What is the value of dielectric strength for vacuum?

Options

A. 0
B. 1
C. `oo`
D. 10

Explanation

To determine the value of dielectric strength for a vacuum, we can follow these steps:

### Step 1: Understand Dielectric Strength
Dielectric strength is defined as the maximum electric field that a material can withstand without experiencing breakdown (i.e., without allowing significant current to flow through it). It is usually expressed in volts per meter (V/m).

**Hint:** Remember that dielectric strength is a measure of how well a material can insulate against electric fields.

### Step 2: Consider the Properties of a Vacuum
A vacuum is an empty space devoid of matter, which means it has no particles to ionize. Therefore, it does not have a breakdown voltage in the same way that materials with atoms do.

**Hint:** Think about what happens to electric fields in a vacuum compared to materials with atoms.

### Step 3: Analyze the Breakdown Mechanism
In materials, breakdown occurs when the electric field strength exceeds a certain threshold, causing the material to conduct electricity. In a vacuum, there are no atoms to ionize, so there is no breakdown threshold.

**Hint:** Recall that breakdown occurs due to ionization of atoms; in a vacuum, this process cannot happen.

### Step 4: Conclusion
Since a vacuum does not have any material properties that would allow for breakdown, the dielectric strength of a vacuum is considered to be infinite. This means that it can withstand any amount of electric field without breaking down.

**Hint:** Consider the implications of having no material in a vacuum when discussing dielectric strength.

### Final Answer
The value of dielectric strength for vacuum is infinite.