Conductors
Trending Questions
Q. A coaxial cable contains an insulating material of conductivity σ .If the radius of the central wire is a and that of the sheet is b, then the conductance per unit length is
- ln(ba)2πσV0
- 4πσln(ba)
- 2πσln(ab)
- 2πσln(ba)
Q. A conductor of uniform cross section and 60m long has a voltage drop of 1.2 V and a current densityof 2.56×105A/m2. The conductivity of the material in the conductor is___ ×107S/m
- 1.28
- 2.28
- 3.28
- 4.28