1.

Two opposite and equal charges 4 xx 10^(-8) coulomb when placed 2 xx 10^(-2)cm away, from a dipole. If this dipole is placed in an external electric field 4 xx 10^8 newton/ coulomb, the value of maximum torque and the work done in rotating it through 180^@ will be

Answer»

`64 xx 10^(-4) Nm and 64 xx 10^(-4) J`
`32 xx 10^(-3)Nm and32 xx 10^(-4) J`
`64 xx 10 ^(-4)Nm and 32 xx 10^(-4) J`
`32 xx 10^(-4) Nm and64 xx 10^4 J`

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