Question

If the dielectric constant and dielectric strength be denoted by $K$ and $x$ respectively, then a material suitable for use as a dielectric in a capacitor must have

• A. High $k$ and high $x$
  
• B. Low $k$ and Low $x$
• C. High $k$ and Low high $x$
  
• D. Low $k$ and High $x$

Answer 1

The correct option is A High $k$ and high $x$


Higher the value of $k$, higher will be its insulating property and capacitance of capacitor .
Higher the value of $x$, higher will be the ability to withstand electric field gradient (higher breakdown voltage ) and less chance of breakdown of dielectric .
Thus, material should have high $k$ and high $x$.
Hence, the correct option is (A).