3. (Ch. 20 Problem 66 in Wolfson) A dipole with charges q and separation 2a is located a distance x from a point charge +Q, oriented as shown below. Find expressions for the magnitude of (a) the net torque and (b) the net force on the dipole, both in the limit x » a. (c) What's the direction of the net force? +q +Q + q 2a
3. (Ch. 20 Problem 66 in Wolfson) A dipole with charges q and separation 2a is located a distance x from a point charge +Q, oriented as shown below. Find expressions for the magnitude of (a) the net torque and (b) the net force on the dipole, both in the limit x » a. (c) What's the direction of the net force? +q +Q + q 2a
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