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Which mechanism prevents free electron conduction in a silicon dioxide insulator?

A)Large electronic band gap
B)High phonon scattering rate
C)Increased coulomb repulsion
D)Significant quantum tunneling effect

💡 Explanation

A large electronic band gap prevents free electron flow because electron energies within the gap are forbidden, therefore electrons cannot propagate through the material, rather than alternative scattering mechanisms inherently being insulation reasons..

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