1.

10 xx 10^(-6)C charge is uniformly spread over the cube of face length 1 mm. The density of charge will be .........Cm^-3

Answer»

`10^(-4)`
`10^(4)`
`10^(-1)`
10

Solution :`RARR RHO = Q/V = Q/(l)^(3) = 10^(-5)/(10^(-3))^(3) = 10^(-5)/10^(-9)`
`=10^(4)Cm^(-3)`


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