The electric field strength in air at NTP is 3 × 10⁶ V/m. The maximum charge that can be given to a spherical conductor of radius 3 m is:
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The electric field strength in air at NTP is 3 × 10⁶ V/m. The maximum charge that can be given to a spherical conductor of radius 3 m is:

G1 Physics · Accepted Answer

Step 1: Electric field on the conductor surface E = kQ/R². Step 2: Qₘₐₓ = ER²/k = (3 × 10⁶)(3²)/(9 × 10⁹). Step 3: Qₘₐₓ = 3 × 10⁻³ C.