The water molecule is a permanent dipole with a dipole moment of 6.186×1030 Cm.
ID: 1500526 • Letter: T
Question
The water molecule is a permanent dipole with a dipole moment of 6.186×1030 Cm. Part A If a single water molecule were oriented such that its dipole moment is along a z axis, what is the magnitude of torque that is caused on it by the electric force due to an 8700-N/C electric field if that field is in the xz plane and directed 42 above the x axis? Express your answer with the appropriate units. r vector=
Part B What is the direction of this torque vector? What is the direction of this torque vector?
Positive x direction. Negative x direction. Positive y direction. Negative y direction. Positive z direction. Negative z direction.
Explanation / Answer
the magnitude of torque that is caused on it by the electric force is
T = PE sin theta = 6.186×10^-30 Cm( 8700 ) sin ( 90-42)= 3.99 * 10^-26 Nm
the direction of torque is along positive y direction
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