Two point charges lie on the y axis. A third charge q is placed somewhere in spa

Question

Two point charges lie on the y axis. A third charge q is placed somewhere in space such that the resultant force on it is zero. Where must the third charge lie? The third charge must be equi - distant from the two given charges. The two given charges must have opposite signs for the force on the third charge to be zero. There must be an additional charge (fourth charge) to balance the unresolved force on the third charge. The two given charges must have the same sign for the force on the third charge to be zero. The third "charge" must be zero; q = 0. The third charge must lie on the x axis. The third charge must lie on the y axis. The third charge must lie on the 2 axis (perpendicular to the xy plane). What is the sign of the third charge q? q = + |q|, the charge must be positive. q = - |q|, the charge must be negative. Since q must be zero, the sign is undefined. q = plusminus |q|, the charge can be positive or negative.

Explanation / Answer

  7.    The third charge must lie on the y axis.    4. ±|q|, the charge can be +ve or -ve.

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