Question

1. with an scr crowbar, what else is needed to prevent damage to the power supply?

a. coupling capacitor
b. fuse
c. speakers
d. transformer

Explanation:

An SCR crowbar is a circuit - protection device. A fuse is commonly used along with it to prevent excessive current from damaging the power supply. A fuse will blow (open the circuit) when the current exceeds its rated value. Coupling capacitors are for signal coupling, speakers are for audio output, and transformers are for voltage transformation, none of which directly prevent power - supply damage in the context of an SCR crowbar like a fuse does.

Answer:

B. fuse