A conductor of uniform cross-section and 150 m long has a voltage drop of 1.3 V and a current density of 4.65 × 105 A/m2. The conductivity of the conductor material is

1
4.03 × 107 S/m
2
3.57 × 107 S/m
3
9.03 × 107 S/m
4
5.37 × 107 S/m
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