Question

An electric doorbell requires a secondary 15V 50Hz. Use the information in the previous question to determine what type of transformer this is.

a) Step-up transformer
b) Step-down transformer
c) Isolation transformer
d) Autotransformer

Answer 1

The electric doorbell requires a secondary 15V 50Hz. This is a step-down transformer, which decreases the voltage from the primary side to the secondary side. Hence the correct answer is option B

Step-by-step explanation:

The electric doorbell requires a secondary 15V 50Hz. By comparing this with the previous information given, we can determine that this is a step-down transformer. A step-down transformer decreases the voltage from the primary side to the secondary side.

Hence the correct answer is option B