CBSE Class 12 Physics 2023 Outside Delhi Set 1 Paper

Question : 1

Total: 35

SECTION - A

The magnitude of the electric field due to a point charge object at a distance of 4.0m is 9‌

. From the same charged object the electric field of magnitude, 16‌

will be at a distance of

Solution: 👈: Video Solution

In 1‌st ‌ case,
‌E=‌

‌‌ Or, ‌‌‌9=‌

‌‌[r=4.0m]
‌∴‌‌kq=9×16
‌‌ In ‌2‌nd ‌‌ case, ‌
‌E′=‌

(r′)2

‌ Or, ‌‌16‌=‌

9×16

(r′)2

‌ Or, ‌‌(r′)2=9
∴‌r′‌=3m

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