When two metal objects, X and Y, are connected to each other by a conducting wire, object X gains electrons.?
From this information, it can be inferred that before the connection was made, object X, compared with object Y, must have had:

A. less capacitance
B. more electrical potential energy
C. a smaller dielectric constant
D. a greater electric charge
E. a greater electric potential

E. a greater electric potential

Explanation:

Positive charges normally move from regions with high potential to a low potential region. Negative charges normally move from regions with low potential to a high potential region. And since object X gains electrons when connected to object Y ( electrons are negative) object X must have had a higher potential than object Y.

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i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.