An electron has a negative charge. Hope this helps.
Answer:
When we double the angular velocity the maximum acceleration
will changes by a factor of 4.
Explanation:
Given the angular frequency
of the simple harmonic oscillator is doubled.
We need to find the change in the maximum acceleration of the oscillator.

Now, according to the problem, the angular frequency
got doubled.
Let us plug
. Then the maximum acceleration will be 



We can see, when we double the angular velocity the maximum acceleration will changes by a factor of 4.
Just remember
Voltage = current times resistance
current = voltage over resistance
Current = 9/3 = 3
The answer is A.) The ratio of thier masses is always the same