Question

1. an scr can be tested by using ____________

a. an ammeter.
b. a voltmeter.
c. a curve tracer.
d. an ohmmeter.

Explanation:

A curve - tracer can display the voltage - current characteristics of an SCR, which helps in testing its functionality. An ammeter measures current, a voltmeter measures voltage, and an ohmmeter measures resistance, but they are not the best for comprehensively testing an SCR.

Answer:

C. a curve tracer.