Question

an example of a high resistance fault is:
a) a blown fuse
b) corrosion in a connector
c) a burned out light bulb
d) both a and b

Explanation:

A blown fuse creates a break in the circuit (high resistance as current can't flow easily). Corrosion in a connector increases resistance due to the presence of non - conductive or high - resistance corrosion products. A burned - out light bulb is an open circuit (infinite resistance in a sense, but it's a different type of 'fault' compared to the gradual increase in resistance as in the case of a blown fuse or corrosion).

Answer:

D. both A and B