Megger works on the principle of ________

• A. kirchhoff‚Äö√Ñ√∂‚àö√ë‚àö¬•s current laws
• B. ohm‚Äö√Ñ√∂‚àö√ë‚àö¬•s law
• C. gauss‚Äö√Ñ√∂‚àö√ë‚àö¬•s law
• D. electromagnetic induction