6.The electric field at (30,30) cm due to a charge of -8nC at the origin in N๐ถ^(−1) is -400(๐‘– ̂ +๐‘— ̂) 400(๐‘– ̂ +๐‘— ̂) -200√2(๐‘– ̂ +๐‘— ̂) 200√2(๐‘– ̂ +๐‘— ̂)

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