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PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Dipole torque and energy

Turn a dipole in a uniform field

An electric dipole has moment 2 × 10⁻⁶ C·m in a uniform 300 N/C field.

Find its maximum torque magnitude.

Organize the givens & assumptions
  • p = 2×10⁻⁶ C·m
  • E = 300 N/C

Ideal rigid electric dipole in a uniform electrostatic field; moment points from negative to positive charge.

  1. A1.2×10−3 N m1.2\times10^{-3}\ \mathrm{N\,m}
  2. B6.0×10−4 N m6.0\times10^{-4}\ \mathrm{N\,m}
  3. C0 N m0\ \mathrm{N\,m}
  4. D3.0×10−4 N m3.0\times10^{-4}\ \mathrm{N\,m}

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