In case of metallic conductors, the change carries are:
Protons
Electrons
Antiprotons
Positrons
Both (A) and (B)
The rate at which the free electrons pass through any section of a metallic wire from right to left is:
Greater than the speed at which they pass from left to right
Less than the speed at which they pass from left to right
The same speed at which they pass from left to right
Any of above
None of them