Four Charged Particles (Two Having a Charge +Q and Two

question 2

Multiple Choice

Four charged particles (two having a charge +Q and two having a charge -Q) are distributed on the xy-plane,as shown below.Each charge is equidistant from the origin.The voltage is zero at infinity.The voltage at location P,which is on the z axis,is

• A)zero.
• B)positive.
• C)negative.
• D)impossible to determine based on the information given.

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Definitions:

Prostatic Urethra

Part of the male urethra, approximately 2.5 cm in length, that passes through the prostate gland.

Semen

Penile ejaculate; thick, yellowish white, viscous fluid containing spermatozoa and secretions of the testes, seminal vesicles, prostate, and bulbourethral glands.

Emission

Discharge; accumulation of semen in the urethra prior to ejaculation. A nocturnal emission is a discharge of semen while asleep.

Ejaculation

The discharge of semen from the male reproductive tract as a result of sexual arousal.