Question

Current cannot flow to ground through

• A. A mechanical ground
• B. An ac ground
• C. A virtual ground
• D. An ordinary ground

Answer 1

The correct option is C A virtual ground

1. Virtual ground refers to a circuit elements that is not connected to the ground directly, it is held at a reference voltage. This reference voltage need not to be same voltage as ground either.

2. While in all other ground it may be mechanical A.C or an ordinary ground it act as a reference point against which other voltage can be measured.

3. The key point is that the current flow from one point of the circuit through ground then back into the circuit.

So, current cannot flow to ground through a virtual ground.