The density of copper is 9 imes 103 kg/m39\,\, imes \,\,{10^3}\,\,{\rm{kg}}/{{\rm{m}}^3}9imes103kg/m3 and its atomic mass is 63.5 u{\rm{63}}{\rm{.5}}\,\,{\rm{u}}63.5u. Each copper atom provides one free electron. Estimate the number of free electrons per cubic metre in copper.
1019{10^{19}}1019
1023{10^{23}}1023
1025{10^{25}}1025
1029{10^{29}}1029
Related Questions
The speed at which the current travels, in a conductor, is nearly
3 imes 10−4 ms−13\,\, imes \,\,{10^{ - 4}}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}3imes10−4ms−1
3 imes 10−5 ms−13\,\, imes \,\,{10^{ - 5}}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}3imes10−5ms−1
4 imes 106 ms−14\,\, imes \,\,{10^6}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}4imes106ms−1
3 imes 108 ms−13\,\, imes \,\,{10^8}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}3imes108ms−1
When a current flows through a conductor its temperature
May increase or decrease
Remains same
Decrease
Increase
