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The dielectric strength of air at NTP is $3 \times 10^{6} V / m$ then the maximum charge that can be given to a spherical conductor of radius 3 m is

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detailed solution

Correct option is B

By using E=9×109×QR2⇒3×106=9×109×Q(3)2⇒Q=3×10−3C

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The dielectric strength of air at NTP is 3×106 V​/m then the maximum charge that can be given to a spherical conductor of radius 3 m is

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The dielectric strength of air at NTP is $3 \times 10^{6} V / m$ then the maximum charge that can be given to a spherical conductor of radius 3 m is