635

Which of the following statements is correct when testing transistors?

0.7 V drop from base-to-emitter is an indication of a good junction

Refer to Figure 3. What are the leads called on a silicon controlled rectifier from a through c?

Anode. gate cathode

When checking an SCR with an ohmmeter, what must be done to verify proper triggering operation?

Connect the negative lead to the cathode and the positive lead to the anode

Which of the following statements is correct about current conduction in a bipolar transistor?

Emitter current is the sum of base and collector current

When testing an SCR with an ohmmeter, which is the proper reading when reverse biased?

Infinity/Open

What type of transistor circuit will use a voltage divider on the input to sense high voltages and output +5VDC?

Input level converter

Which of the following statements best describes the operation of a silicon controlled rectifier?

Once triggered, it can be turned off by another trigger pulse at the gate

Which item describes light energy used to trigger a transistor into conduction?

Photons

Which of the following are common uses of transistors?

Switching and amplification

Which of the following is true regarding the proper biasing of an NPN transistor?

The collector and emitter must be forward biased

Which of the following statements is accurate regarding silicon controlled rectifiers in AC circuits?

The earlier the trigger signal is applied, the greater the output current

What is the proper base-emitter junction voltage necessary to cause conduction in a silicon PNP transistor?

a. -0.7 V