An electrician is testing a 20-ampere, 125-volt duplex receptacle with a voltage tester. The tester indicates 120 volts between the ungrounded slot and the grounded slot. The tester also indicates 0 volts between the ungrounded slot and the grounding slot. The likely cause is __________.
a. an open equipment-grounding path
b. reversed polarity at the receptacle
c. an open grounded circuit conductor
d. a short circuit in the cable feeding the receptacle
b. reversed polarity at the receptacle
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